./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:17:25,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:17:25,861 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:17:25,868 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:17:25,868 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:17:25,895 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:17:25,896 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:17:25,896 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:17:25,897 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:17:25,903 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:17:25,903 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:17:25,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:17:25,904 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:17:25,905 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:17:25,906 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:17:25,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:17:25,906 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:17:25,907 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:17:25,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:17:25,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:17:25,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:17:25,908 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:17:25,908 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:17:25,908 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:17:25,909 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:17:25,909 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:17:25,909 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:17:25,909 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:17:25,910 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:17:25,911 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:17:25,912 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:17:25,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:17:25,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:17:25,912 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:17:25,913 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:17:25,913 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:17:25,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:17:25,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:17:25,913 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:17:25,914 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:17:25,914 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:17:25,914 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:17:25,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:17:25,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:17:26,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:17:26,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:17:26,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:17:26,222 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:17:26,223 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:17:26,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:17:27,407 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:17:27,675 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:17:27,676 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:17:27,700 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c34e62d/8d6757e2be26473bbb162b2a218293ac/FLAGcfe7e792b [2024-06-27 20:17:27,713 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c34e62d/8d6757e2be26473bbb162b2a218293ac [2024-06-27 20:17:27,718 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:17:27,719 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:17:27,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 20:17:27,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:17:27,962 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:17:27,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:17:27,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:17:27,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:17:27,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:17:27" (1/2) ... [2024-06-27 20:17:27,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3195cb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:27, skipping insertion in model container [2024-06-27 20:17:27,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:17:27" (1/2) ... [2024-06-27 20:17:27,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54b441fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:27, skipping insertion in model container [2024-06-27 20:17:27,973 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:17:27" (2/2) ... [2024-06-27 20:17:27,973 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3195cb4e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:27, skipping insertion in model container [2024-06-27 20:17:27,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:17:27" (2/2) ... [2024-06-27 20:17:27,973 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:17:28,074 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:17:28,075 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 20:17:28,075 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 20:17:28,076 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 20:17:28,076 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:17:28,076 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 20:17:28,121 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:17:28,485 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:17:28,500 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:17:28,635 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:17:28,676 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:17:28,677 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28 WrapperNode [2024-06-27 20:17:28,677 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:17:28,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:17:28,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:17:28,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:17:28,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,705 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,736 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 129 [2024-06-27 20:17:28,742 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:17:28,742 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:17:28,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:17:28,748 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:17:28,758 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,762 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,788 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 20:17:28,788 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,789 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:17:28,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:17:28,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:17:28,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:17:28,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (1/1) ... [2024-06-27 20:17:28,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:17:28,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:17:28,845 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 20:17:28,857 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 20:17:28,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:17:28,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:17:28,892 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:17:28,892 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:17:28,892 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:17:28,892 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:17:28,893 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:17:28,893 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:17:28,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:17:28,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:17:28,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:17:28,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:17:28,895 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 20:17:29,044 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:17:29,046 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:17:29,407 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:17:29,408 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:17:29,607 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:17:29,607 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:17:29,608 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:17:29 BoogieIcfgContainer [2024-06-27 20:17:29,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:17:29,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:17:29,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:17:29,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:17:29,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:17:27" (1/4) ... [2024-06-27 20:17:29,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf4545c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:17:29, skipping insertion in model container [2024-06-27 20:17:29,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:17:27" (2/4) ... [2024-06-27 20:17:29,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf4545c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:17:29, skipping insertion in model container [2024-06-27 20:17:29,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:28" (3/4) ... [2024-06-27 20:17:29,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf4545c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:17:29, skipping insertion in model container [2024-06-27 20:17:29,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:17:29" (4/4) ... [2024-06-27 20:17:29,617 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:17:29,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:17:29,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:17:29,633 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:17:29,681 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:17:29,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 20:17:29,755 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-27 20:17:29,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:17:29,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:17:29,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 20:17:29,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-27 20:17:29,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:17:29,815 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;@ea125b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:17:29,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:17:29,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:17:29,830 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:17:29,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:17:29,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:29,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:17:29,832 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 20:17:29,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash 386398261, now seen corresponding path program 1 times [2024-06-27 20:17:29,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:29,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549398931] [2024-06-27 20:17:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:29,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:30,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:30,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549398931] [2024-06-27 20:17:30,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549398931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:30,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:30,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:17:30,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051550412] [2024-06-27 20:17:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:30,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:17:30,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:17:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:17:31,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:31,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:31,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:31,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:31,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:31,719 INFO L124 PetriNetUnfolderBase]: 1911/2945 cut-off events. [2024-06-27 20:17:31,720 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 20:17:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5869 conditions, 2945 events. 1911/2945 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14834 event pairs, 1379 based on Foata normal form. 1/2857 useless extension candidates. Maximal degree in co-relation 5857. Up to 2825 conditions per place. [2024-06-27 20:17:31,744 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 20:17:31,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-27 20:17:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:17:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:17:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 20:17:31,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-27 20:17:31,759 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 80 transitions. [2024-06-27 20:17:31,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-27 20:17:31,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:31,767 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-27 20:17:31,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 20:17:31,772 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 20:17:31,773 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-27 20:17:31,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:31,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:31,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:31,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:17:31,774 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 20:17:31,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:31,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1962653832, now seen corresponding path program 1 times [2024-06-27 20:17:31,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:31,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648788530] [2024-06-27 20:17:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:31,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648788530] [2024-06-27 20:17:32,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648788530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:32,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:32,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:17:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437107830] [2024-06-27 20:17:32,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:32,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:17:32,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:17:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:17:32,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:32,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 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 20:17:32,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:32,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:32,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:33,118 INFO L124 PetriNetUnfolderBase]: 1905/2936 cut-off events. [2024-06-27 20:17:33,119 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2024-06-27 20:17:33,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6557 conditions, 2936 events. 1905/2936 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14810 event pairs, 1212 based on Foata normal form. 3/2890 useless extension candidates. Maximal degree in co-relation 6545. Up to 2801 conditions per place. [2024-06-27 20:17:33,136 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 20:17:33,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 248 flow [2024-06-27 20:17:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:17:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:17:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-27 20:17:33,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-27 20:17:33,138 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 103 transitions. [2024-06-27 20:17:33,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 248 flow [2024-06-27 20:17:33,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:17:33,140 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-27 20:17:33,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 20:17:33,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-27 20:17:33,142 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-27 20:17:33,142 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 20:17:33,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:33,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:17:33,143 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 20:17:33,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash 712727238, now seen corresponding path program 1 times [2024-06-27 20:17:33,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819881756] [2024-06-27 20:17:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:34,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:34,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819881756] [2024-06-27 20:17:34,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819881756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:34,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:34,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:17:34,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540034389] [2024-06-27 20:17:34,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:34,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:17:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:17:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:17:34,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:34,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 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 20:17:34,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:34,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:34,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:34,571 INFO L124 PetriNetUnfolderBase]: 1913/2962 cut-off events. [2024-06-27 20:17:34,572 INFO L125 PetriNetUnfolderBase]: For 1563/1563 co-relation queries the response was YES. [2024-06-27 20:17:34,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7292 conditions, 2962 events. 1913/2962 cut-off events. For 1563/1563 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15055 event pairs, 951 based on Foata normal form. 5/2925 useless extension candidates. Maximal degree in co-relation 7278. Up to 2747 conditions per place. [2024-06-27 20:17:34,634 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-27 20:17:34,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 402 flow [2024-06-27 20:17:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:17:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:17:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-27 20:17:34,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-06-27 20:17:34,641 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 134 transitions. [2024-06-27 20:17:34,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 402 flow [2024-06-27 20:17:34,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 388 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:17:34,645 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-27 20:17:34,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-27 20:17:34,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-27 20:17:34,647 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-27 20:17:34,647 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 20:17:34,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:34,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:34,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:17:34,649 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 20:17:34,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:34,649 INFO L85 PathProgramCache]: Analyzing trace with hash -433105421, now seen corresponding path program 1 times [2024-06-27 20:17:34,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:34,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195202008] [2024-06-27 20:17:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:34,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:35,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:35,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195202008] [2024-06-27 20:17:35,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195202008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:35,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:35,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:17:35,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638906404] [2024-06-27 20:17:35,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:35,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:17:35,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:17:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:17:35,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:35,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 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 20:17:35,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:35,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:35,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:36,511 INFO L124 PetriNetUnfolderBase]: 1921/2974 cut-off events. [2024-06-27 20:17:36,511 INFO L125 PetriNetUnfolderBase]: For 3601/3603 co-relation queries the response was YES. [2024-06-27 20:17:36,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8537 conditions, 2974 events. 1921/2974 cut-off events. For 3601/3603 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15086 event pairs, 784 based on Foata normal form. 7/2939 useless extension candidates. Maximal degree in co-relation 8520. Up to 2733 conditions per place. [2024-06-27 20:17:36,531 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 61 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-27 20:17:36,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 529 flow [2024-06-27 20:17:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 20:17:36,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-06-27 20:17:36,533 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 158 transitions. [2024-06-27 20:17:36,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 529 flow [2024-06-27 20:17:36,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 521 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:17:36,538 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 314 flow [2024-06-27 20:17:36,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 20:17:36,539 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-27 20:17:36,539 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 314 flow [2024-06-27 20:17:36,539 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 20:17:36,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:36,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:36,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:17:36,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:36,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:36,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2031095557, now seen corresponding path program 1 times [2024-06-27 20:17:36,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:36,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348127017] [2024-06-27 20:17:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:36,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:37,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:37,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348127017] [2024-06-27 20:17:37,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348127017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:37,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:37,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:37,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067579095] [2024-06-27 20:17:37,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:37,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:37,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:37,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:37,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:37,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:37,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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 20:17:37,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:37,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:37,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:38,584 INFO L124 PetriNetUnfolderBase]: 1933/2994 cut-off events. [2024-06-27 20:17:38,584 INFO L125 PetriNetUnfolderBase]: For 5677/5679 co-relation queries the response was YES. [2024-06-27 20:17:38,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9498 conditions, 2994 events. 1933/2994 cut-off events. For 5677/5679 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15232 event pairs, 596 based on Foata normal form. 12/2964 useless extension candidates. Maximal degree in co-relation 9478. Up to 2701 conditions per place. [2024-06-27 20:17:38,610 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 65 selfloop transitions, 23 changer transitions 0/95 dead transitions. [2024-06-27 20:17:38,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 630 flow [2024-06-27 20:17:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 20:17:38,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-27 20:17:38,612 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 314 flow. Second operand 7 states and 178 transitions. [2024-06-27 20:17:38,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 630 flow [2024-06-27 20:17:38,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 581 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:38,622 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-27 20:17:38,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-27 20:17:38,625 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-27 20:17:38,625 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-27 20:17:38,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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 20:17:38,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:38,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:38,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:17:38,631 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 20:17:38,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash -631748548, now seen corresponding path program 1 times [2024-06-27 20:17:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:38,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777923115] [2024-06-27 20:17:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:38,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777923115] [2024-06-27 20:17:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777923115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:39,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:39,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:17:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919328828] [2024-06-27 20:17:39,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:39,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:17:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:17:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:17:39,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:39,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:39,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:39,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:39,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:39,962 INFO L124 PetriNetUnfolderBase]: 1928/2981 cut-off events. [2024-06-27 20:17:39,963 INFO L125 PetriNetUnfolderBase]: For 7782/7782 co-relation queries the response was YES. [2024-06-27 20:17:39,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10091 conditions, 2981 events. 1928/2981 cut-off events. For 7782/7782 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15122 event pairs, 776 based on Foata normal form. 2/2939 useless extension candidates. Maximal degree in co-relation 10069. Up to 2844 conditions per place. [2024-06-27 20:17:39,984 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 55 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-06-27 20:17:39,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 495 flow [2024-06-27 20:17:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:17:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:17:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-27 20:17:39,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-27 20:17:39,986 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 5 states and 102 transitions. [2024-06-27 20:17:39,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 495 flow [2024-06-27 20:17:39,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 431 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:39,993 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 301 flow [2024-06-27 20:17:39,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-27 20:17:39,994 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-27 20:17:39,994 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 301 flow [2024-06-27 20:17:39,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:39,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:39,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:39,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:17:39,995 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 20:17:39,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1860159738, now seen corresponding path program 1 times [2024-06-27 20:17:39,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:39,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176509893] [2024-06-27 20:17:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:39,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:40,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:40,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176509893] [2024-06-27 20:17:40,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176509893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:40,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:40,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:40,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373247456] [2024-06-27 20:17:40,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:40,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:40,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:40,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:40,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:40,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:40,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:41,762 INFO L124 PetriNetUnfolderBase]: 2264/3484 cut-off events. [2024-06-27 20:17:41,762 INFO L125 PetriNetUnfolderBase]: For 10324/10324 co-relation queries the response was YES. [2024-06-27 20:17:41,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11653 conditions, 3484 events. 2264/3484 cut-off events. For 10324/10324 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17571 event pairs, 936 based on Foata normal form. 2/3477 useless extension candidates. Maximal degree in co-relation 11629. Up to 3319 conditions per place. [2024-06-27 20:17:41,784 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-27 20:17:41,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 501 flow [2024-06-27 20:17:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:17:41,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-27 20:17:41,786 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 301 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:17:41,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 501 flow [2024-06-27 20:17:41,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 479 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:41,795 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 335 flow [2024-06-27 20:17:41,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-27 20:17:41,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-27 20:17:41,796 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 335 flow [2024-06-27 20:17:41,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:41,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:41,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:41,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:17:41,797 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 20:17:41,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:41,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1781883887, now seen corresponding path program 1 times [2024-06-27 20:17:41,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:41,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893358039] [2024-06-27 20:17:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:41,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:42,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:42,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893358039] [2024-06-27 20:17:42,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893358039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:42,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:42,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:42,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443271579] [2024-06-27 20:17:42,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:42,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:42,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:42,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:42,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:42,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 335 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 20:17:42,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:42,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:42,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:43,483 INFO L124 PetriNetUnfolderBase]: 2136/3356 cut-off events. [2024-06-27 20:17:43,483 INFO L125 PetriNetUnfolderBase]: For 13134/13138 co-relation queries the response was YES. [2024-06-27 20:17:43,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11963 conditions, 3356 events. 2136/3356 cut-off events. For 13134/13138 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17417 event pairs, 853 based on Foata normal form. 8/3353 useless extension candidates. Maximal degree in co-relation 11939. Up to 3068 conditions per place. [2024-06-27 20:17:43,508 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 58 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-27 20:17:43,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 589 flow [2024-06-27 20:17:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 20:17:43,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 20:17:43,514 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 335 flow. Second operand 6 states and 129 transitions. [2024-06-27 20:17:43,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 589 flow [2024-06-27 20:17:43,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 557 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:43,525 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 375 flow [2024-06-27 20:17:43,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-27 20:17:43,527 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-27 20:17:43,527 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 375 flow [2024-06-27 20:17:43,528 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 20:17:43,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:43,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:17:43,528 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 20:17:43,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1751260847, now seen corresponding path program 2 times [2024-06-27 20:17:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:43,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850430082] [2024-06-27 20:17:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:44,405 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 20:17:44,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850430082] [2024-06-27 20:17:44,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850430082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:44,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:44,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895438855] [2024-06-27 20:17:44,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:44,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:44,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:44,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:44,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 375 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 20:17:44,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:44,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:44,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:45,145 INFO L124 PetriNetUnfolderBase]: 2121/3330 cut-off events. [2024-06-27 20:17:45,145 INFO L125 PetriNetUnfolderBase]: For 15350/15350 co-relation queries the response was YES. [2024-06-27 20:17:45,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12238 conditions, 3330 events. 2121/3330 cut-off events. For 15350/15350 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17281 event pairs, 849 based on Foata normal form. 2/3321 useless extension candidates. Maximal degree in co-relation 12213. Up to 3109 conditions per place. [2024-06-27 20:17:45,167 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-27 20:17:45,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 557 flow [2024-06-27 20:17:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:17:45,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:17:45,168 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 375 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:17:45,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 557 flow [2024-06-27 20:17:45,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 528 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:45,177 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 376 flow [2024-06-27 20:17:45,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-27 20:17:45,178 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-27 20:17:45,178 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 376 flow [2024-06-27 20:17:45,178 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 20:17:45,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:45,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:45,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:17:45,179 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 20:17:45,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1830378617, now seen corresponding path program 1 times [2024-06-27 20:17:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:45,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56064210] [2024-06-27 20:17:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:46,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:46,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56064210] [2024-06-27 20:17:46,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56064210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:46,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:46,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:46,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359093123] [2024-06-27 20:17:46,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:46,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:46,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:46,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:46,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:46,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 376 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 20:17:46,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:46,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:46,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:46,893 INFO L124 PetriNetUnfolderBase]: 2245/3433 cut-off events. [2024-06-27 20:17:46,893 INFO L125 PetriNetUnfolderBase]: For 17996/17996 co-relation queries the response was YES. [2024-06-27 20:17:46,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12876 conditions, 3433 events. 2245/3433 cut-off events. For 17996/17996 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17138 event pairs, 888 based on Foata normal form. 4/3424 useless extension candidates. Maximal degree in co-relation 12850. Up to 3271 conditions per place. [2024-06-27 20:17:46,912 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-27 20:17:46,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 614 flow [2024-06-27 20:17:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:17:46,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:17:46,913 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 376 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:17:46,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 614 flow [2024-06-27 20:17:46,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 567 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:46,923 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 395 flow [2024-06-27 20:17:46,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-27 20:17:46,924 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-27 20:17:46,924 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 395 flow [2024-06-27 20:17:46,924 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 20:17:46,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:46,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:46,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:17:46,925 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 20:17:46,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:46,925 INFO L85 PathProgramCache]: Analyzing trace with hash 900488729, now seen corresponding path program 1 times [2024-06-27 20:17:46,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:46,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254782503] [2024-06-27 20:17:46,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:46,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:47,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:47,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254782503] [2024-06-27 20:17:47,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254782503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:47,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:47,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:47,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080925619] [2024-06-27 20:17:47,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:47,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:48,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:48,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 395 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 20:17:48,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:48,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:48,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:48,682 INFO L124 PetriNetUnfolderBase]: 2267/3500 cut-off events. [2024-06-27 20:17:48,682 INFO L125 PetriNetUnfolderBase]: For 21426/21430 co-relation queries the response was YES. [2024-06-27 20:17:48,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13713 conditions, 3500 events. 2267/3500 cut-off events. For 21426/21430 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17741 event pairs, 872 based on Foata normal form. 5/3490 useless extension candidates. Maximal degree in co-relation 13686. Up to 3193 conditions per place. [2024-06-27 20:17:48,702 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-27 20:17:48,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 743 flow [2024-06-27 20:17:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:17:48,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-27 20:17:48,705 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 395 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:17:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 743 flow [2024-06-27 20:17:48,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 701 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:48,724 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 476 flow [2024-06-27 20:17:48,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-27 20:17:48,725 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-27 20:17:48,725 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 476 flow [2024-06-27 20:17:48,725 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 20:17:48,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:48,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:48,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:17:48,726 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 20:17:48,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash 127234807, now seen corresponding path program 2 times [2024-06-27 20:17:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:48,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348905251] [2024-06-27 20:17:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:49,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348905251] [2024-06-27 20:17:49,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348905251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:49,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:49,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:49,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881374787] [2024-06-27 20:17:49,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:49,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:49,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:49,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:49,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:49,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:49,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 476 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 20:17:49,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:49,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:49,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:50,284 INFO L124 PetriNetUnfolderBase]: 2278/3515 cut-off events. [2024-06-27 20:17:50,284 INFO L125 PetriNetUnfolderBase]: For 25786/25786 co-relation queries the response was YES. [2024-06-27 20:17:50,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14680 conditions, 3515 events. 2278/3515 cut-off events. For 25786/25786 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17785 event pairs, 864 based on Foata normal form. 2/3502 useless extension candidates. Maximal degree in co-relation 14652. Up to 3328 conditions per place. [2024-06-27 20:17:50,306 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 77 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-27 20:17:50,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 738 flow [2024-06-27 20:17:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:17:50,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:17:50,308 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 476 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:17:50,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 738 flow [2024-06-27 20:17:50,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 700 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:50,327 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 512 flow [2024-06-27 20:17:50,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-27 20:17:50,328 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-27 20:17:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 512 flow [2024-06-27 20:17:50,328 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 20:17:50,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:50,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:50,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:17:50,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:50,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash 906917819, now seen corresponding path program 3 times [2024-06-27 20:17:50,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:50,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821511798] [2024-06-27 20:17:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:50,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:51,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:51,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821511798] [2024-06-27 20:17:51,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821511798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:51,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:51,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:51,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506696233] [2024-06-27 20:17:51,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:51,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:51,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:51,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:51,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:51,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:51,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 512 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 20:17:51,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:51,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:51,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:51,999 INFO L124 PetriNetUnfolderBase]: 2273/3508 cut-off events. [2024-06-27 20:17:52,000 INFO L125 PetriNetUnfolderBase]: For 29902/29902 co-relation queries the response was YES. [2024-06-27 20:17:52,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15114 conditions, 3508 events. 2273/3508 cut-off events. For 29902/29902 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17715 event pairs, 864 based on Foata normal form. 2/3495 useless extension candidates. Maximal degree in co-relation 15084. Up to 3303 conditions per place. [2024-06-27 20:17:52,020 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 75 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-27 20:17:52,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 786 flow [2024-06-27 20:17:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:17:52,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-27 20:17:52,022 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 512 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:17:52,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 786 flow [2024-06-27 20:17:52,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 740 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:52,042 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 556 flow [2024-06-27 20:17:52,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-27 20:17:52,043 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-27 20:17:52,043 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 556 flow [2024-06-27 20:17:52,044 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 20:17:52,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:52,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:52,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:17:52,044 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:52,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:52,045 INFO L85 PathProgramCache]: Analyzing trace with hash -108138202, now seen corresponding path program 1 times [2024-06-27 20:17:52,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:52,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106596178] [2024-06-27 20:17:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:52,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:52,695 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 20:17:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106596178] [2024-06-27 20:17:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106596178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:52,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:17:52,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790786200] [2024-06-27 20:17:52,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:17:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:17:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:17:52,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:52,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 556 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:52,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:52,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:52,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:53,295 INFO L124 PetriNetUnfolderBase]: 2486/3849 cut-off events. [2024-06-27 20:17:53,295 INFO L125 PetriNetUnfolderBase]: For 38890/38890 co-relation queries the response was YES. [2024-06-27 20:17:53,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17016 conditions, 3849 events. 2486/3849 cut-off events. For 38890/38890 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19505 event pairs, 990 based on Foata normal form. 1/3849 useless extension candidates. Maximal degree in co-relation 16985. Up to 3628 conditions per place. [2024-06-27 20:17:53,313 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 73 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-06-27 20:17:53,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 762 flow [2024-06-27 20:17:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:17:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:17:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 20:17:53,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-27 20:17:53,315 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 556 flow. Second operand 5 states and 94 transitions. [2024-06-27 20:17:53,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 762 flow [2024-06-27 20:17:53,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 700 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:53,337 INFO L231 Difference]: Finished difference. Result has 77 places, 83 transitions, 546 flow [2024-06-27 20:17:53,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=77, PETRI_TRANSITIONS=83} [2024-06-27 20:17:53,338 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-27 20:17:53,338 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 83 transitions, 546 flow [2024-06-27 20:17:53,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:53,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:53,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:53,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:17:53,339 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 20:17:53,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:53,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1144725144, now seen corresponding path program 1 times [2024-06-27 20:17:53,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:53,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387465872] [2024-06-27 20:17:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:53,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:54,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:54,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387465872] [2024-06-27 20:17:54,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387465872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:54,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:54,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:54,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304503319] [2024-06-27 20:17:54,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:54,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:54,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:54,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:54,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:54,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:54,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 83 transitions, 546 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 20:17:54,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:54,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:54,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:55,320 INFO L124 PetriNetUnfolderBase]: 2147/3373 cut-off events. [2024-06-27 20:17:55,321 INFO L125 PetriNetUnfolderBase]: For 37969/37971 co-relation queries the response was YES. [2024-06-27 20:17:55,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15562 conditions, 3373 events. 2147/3373 cut-off events. For 37969/37971 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17500 event pairs, 796 based on Foata normal form. 4/3376 useless extension candidates. Maximal degree in co-relation 15530. Up to 3024 conditions per place. [2024-06-27 20:17:55,338 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-27 20:17:55,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 115 transitions, 858 flow [2024-06-27 20:17:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 20:17:55,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 20:17:55,340 INFO L175 Difference]: Start difference. First operand has 77 places, 83 transitions, 546 flow. Second operand 8 states and 167 transitions. [2024-06-27 20:17:55,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 115 transitions, 858 flow [2024-06-27 20:17:55,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 115 transitions, 828 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:55,354 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 613 flow [2024-06-27 20:17:55,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-06-27 20:17:55,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-27 20:17:55,355 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 613 flow [2024-06-27 20:17:55,355 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 20:17:55,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:55,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:55,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:17:55,356 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 20:17:55,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:55,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1301579723, now seen corresponding path program 1 times [2024-06-27 20:17:55,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:55,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158371153] [2024-06-27 20:17:55,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:55,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:56,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:56,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158371153] [2024-06-27 20:17:56,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158371153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:56,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:56,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:56,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159856214] [2024-06-27 20:17:56,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:56,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:56,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:56,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:56,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:56,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:56,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 613 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 20:17:56,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:56,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:56,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:57,000 INFO L124 PetriNetUnfolderBase]: 2276/3507 cut-off events. [2024-06-27 20:17:57,000 INFO L125 PetriNetUnfolderBase]: For 43267/43269 co-relation queries the response was YES. [2024-06-27 20:17:57,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16917 conditions, 3507 events. 2276/3507 cut-off events. For 43267/43269 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17665 event pairs, 850 based on Foata normal form. 2/3508 useless extension candidates. Maximal degree in co-relation 16884. Up to 3198 conditions per place. [2024-06-27 20:17:57,018 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-27 20:17:57,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 999 flow [2024-06-27 20:17:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 20:17:57,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:17:57,020 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 613 flow. Second operand 7 states and 147 transitions. [2024-06-27 20:17:57,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 999 flow [2024-06-27 20:17:57,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 928 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:57,041 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 660 flow [2024-06-27 20:17:57,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-06-27 20:17:57,042 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-27 20:17:57,042 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 660 flow [2024-06-27 20:17:57,042 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 20:17:57,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:57,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:57,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:17:57,043 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 20:17:57,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1301585520, now seen corresponding path program 1 times [2024-06-27 20:17:57,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:57,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709768121] [2024-06-27 20:17:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:57,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:58,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709768121] [2024-06-27 20:17:58,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709768121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:58,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:58,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:58,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882534658] [2024-06-27 20:17:58,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:58,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:58,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:58,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:58,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 660 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 20:17:58,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:58,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:58,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:58,905 INFO L124 PetriNetUnfolderBase]: 2352/3618 cut-off events. [2024-06-27 20:17:58,905 INFO L125 PetriNetUnfolderBase]: For 49575/49577 co-relation queries the response was YES. [2024-06-27 20:17:58,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17813 conditions, 3618 events. 2352/3618 cut-off events. For 49575/49577 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18222 event pairs, 760 based on Foata normal form. 8/3625 useless extension candidates. Maximal degree in co-relation 17779. Up to 3174 conditions per place. [2024-06-27 20:17:58,923 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 87 selfloop transitions, 38 changer transitions 0/130 dead transitions. [2024-06-27 20:17:58,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 130 transitions, 1140 flow [2024-06-27 20:17:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:17:58,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 20:17:58,924 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 660 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:17:58,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 130 transitions, 1140 flow [2024-06-27 20:17:58,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 1038 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:58,953 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 749 flow [2024-06-27 20:17:58,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=749, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-27 20:17:58,954 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-27 20:17:58,954 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 749 flow [2024-06-27 20:17:58,954 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 20:17:58,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:58,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:58,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:17:58,955 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 20:17:58,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1301585303, now seen corresponding path program 2 times [2024-06-27 20:17:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746561519] [2024-06-27 20:17:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:59,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:59,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746561519] [2024-06-27 20:17:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746561519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:59,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:59,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:59,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478429281] [2024-06-27 20:17:59,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:59,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:59,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:00,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:00,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 749 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 20:18:00,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:00,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:00,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:00,561 INFO L124 PetriNetUnfolderBase]: 2363/3634 cut-off events. [2024-06-27 20:18:00,562 INFO L125 PetriNetUnfolderBase]: For 55927/55929 co-relation queries the response was YES. [2024-06-27 20:18:00,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 3634 events. 2363/3634 cut-off events. For 55927/55929 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18303 event pairs, 790 based on Foata normal form. 2/3635 useless extension candidates. Maximal degree in co-relation 18963. Up to 3320 conditions per place. [2024-06-27 20:18:00,590 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 85 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-27 20:18:00,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 126 transitions, 1159 flow [2024-06-27 20:18:00,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:18:00,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:18:00,592 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 749 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:18:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 126 transitions, 1159 flow [2024-06-27 20:18:00,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 1112 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 20:18:00,630 INFO L231 Difference]: Finished difference. Result has 91 places, 102 transitions, 825 flow [2024-06-27 20:18:00,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=825, PETRI_PLACES=91, PETRI_TRANSITIONS=102} [2024-06-27 20:18:00,631 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-27 20:18:00,631 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 102 transitions, 825 flow [2024-06-27 20:18:00,631 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 20:18:00,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:00,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:00,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:18:00,631 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 20:18:00,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash -350419782, now seen corresponding path program 2 times [2024-06-27 20:18:00,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:00,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264441753] [2024-06-27 20:18:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:00,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:01,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:01,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264441753] [2024-06-27 20:18:01,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264441753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:01,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:01,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:01,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415047800] [2024-06-27 20:18:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:01,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:01,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:01,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:01,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:01,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:01,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 825 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 20:18:01,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:01,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:01,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:02,291 INFO L124 PetriNetUnfolderBase]: 2385/3670 cut-off events. [2024-06-27 20:18:02,291 INFO L125 PetriNetUnfolderBase]: For 62099/62099 co-relation queries the response was YES. [2024-06-27 20:18:02,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19503 conditions, 3670 events. 2385/3670 cut-off events. For 62099/62099 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18534 event pairs, 782 based on Foata normal form. 4/3673 useless extension candidates. Maximal degree in co-relation 19464. Up to 3466 conditions per place. [2024-06-27 20:18:02,310 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 107 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2024-06-27 20:18:02,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 129 transitions, 1177 flow [2024-06-27 20:18:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:18:02,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 20:18:02,312 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 825 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:18:02,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 129 transitions, 1177 flow [2024-06-27 20:18:02,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1101 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:02,343 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 839 flow [2024-06-27 20:18:02,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=839, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-27 20:18:02,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-27 20:18:02,344 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 839 flow [2024-06-27 20:18:02,344 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 20:18:02,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:02,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:02,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:18:02,344 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 20:18:02,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1942965446, now seen corresponding path program 3 times [2024-06-27 20:18:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:02,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460020121] [2024-06-27 20:18:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:02,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460020121] [2024-06-27 20:18:03,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460020121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:03,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:03,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586682584] [2024-06-27 20:18:03,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:03,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:03,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:03,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:03,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 839 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 20:18:03,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:03,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:03,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:03,971 INFO L124 PetriNetUnfolderBase]: 2407/3707 cut-off events. [2024-06-27 20:18:03,972 INFO L125 PetriNetUnfolderBase]: For 69226/69226 co-relation queries the response was YES. [2024-06-27 20:18:03,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20125 conditions, 3707 events. 2407/3707 cut-off events. For 69226/69226 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18743 event pairs, 782 based on Foata normal form. 4/3710 useless extension candidates. Maximal degree in co-relation 20085. Up to 3471 conditions per place. [2024-06-27 20:18:03,994 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 106 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-27 20:18:03,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 1209 flow [2024-06-27 20:18:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:18:03,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:18:03,996 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 839 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:18:03,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 1209 flow [2024-06-27 20:18:04,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1141 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:04,022 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 877 flow [2024-06-27 20:18:04,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=877, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-27 20:18:04,023 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-27 20:18:04,023 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 877 flow [2024-06-27 20:18:04,023 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 20:18:04,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:04,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:04,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:18:04,024 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:04,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:04,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1950317096, now seen corresponding path program 4 times [2024-06-27 20:18:04,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:04,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491718210] [2024-06-27 20:18:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:04,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:04,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:04,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491718210] [2024-06-27 20:18:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491718210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:04,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:04,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453728094] [2024-06-27 20:18:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:04,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:04,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:05,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:05,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 877 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 20:18:05,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:05,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:05,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:05,653 INFO L124 PetriNetUnfolderBase]: 2397/3693 cut-off events. [2024-06-27 20:18:05,653 INFO L125 PetriNetUnfolderBase]: For 75215/75215 co-relation queries the response was YES. [2024-06-27 20:18:05,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20405 conditions, 3693 events. 2397/3693 cut-off events. For 75215/75215 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18648 event pairs, 780 based on Foata normal form. 4/3696 useless extension candidates. Maximal degree in co-relation 20365. Up to 3421 conditions per place. [2024-06-27 20:18:05,722 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 29 changer transitions 0/136 dead transitions. [2024-06-27 20:18:05,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 1259 flow [2024-06-27 20:18:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:18:05,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:18:05,724 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 877 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:18:05,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 1259 flow [2024-06-27 20:18:05,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1181 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:05,752 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 925 flow [2024-06-27 20:18:05,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=925, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-27 20:18:05,752 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-27 20:18:05,752 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 925 flow [2024-06-27 20:18:05,753 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 20:18:05,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:05,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:05,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:18:05,753 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 20:18:05,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:05,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1942965663, now seen corresponding path program 3 times [2024-06-27 20:18:05,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:05,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644905839] [2024-06-27 20:18:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:05,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:06,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:06,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644905839] [2024-06-27 20:18:06,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644905839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:06,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:06,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:06,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736178062] [2024-06-27 20:18:06,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:06,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:06,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:06,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:06,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 925 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 20:18:06,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:06,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:06,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:07,313 INFO L124 PetriNetUnfolderBase]: 2392/3687 cut-off events. [2024-06-27 20:18:07,313 INFO L125 PetriNetUnfolderBase]: For 81294/81296 co-relation queries the response was YES. [2024-06-27 20:18:07,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20731 conditions, 3687 events. 2392/3687 cut-off events. For 81294/81296 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18639 event pairs, 784 based on Foata normal form. 4/3690 useless extension candidates. Maximal degree in co-relation 20690. Up to 3486 conditions per place. [2024-06-27 20:18:07,340 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 109 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-27 20:18:07,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 130 transitions, 1223 flow [2024-06-27 20:18:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:18:07,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:18:07,341 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 925 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:18:07,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 130 transitions, 1223 flow [2024-06-27 20:18:07,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1103 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:07,380 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 845 flow [2024-06-27 20:18:07,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-27 20:18:07,380 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-27 20:18:07,380 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 845 flow [2024-06-27 20:18:07,381 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 20:18:07,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:07,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:07,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:18:07,381 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:07,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash 986477248, now seen corresponding path program 1 times [2024-06-27 20:18:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:07,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047907409] [2024-06-27 20:18:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:07,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:08,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:08,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047907409] [2024-06-27 20:18:08,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047907409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:08,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:08,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:08,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641194722] [2024-06-27 20:18:08,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:08,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:18:08,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 845 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:08,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:08,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:18:08,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:08,864 INFO L124 PetriNetUnfolderBase]: 2955/4406 cut-off events. [2024-06-27 20:18:08,864 INFO L125 PetriNetUnfolderBase]: For 113140/113140 co-relation queries the response was YES. [2024-06-27 20:18:08,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25422 conditions, 4406 events. 2955/4406 cut-off events. For 113140/113140 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21469 event pairs, 1046 based on Foata normal form. 1/4406 useless extension candidates. Maximal degree in co-relation 25380. Up to 4306 conditions per place. [2024-06-27 20:18:08,892 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 101 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-27 20:18:08,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 123 transitions, 1119 flow [2024-06-27 20:18:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 20:18:08,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-27 20:18:08,893 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 845 flow. Second operand 6 states and 103 transitions. [2024-06-27 20:18:08,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 123 transitions, 1119 flow [2024-06-27 20:18:08,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 1054 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:08,964 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 842 flow [2024-06-27 20:18:08,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=842, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-27 20:18:08,964 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-27 20:18:08,964 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 842 flow [2024-06-27 20:18:08,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:08,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:08,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:08,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:18:08,965 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 20:18:08,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1126682078, now seen corresponding path program 1 times [2024-06-27 20:18:08,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:08,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386471838] [2024-06-27 20:18:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:10,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386471838] [2024-06-27 20:18:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386471838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:10,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:10,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767111124] [2024-06-27 20:18:10,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:10,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:10,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:10,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:10,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:10,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 842 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:10,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:10,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:10,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:10,964 INFO L124 PetriNetUnfolderBase]: 2354/3677 cut-off events. [2024-06-27 20:18:10,964 INFO L125 PetriNetUnfolderBase]: For 107446/107448 co-relation queries the response was YES. [2024-06-27 20:18:10,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22319 conditions, 3677 events. 2354/3677 cut-off events. For 107446/107448 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19216 event pairs, 572 based on Foata normal form. 6/3682 useless extension candidates. Maximal degree in co-relation 22276. Up to 3199 conditions per place. [2024-06-27 20:18:10,988 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-06-27 20:18:10,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 1350 flow [2024-06-27 20:18:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 20:18:10,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-27 20:18:10,989 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 842 flow. Second operand 8 states and 169 transitions. [2024-06-27 20:18:10,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 1350 flow [2024-06-27 20:18:11,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 151 transitions, 1310 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:11,034 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 935 flow [2024-06-27 20:18:11,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2024-06-27 20:18:11,035 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-27 20:18:11,035 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 935 flow [2024-06-27 20:18:11,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:11,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:11,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:11,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:18:11,036 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 20:18:11,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1126742528, now seen corresponding path program 2 times [2024-06-27 20:18:11,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:11,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542364917] [2024-06-27 20:18:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542364917] [2024-06-27 20:18:12,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542364917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:12,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:12,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:12,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605759100] [2024-06-27 20:18:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:12,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:12,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:12,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:12,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 118 transitions, 935 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:12,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:12,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:12,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:12,961 INFO L124 PetriNetUnfolderBase]: 2382/3720 cut-off events. [2024-06-27 20:18:12,961 INFO L125 PetriNetUnfolderBase]: For 116911/116913 co-relation queries the response was YES. [2024-06-27 20:18:12,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23188 conditions, 3720 events. 2382/3720 cut-off events. For 116911/116913 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19457 event pairs, 733 based on Foata normal form. 6/3725 useless extension candidates. Maximal degree in co-relation 23144. Up to 3315 conditions per place. [2024-06-27 20:18:12,983 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 111 selfloop transitions, 28 changer transitions 0/153 dead transitions. [2024-06-27 20:18:12,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 153 transitions, 1343 flow [2024-06-27 20:18:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:18:12,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 20:18:12,986 INFO L175 Difference]: Start difference. First operand has 103 places, 118 transitions, 935 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:18:12,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 153 transitions, 1343 flow [2024-06-27 20:18:13,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 153 transitions, 1269 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:13,061 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 982 flow [2024-06-27 20:18:13,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=982, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-06-27 20:18:13,062 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-27 20:18:13,062 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 982 flow [2024-06-27 20:18:13,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:13,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:13,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:13,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:18:13,063 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 20:18:13,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1126742652, now seen corresponding path program 1 times [2024-06-27 20:18:13,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:13,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816636981] [2024-06-27 20:18:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:13,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:14,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:14,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816636981] [2024-06-27 20:18:14,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816636981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:14,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:14,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:14,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134027774] [2024-06-27 20:18:14,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:14,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:14,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:14,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:14,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:14,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 982 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 20:18:14,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:14,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:14,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:14,886 INFO L124 PetriNetUnfolderBase]: 2526/3869 cut-off events. [2024-06-27 20:18:14,886 INFO L125 PetriNetUnfolderBase]: For 125084/125086 co-relation queries the response was YES. [2024-06-27 20:18:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24168 conditions, 3869 events. 2526/3869 cut-off events. For 125084/125086 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19671 event pairs, 766 based on Foata normal form. 2/3870 useless extension candidates. Maximal degree in co-relation 24122. Up to 3442 conditions per place. [2024-06-27 20:18:14,911 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 109 selfloop transitions, 45 changer transitions 0/160 dead transitions. [2024-06-27 20:18:14,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 160 transitions, 1536 flow [2024-06-27 20:18:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:18:14,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:18:14,913 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 982 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:18:14,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 160 transitions, 1536 flow [2024-06-27 20:18:14,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 160 transitions, 1476 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:14,969 INFO L231 Difference]: Finished difference. Result has 111 places, 129 transitions, 1098 flow [2024-06-27 20:18:14,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=111, PETRI_TRANSITIONS=129} [2024-06-27 20:18:14,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-27 20:18:14,970 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 129 transitions, 1098 flow [2024-06-27 20:18:14,970 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 20:18:14,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:14,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:14,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:18:14,971 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:14,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1129543812, now seen corresponding path program 2 times [2024-06-27 20:18:14,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:14,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070231589] [2024-06-27 20:18:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:14,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:16,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:16,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070231589] [2024-06-27 20:18:16,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070231589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:16,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:16,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369459872] [2024-06-27 20:18:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:16,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:16,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:16,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 129 transitions, 1098 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 20:18:16,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:16,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:16,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:16,871 INFO L124 PetriNetUnfolderBase]: 2537/3885 cut-off events. [2024-06-27 20:18:16,871 INFO L125 PetriNetUnfolderBase]: For 135006/135008 co-relation queries the response was YES. [2024-06-27 20:18:16,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24988 conditions, 3885 events. 2537/3885 cut-off events. For 135006/135008 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19778 event pairs, 766 based on Foata normal form. 2/3886 useless extension candidates. Maximal degree in co-relation 24941. Up to 3536 conditions per place. [2024-06-27 20:18:16,895 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 113 selfloop transitions, 39 changer transitions 0/158 dead transitions. [2024-06-27 20:18:16,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 158 transitions, 1510 flow [2024-06-27 20:18:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:18:16,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:18:16,898 INFO L175 Difference]: Start difference. First operand has 111 places, 129 transitions, 1098 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:18:16,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 158 transitions, 1510 flow [2024-06-27 20:18:16,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 158 transitions, 1425 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:16,958 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 1147 flow [2024-06-27 20:18:16,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1147, PETRI_PLACES=115, PETRI_TRANSITIONS=132} [2024-06-27 20:18:16,959 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-27 20:18:16,959 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 1147 flow [2024-06-27 20:18:16,959 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 20:18:16,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:16,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:16,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:18:16,960 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 20:18:16,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1129539038, now seen corresponding path program 3 times [2024-06-27 20:18:16,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:16,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941466089] [2024-06-27 20:18:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:16,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:18,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941466089] [2024-06-27 20:18:18,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941466089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:18,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:18,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449922920] [2024-06-27 20:18:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:18,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:18,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:18,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 132 transitions, 1147 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:18,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:18,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:18,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:18,859 INFO L124 PetriNetUnfolderBase]: 2402/3746 cut-off events. [2024-06-27 20:18:18,859 INFO L125 PetriNetUnfolderBase]: For 143357/143359 co-relation queries the response was YES. [2024-06-27 20:18:18,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24654 conditions, 3746 events. 2402/3746 cut-off events. For 143357/143359 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19530 event pairs, 725 based on Foata normal form. 6/3751 useless extension candidates. Maximal degree in co-relation 24605. Up to 3363 conditions per place. [2024-06-27 20:18:18,884 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 118 selfloop transitions, 24 changer transitions 0/159 dead transitions. [2024-06-27 20:18:18,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 159 transitions, 1499 flow [2024-06-27 20:18:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:18:18,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 20:18:18,885 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 1147 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:18:18,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 159 transitions, 1499 flow [2024-06-27 20:18:18,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 159 transitions, 1387 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:18,949 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 1090 flow [2024-06-27 20:18:18,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1090, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2024-06-27 20:18:18,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-27 20:18:18,950 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 1090 flow [2024-06-27 20:18:18,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:18,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:18,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:18,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:18:18,951 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 20:18:18,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1578971330, now seen corresponding path program 3 times [2024-06-27 20:18:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:18,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529789162] [2024-06-27 20:18:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:20,001 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 20:18:20,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:20,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529789162] [2024-06-27 20:18:20,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529789162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:20,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:20,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:20,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379233759] [2024-06-27 20:18:20,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:20,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:20,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:20,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:20,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:20,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:20,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 1090 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 20:18:20,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:20,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:20,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:20,776 INFO L124 PetriNetUnfolderBase]: 2540/3889 cut-off events. [2024-06-27 20:18:20,777 INFO L125 PetriNetUnfolderBase]: For 151969/151971 co-relation queries the response was YES. [2024-06-27 20:18:20,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25596 conditions, 3889 events. 2540/3889 cut-off events. For 151969/151971 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19804 event pairs, 764 based on Foata normal form. 2/3890 useless extension candidates. Maximal degree in co-relation 25546. Up to 3522 conditions per place. [2024-06-27 20:18:20,804 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 111 selfloop transitions, 44 changer transitions 0/161 dead transitions. [2024-06-27 20:18:20,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 161 transitions, 1506 flow [2024-06-27 20:18:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:18:20,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:20,806 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 1090 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:18:20,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 161 transitions, 1506 flow [2024-06-27 20:18:20,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 1430 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:20,886 INFO L231 Difference]: Finished difference. Result has 117 places, 135 transitions, 1156 flow [2024-06-27 20:18:20,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1156, PETRI_PLACES=117, PETRI_TRANSITIONS=135} [2024-06-27 20:18:20,887 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-27 20:18:20,887 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 135 transitions, 1156 flow [2024-06-27 20:18:20,887 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 20:18:20,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:20,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:20,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:18:20,888 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 20:18:20,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:20,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1694262500, now seen corresponding path program 4 times [2024-06-27 20:18:20,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:20,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515768515] [2024-06-27 20:18:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:20,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:21,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:21,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515768515] [2024-06-27 20:18:21,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515768515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:21,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:21,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369296687] [2024-06-27 20:18:21,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:21,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:21,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:22,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:22,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 135 transitions, 1156 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 20:18:22,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:22,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:22,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:22,685 INFO L124 PetriNetUnfolderBase]: 2551/3905 cut-off events. [2024-06-27 20:18:22,685 INFO L125 PetriNetUnfolderBase]: For 161822/161824 co-relation queries the response was YES. [2024-06-27 20:18:22,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26071 conditions, 3905 events. 2551/3905 cut-off events. For 161822/161824 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19851 event pairs, 764 based on Foata normal form. 2/3906 useless extension candidates. Maximal degree in co-relation 26020. Up to 3511 conditions per place. [2024-06-27 20:18:22,714 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 118 selfloop transitions, 48 changer transitions 0/172 dead transitions. [2024-06-27 20:18:22,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 172 transitions, 1732 flow [2024-06-27 20:18:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 20:18:22,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-27 20:18:22,716 INFO L175 Difference]: Start difference. First operand has 117 places, 135 transitions, 1156 flow. Second operand 8 states and 169 transitions. [2024-06-27 20:18:22,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 172 transitions, 1732 flow [2024-06-27 20:18:22,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 172 transitions, 1620 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:22,799 INFO L231 Difference]: Finished difference. Result has 119 places, 138 transitions, 1194 flow [2024-06-27 20:18:22,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1194, PETRI_PLACES=119, PETRI_TRANSITIONS=138} [2024-06-27 20:18:22,800 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-27 20:18:22,800 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 138 transitions, 1194 flow [2024-06-27 20:18:22,800 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 20:18:22,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:22,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:22,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:18:22,801 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:22,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1694267150, now seen corresponding path program 5 times [2024-06-27 20:18:22,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:22,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227137549] [2024-06-27 20:18:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:22,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:23,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:23,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227137549] [2024-06-27 20:18:23,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227137549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:23,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:23,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440261421] [2024-06-27 20:18:23,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:23,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:23,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:23,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:23,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:23,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 138 transitions, 1194 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 20:18:23,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:23,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:23,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:24,691 INFO L124 PetriNetUnfolderBase]: 2562/3921 cut-off events. [2024-06-27 20:18:24,692 INFO L125 PetriNetUnfolderBase]: For 171891/171893 co-relation queries the response was YES. [2024-06-27 20:18:24,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26539 conditions, 3921 events. 2562/3921 cut-off events. For 171891/171893 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19926 event pairs, 764 based on Foata normal form. 2/3922 useless extension candidates. Maximal degree in co-relation 26487. Up to 3572 conditions per place. [2024-06-27 20:18:24,717 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 122 selfloop transitions, 42 changer transitions 0/170 dead transitions. [2024-06-27 20:18:24,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 170 transitions, 1648 flow [2024-06-27 20:18:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:18:24,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 20:18:24,719 INFO L175 Difference]: Start difference. First operand has 119 places, 138 transitions, 1194 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:18:24,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 170 transitions, 1648 flow [2024-06-27 20:18:24,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 170 transitions, 1504 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:24,797 INFO L231 Difference]: Finished difference. Result has 121 places, 141 transitions, 1200 flow [2024-06-27 20:18:24,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1200, PETRI_PLACES=121, PETRI_TRANSITIONS=141} [2024-06-27 20:18:24,798 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-27 20:18:24,798 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 141 transitions, 1200 flow [2024-06-27 20:18:24,798 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 20:18:24,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:24,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:24,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:18:24,798 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:24,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1244835168, now seen corresponding path program 1 times [2024-06-27 20:18:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:24,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918717153] [2024-06-27 20:18:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:24,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:25,749 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 20:18:25,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:25,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918717153] [2024-06-27 20:18:25,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918717153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:25,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:25,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144512297] [2024-06-27 20:18:25,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:25,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:25,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:25,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 141 transitions, 1200 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 20:18:25,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:25,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:25,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:26,496 INFO L124 PetriNetUnfolderBase]: 2584/3958 cut-off events. [2024-06-27 20:18:26,496 INFO L125 PetriNetUnfolderBase]: For 183494/183496 co-relation queries the response was YES. [2024-06-27 20:18:26,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26985 conditions, 3958 events. 2584/3958 cut-off events. For 183494/183496 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20162 event pairs, 732 based on Foata normal form. 4/3961 useless extension candidates. Maximal degree in co-relation 26932. Up to 3427 conditions per place. [2024-06-27 20:18:26,520 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 117 selfloop transitions, 55 changer transitions 0/178 dead transitions. [2024-06-27 20:18:26,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 178 transitions, 1802 flow [2024-06-27 20:18:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 20:18:26,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-27 20:18:26,521 INFO L175 Difference]: Start difference. First operand has 121 places, 141 transitions, 1200 flow. Second operand 8 states and 170 transitions. [2024-06-27 20:18:26,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 178 transitions, 1802 flow [2024-06-27 20:18:26,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 178 transitions, 1688 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:26,609 INFO L231 Difference]: Finished difference. Result has 123 places, 144 transitions, 1252 flow [2024-06-27 20:18:26,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1252, PETRI_PLACES=123, PETRI_TRANSITIONS=144} [2024-06-27 20:18:26,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-27 20:18:26,610 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 144 transitions, 1252 flow [2024-06-27 20:18:26,610 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 20:18:26,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:26,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:26,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:18:26,611 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:26,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:26,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1245008148, now seen corresponding path program 2 times [2024-06-27 20:18:26,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:26,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148071312] [2024-06-27 20:18:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:26,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:27,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:27,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148071312] [2024-06-27 20:18:27,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148071312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:27,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:27,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090751845] [2024-06-27 20:18:27,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:27,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:27,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:27,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 144 transitions, 1252 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 20:18:27,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:27,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:27,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:28,312 INFO L124 PetriNetUnfolderBase]: 2638/4036 cut-off events. [2024-06-27 20:18:28,312 INFO L125 PetriNetUnfolderBase]: For 197099/197101 co-relation queries the response was YES. [2024-06-27 20:18:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28011 conditions, 4036 events. 2638/4036 cut-off events. For 197099/197101 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20662 event pairs, 737 based on Foata normal form. 4/4039 useless extension candidates. Maximal degree in co-relation 27957. Up to 3473 conditions per place. [2024-06-27 20:18:28,339 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 122 selfloop transitions, 56 changer transitions 0/184 dead transitions. [2024-06-27 20:18:28,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 2054 flow [2024-06-27 20:18:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 20:18:28,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-27 20:18:28,341 INFO L175 Difference]: Start difference. First operand has 123 places, 144 transitions, 1252 flow. Second operand 8 states and 170 transitions. [2024-06-27 20:18:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 2054 flow [2024-06-27 20:18:28,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 184 transitions, 1888 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:28,425 INFO L231 Difference]: Finished difference. Result has 125 places, 150 transitions, 1314 flow [2024-06-27 20:18:28,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=125, PETRI_TRANSITIONS=150} [2024-06-27 20:18:28,426 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-27 20:18:28,426 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 150 transitions, 1314 flow [2024-06-27 20:18:28,426 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 20:18:28,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:28,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:28,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:18:28,426 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 20:18:28,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1245014658, now seen corresponding path program 3 times [2024-06-27 20:18:28,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:28,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399799325] [2024-06-27 20:18:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:28,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:29,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:29,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399799325] [2024-06-27 20:18:29,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399799325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:29,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:29,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:29,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435538773] [2024-06-27 20:18:29,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:29,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:29,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:29,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:29,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:29,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:29,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 1314 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 20:18:29,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:29,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:29,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:30,123 INFO L124 PetriNetUnfolderBase]: 2628/4022 cut-off events. [2024-06-27 20:18:30,123 INFO L125 PetriNetUnfolderBase]: For 205596/205598 co-relation queries the response was YES. [2024-06-27 20:18:30,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28077 conditions, 4022 events. 2628/4022 cut-off events. For 205596/205598 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20575 event pairs, 737 based on Foata normal form. 4/4025 useless extension candidates. Maximal degree in co-relation 28022. Up to 3465 conditions per place. [2024-06-27 20:18:30,149 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 118 selfloop transitions, 57 changer transitions 0/181 dead transitions. [2024-06-27 20:18:30,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 181 transitions, 1874 flow [2024-06-27 20:18:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:18:30,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 20:18:30,151 INFO L175 Difference]: Start difference. First operand has 125 places, 150 transitions, 1314 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:18:30,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 181 transitions, 1874 flow [2024-06-27 20:18:30,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 181 transitions, 1731 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:30,237 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1294 flow [2024-06-27 20:18:30,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1294, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-27 20:18:30,237 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-27 20:18:30,238 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1294 flow [2024-06-27 20:18:30,238 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 20:18:30,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:30,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:30,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:18:30,238 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 20:18:30,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1245007962, now seen corresponding path program 6 times [2024-06-27 20:18:30,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:30,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502037231] [2024-06-27 20:18:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:30,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:31,382 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 20:18:31,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:31,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502037231] [2024-06-27 20:18:31,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502037231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:31,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:31,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131032129] [2024-06-27 20:18:31,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:31,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:31,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:31,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:31,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:31,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:31,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1294 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 20:18:31,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:31,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:31,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:32,209 INFO L124 PetriNetUnfolderBase]: 2639/4038 cut-off events. [2024-06-27 20:18:32,210 INFO L125 PetriNetUnfolderBase]: For 215723/215725 co-relation queries the response was YES. [2024-06-27 20:18:32,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28458 conditions, 4038 events. 2639/4038 cut-off events. For 215723/215725 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20667 event pairs, 774 based on Foata normal form. 2/4039 useless extension candidates. Maximal degree in co-relation 28402. Up to 3684 conditions per place. [2024-06-27 20:18:32,238 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 134 selfloop transitions, 39 changer transitions 0/179 dead transitions. [2024-06-27 20:18:32,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 179 transitions, 1758 flow [2024-06-27 20:18:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:18:32,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:18:32,239 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1294 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:18:32,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 179 transitions, 1758 flow [2024-06-27 20:18:32,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 1635 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:32,352 INFO L231 Difference]: Finished difference. Result has 130 places, 153 transitions, 1315 flow [2024-06-27 20:18:32,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1315, PETRI_PLACES=130, PETRI_TRANSITIONS=153} [2024-06-27 20:18:32,353 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-27 20:18:32,353 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 153 transitions, 1315 flow [2024-06-27 20:18:32,353 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 20:18:32,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:32,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:32,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:18:32,353 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:32,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -854899131, now seen corresponding path program 1 times [2024-06-27 20:18:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:32,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243643197] [2024-06-27 20:18:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:32,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:33,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:33,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243643197] [2024-06-27 20:18:33,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243643197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:33,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:33,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:33,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909263750] [2024-06-27 20:18:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:33,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:33,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:33,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:33,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:33,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 153 transitions, 1315 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:33,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:33,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:33,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:33,820 INFO L124 PetriNetUnfolderBase]: 2970/4519 cut-off events. [2024-06-27 20:18:33,820 INFO L125 PetriNetUnfolderBase]: For 258010/258010 co-relation queries the response was YES. [2024-06-27 20:18:33,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31983 conditions, 4519 events. 2970/4519 cut-off events. For 258010/258010 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 22781 event pairs, 933 based on Foata normal form. 1/4519 useless extension candidates. Maximal degree in co-relation 31926. Up to 4218 conditions per place. [2024-06-27 20:18:33,853 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 139 selfloop transitions, 16 changer transitions 0/175 dead transitions. [2024-06-27 20:18:33,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 175 transitions, 1815 flow [2024-06-27 20:18:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-27 20:18:33,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:18:33,854 INFO L175 Difference]: Start difference. First operand has 130 places, 153 transitions, 1315 flow. Second operand 6 states and 117 transitions. [2024-06-27 20:18:33,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 175 transitions, 1815 flow [2024-06-27 20:18:33,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1701 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:33,960 INFO L231 Difference]: Finished difference. Result has 130 places, 159 transitions, 1325 flow [2024-06-27 20:18:33,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=130, PETRI_TRANSITIONS=159} [2024-06-27 20:18:33,961 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-27 20:18:33,961 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 159 transitions, 1325 flow [2024-06-27 20:18:33,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:33,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:33,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:33,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:18:33,962 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 20:18:33,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash -102385312, now seen corresponding path program 4 times [2024-06-27 20:18:33,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:33,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699930206] [2024-06-27 20:18:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:33,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699930206] [2024-06-27 20:18:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699930206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:34,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:34,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780043823] [2024-06-27 20:18:34,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:34,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:34,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 159 transitions, 1325 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 20:18:34,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:34,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:34,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:35,647 INFO L124 PetriNetUnfolderBase]: 2729/4159 cut-off events. [2024-06-27 20:18:35,647 INFO L125 PetriNetUnfolderBase]: For 244125/244127 co-relation queries the response was YES. [2024-06-27 20:18:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30010 conditions, 4159 events. 2729/4159 cut-off events. For 244125/244127 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 21166 event pairs, 775 based on Foata normal form. 6/4164 useless extension candidates. Maximal degree in co-relation 29952. Up to 3809 conditions per place. [2024-06-27 20:18:35,675 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 158 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-06-27 20:18:35,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 2159 flow [2024-06-27 20:18:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:18:35,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-27 20:18:35,676 INFO L175 Difference]: Start difference. First operand has 130 places, 159 transitions, 1325 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:18:35,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 2159 flow [2024-06-27 20:18:35,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 195 transitions, 2117 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 20:18:35,777 INFO L231 Difference]: Finished difference. Result has 136 places, 165 transitions, 1455 flow [2024-06-27 20:18:35,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1455, PETRI_PLACES=136, PETRI_TRANSITIONS=165} [2024-06-27 20:18:35,777 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-27 20:18:35,778 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 165 transitions, 1455 flow [2024-06-27 20:18:35,778 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 20:18:35,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:35,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:35,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:18:35,778 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:35,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2013609110, now seen corresponding path program 7 times [2024-06-27 20:18:35,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:35,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688032371] [2024-06-27 20:18:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:35,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:36,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:36,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688032371] [2024-06-27 20:18:36,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688032371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:36,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:36,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:36,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367613797] [2024-06-27 20:18:36,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:36,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:36,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:37,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:37,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 165 transitions, 1455 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 20:18:37,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:37,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:37,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:37,887 INFO L124 PetriNetUnfolderBase]: 2724/4152 cut-off events. [2024-06-27 20:18:37,887 INFO L125 PetriNetUnfolderBase]: For 254630/254632 co-relation queries the response was YES. [2024-06-27 20:18:37,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30380 conditions, 4152 events. 2724/4152 cut-off events. For 254630/254632 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 21157 event pairs, 780 based on Foata normal form. 4/4155 useless extension candidates. Maximal degree in co-relation 30320. Up to 3914 conditions per place. [2024-06-27 20:18:37,917 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 163 selfloop transitions, 19 changer transitions 0/188 dead transitions. [2024-06-27 20:18:37,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 1877 flow [2024-06-27 20:18:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:18:37,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 20:18:37,919 INFO L175 Difference]: Start difference. First operand has 136 places, 165 transitions, 1455 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:18:37,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 1877 flow [2024-06-27 20:18:38,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 188 transitions, 1734 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:38,077 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1358 flow [2024-06-27 20:18:38,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-27 20:18:38,077 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-27 20:18:38,077 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1358 flow [2024-06-27 20:18:38,078 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 20:18:38,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:38,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:38,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:18:38,078 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 20:18:38,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2013609296, now seen corresponding path program 5 times [2024-06-27 20:18:38,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:38,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566435338] [2024-06-27 20:18:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:38,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:38,941 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 20:18:38,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:38,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566435338] [2024-06-27 20:18:38,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566435338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:38,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:38,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:38,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237004471] [2024-06-27 20:18:38,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:38,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:38,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:38,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:39,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:39,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1358 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 20:18:39,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:39,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:39,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:39,851 INFO L124 PetriNetUnfolderBase]: 2714/4138 cut-off events. [2024-06-27 20:18:39,851 INFO L125 PetriNetUnfolderBase]: For 264588/264590 co-relation queries the response was YES. [2024-06-27 20:18:39,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30247 conditions, 4138 events. 2714/4138 cut-off events. For 264588/264590 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21107 event pairs, 766 based on Foata normal form. 6/4143 useless extension candidates. Maximal degree in co-relation 30186. Up to 3794 conditions per place. [2024-06-27 20:18:39,878 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 155 selfloop transitions, 32 changer transitions 0/193 dead transitions. [2024-06-27 20:18:39,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 193 transitions, 1952 flow [2024-06-27 20:18:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:18:39,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:18:39,879 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1358 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:18:39,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 193 transitions, 1952 flow [2024-06-27 20:18:40,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 193 transitions, 1859 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:40,036 INFO L231 Difference]: Finished difference. Result has 140 places, 165 transitions, 1337 flow [2024-06-27 20:18:40,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1337, PETRI_PLACES=140, PETRI_TRANSITIONS=165} [2024-06-27 20:18:40,037 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-27 20:18:40,037 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 165 transitions, 1337 flow [2024-06-27 20:18:40,037 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 20:18:40,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:40,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:40,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:18:40,038 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 20:18:40,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2021890016, now seen corresponding path program 6 times [2024-06-27 20:18:40,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:40,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051210401] [2024-06-27 20:18:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:40,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:40,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:40,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051210401] [2024-06-27 20:18:40,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051210401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:40,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:40,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:40,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447035032] [2024-06-27 20:18:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:40,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:40,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:40,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:40,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 165 transitions, 1337 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 20:18:40,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:40,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:40,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:41,667 INFO L124 PetriNetUnfolderBase]: 2704/4124 cut-off events. [2024-06-27 20:18:41,667 INFO L125 PetriNetUnfolderBase]: For 274581/274583 co-relation queries the response was YES. [2024-06-27 20:18:41,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30363 conditions, 4124 events. 2704/4124 cut-off events. For 274581/274583 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 21023 event pairs, 771 based on Foata normal form. 6/4129 useless extension candidates. Maximal degree in co-relation 30301. Up to 3863 conditions per place. [2024-06-27 20:18:41,699 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 165 selfloop transitions, 19 changer transitions 0/190 dead transitions. [2024-06-27 20:18:41,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 190 transitions, 1771 flow [2024-06-27 20:18:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:18:41,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:18:41,700 INFO L175 Difference]: Start difference. First operand has 140 places, 165 transitions, 1337 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:18:41,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 190 transitions, 1771 flow [2024-06-27 20:18:41,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 1650 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:41,952 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 1262 flow [2024-06-27 20:18:41,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1262, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2024-06-27 20:18:41,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-27 20:18:41,953 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 1262 flow [2024-06-27 20:18:41,953 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 20:18:41,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:41,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:41,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:18:41,954 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:41,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:41,954 INFO L85 PathProgramCache]: Analyzing trace with hash 516009219, now seen corresponding path program 2 times [2024-06-27 20:18:41,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:41,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099449324] [2024-06-27 20:18:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:41,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:42,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:42,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099449324] [2024-06-27 20:18:42,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099449324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:42,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:42,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:42,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905495363] [2024-06-27 20:18:42,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:42,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:42,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:42,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:42,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:42,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 1262 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:42,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:42,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:42,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:43,439 INFO L124 PetriNetUnfolderBase]: 3009/4579 cut-off events. [2024-06-27 20:18:43,440 INFO L125 PetriNetUnfolderBase]: For 323983/323983 co-relation queries the response was YES. [2024-06-27 20:18:43,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33791 conditions, 4579 events. 3009/4579 cut-off events. For 323983/323983 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23095 event pairs, 938 based on Foata normal form. 1/4579 useless extension candidates. Maximal degree in co-relation 33728. Up to 4299 conditions per place. [2024-06-27 20:18:43,475 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 143 selfloop transitions, 11 changer transitions 0/174 dead transitions. [2024-06-27 20:18:43,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 174 transitions, 1592 flow [2024-06-27 20:18:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:18:43,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 20:18:43,476 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 1262 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:18:43,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 174 transitions, 1592 flow [2024-06-27 20:18:43,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 174 transitions, 1502 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:43,689 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1200 flow [2024-06-27 20:18:43,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1200, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-27 20:18:43,690 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-27 20:18:43,690 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1200 flow [2024-06-27 20:18:43,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:43,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:43,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:43,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:18:43,690 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 20:18:43,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash -849179259, now seen corresponding path program 1 times [2024-06-27 20:18:43,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:43,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978661827] [2024-06-27 20:18:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:44,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:44,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978661827] [2024-06-27 20:18:44,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978661827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:44,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:44,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480425877] [2024-06-27 20:18:44,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:44,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:44,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:44,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1200 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:44,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:44,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:44,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:45,300 INFO L124 PetriNetUnfolderBase]: 3014/4586 cut-off events. [2024-06-27 20:18:45,301 INFO L125 PetriNetUnfolderBase]: For 338212/338212 co-relation queries the response was YES. [2024-06-27 20:18:45,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34034 conditions, 4586 events. 3014/4586 cut-off events. For 338212/338212 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23119 event pairs, 938 based on Foata normal form. 1/4586 useless extension candidates. Maximal degree in co-relation 33970. Up to 4293 conditions per place. [2024-06-27 20:18:45,343 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 148 selfloop transitions, 16 changer transitions 0/184 dead transitions. [2024-06-27 20:18:45,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 184 transitions, 1706 flow [2024-06-27 20:18:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 20:18:45,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:18:45,344 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1200 flow. Second operand 6 states and 114 transitions. [2024-06-27 20:18:45,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 184 transitions, 1706 flow [2024-06-27 20:18:45,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 184 transitions, 1674 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:45,481 INFO L231 Difference]: Finished difference. Result has 140 places, 171 transitions, 1276 flow [2024-06-27 20:18:45,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1276, PETRI_PLACES=140, PETRI_TRANSITIONS=171} [2024-06-27 20:18:45,481 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-27 20:18:45,482 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 171 transitions, 1276 flow [2024-06-27 20:18:45,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:45,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:45,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:45,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:18:45,483 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 20:18:45,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash 561883701, now seen corresponding path program 2 times [2024-06-27 20:18:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:45,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905355964] [2024-06-27 20:18:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:46,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:46,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905355964] [2024-06-27 20:18:46,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905355964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:46,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:46,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:46,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993561679] [2024-06-27 20:18:46,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:46,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:46,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:46,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 171 transitions, 1276 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:46,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:46,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:46,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:47,230 INFO L124 PetriNetUnfolderBase]: 3011/4583 cut-off events. [2024-06-27 20:18:47,230 INFO L125 PetriNetUnfolderBase]: For 353892/353894 co-relation queries the response was YES. [2024-06-27 20:18:47,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34758 conditions, 4583 events. 3011/4583 cut-off events. For 353892/353894 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23095 event pairs, 941 based on Foata normal form. 3/4585 useless extension candidates. Maximal degree in co-relation 34693. Up to 4290 conditions per place. [2024-06-27 20:18:47,263 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 144 selfloop transitions, 16 changer transitions 0/180 dead transitions. [2024-06-27 20:18:47,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 180 transitions, 1618 flow [2024-06-27 20:18:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:18:47,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:18:47,264 INFO L175 Difference]: Start difference. First operand has 140 places, 171 transitions, 1276 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:18:47,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 180 transitions, 1618 flow [2024-06-27 20:18:47,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 180 transitions, 1562 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 20:18:47,430 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1258 flow [2024-06-27 20:18:47,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1258, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-27 20:18:47,431 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 99 predicate places. [2024-06-27 20:18:47,431 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1258 flow [2024-06-27 20:18:47,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:47,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:47,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:47,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:18:47,431 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 20:18:47,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:47,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2022197846, now seen corresponding path program 1 times [2024-06-27 20:18:47,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:47,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956960871] [2024-06-27 20:18:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:47,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:48,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:48,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956960871] [2024-06-27 20:18:48,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956960871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:48,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:48,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549624326] [2024-06-27 20:18:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:48,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:48,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:18:48,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1258 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:48,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:48,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:18:48,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:49,999 INFO L124 PetriNetUnfolderBase]: 3135/4702 cut-off events. [2024-06-27 20:18:50,000 INFO L125 PetriNetUnfolderBase]: For 367391/367391 co-relation queries the response was YES. [2024-06-27 20:18:50,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35362 conditions, 4702 events. 3135/4702 cut-off events. For 367391/367391 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23139 event pairs, 921 based on Foata normal form. 4/4705 useless extension candidates. Maximal degree in co-relation 35295. Up to 4484 conditions per place. [2024-06-27 20:18:50,051 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 178 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-06-27 20:18:50,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 204 transitions, 1783 flow [2024-06-27 20:18:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:18:50,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-27 20:18:50,052 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1258 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:18:50,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 204 transitions, 1783 flow [2024-06-27 20:18:50,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 204 transitions, 1735 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:50,269 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1326 flow [2024-06-27 20:18:50,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1326, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-27 20:18:50,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-27 20:18:50,270 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1326 flow [2024-06-27 20:18:50,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:50,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:50,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:50,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:18:50,270 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 20:18:50,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash -841550779, now seen corresponding path program 1 times [2024-06-27 20:18:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:50,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771682926] [2024-06-27 20:18:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:50,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:50,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:50,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771682926] [2024-06-27 20:18:50,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771682926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:50,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:50,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427105980] [2024-06-27 20:18:50,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:50,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:50,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:51,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:18:51,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1326 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:51,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:51,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:18:51,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:51,942 INFO L124 PetriNetUnfolderBase]: 3192/4756 cut-off events. [2024-06-27 20:18:51,942 INFO L125 PetriNetUnfolderBase]: For 380597/380597 co-relation queries the response was YES. [2024-06-27 20:18:51,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36301 conditions, 4756 events. 3192/4756 cut-off events. For 380597/380597 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23036 event pairs, 981 based on Foata normal form. 3/4758 useless extension candidates. Maximal degree in co-relation 36233. Up to 4614 conditions per place. [2024-06-27 20:18:51,982 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 159 selfloop transitions, 14 changer transitions 0/191 dead transitions. [2024-06-27 20:18:51,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 191 transitions, 1736 flow [2024-06-27 20:18:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:18:51,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-27 20:18:51,984 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1326 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:18:51,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 191 transitions, 1736 flow [2024-06-27 20:18:52,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 191 transitions, 1663 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:52,154 INFO L231 Difference]: Finished difference. Result has 149 places, 179 transitions, 1329 flow [2024-06-27 20:18:52,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1329, PETRI_PLACES=149, PETRI_TRANSITIONS=179} [2024-06-27 20:18:52,155 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 104 predicate places. [2024-06-27 20:18:52,155 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 179 transitions, 1329 flow [2024-06-27 20:18:52,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:52,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:52,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:18:52,155 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:52,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:52,156 INFO L85 PathProgramCache]: Analyzing trace with hash 567407606, now seen corresponding path program 1 times [2024-06-27 20:18:52,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:52,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291962508] [2024-06-27 20:18:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:53,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:53,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291962508] [2024-06-27 20:18:53,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291962508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:53,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:53,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:53,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329919488] [2024-06-27 20:18:53,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:53,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:53,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:53,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:53,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:53,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 179 transitions, 1329 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 20:18:53,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:53,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:53,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:54,451 INFO L124 PetriNetUnfolderBase]: 2980/4533 cut-off events. [2024-06-27 20:18:54,452 INFO L125 PetriNetUnfolderBase]: For 388544/388546 co-relation queries the response was YES. [2024-06-27 20:18:54,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35755 conditions, 4533 events. 2980/4533 cut-off events. For 388544/388546 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 23158 event pairs, 655 based on Foata normal form. 4/4526 useless extension candidates. Maximal degree in co-relation 35686. Up to 3845 conditions per place. [2024-06-27 20:18:54,489 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 146 selfloop transitions, 68 changer transitions 0/221 dead transitions. [2024-06-27 20:18:54,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 221 transitions, 2089 flow [2024-06-27 20:18:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 20:18:54,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 20:18:54,491 INFO L175 Difference]: Start difference. First operand has 149 places, 179 transitions, 1329 flow. Second operand 9 states and 183 transitions. [2024-06-27 20:18:54,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 221 transitions, 2089 flow [2024-06-27 20:18:54,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 221 transitions, 2035 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:54,764 INFO L231 Difference]: Finished difference. Result has 153 places, 183 transitions, 1494 flow [2024-06-27 20:18:54,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1494, PETRI_PLACES=153, PETRI_TRANSITIONS=183} [2024-06-27 20:18:54,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-27 20:18:54,765 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 183 transitions, 1494 flow [2024-06-27 20:18:54,765 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 20:18:54,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:54,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:18:54,765 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:54,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1616776876, now seen corresponding path program 2 times [2024-06-27 20:18:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985814491] [2024-06-27 20:18:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:55,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:55,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985814491] [2024-06-27 20:18:55,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985814491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:55,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:55,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:55,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377611031] [2024-06-27 20:18:55,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:55,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:55,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:55,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:55,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:56,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:56,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 183 transitions, 1494 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 20:18:56,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:56,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:56,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:56,979 INFO L124 PetriNetUnfolderBase]: 3022/4599 cut-off events. [2024-06-27 20:18:56,979 INFO L125 PetriNetUnfolderBase]: For 410184/410186 co-relation queries the response was YES. [2024-06-27 20:18:57,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37041 conditions, 4599 events. 3022/4599 cut-off events. For 410184/410186 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 23570 event pairs, 824 based on Foata normal form. 4/4592 useless extension candidates. Maximal degree in co-relation 36971. Up to 4022 conditions per place. [2024-06-27 20:18:57,023 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 150 selfloop transitions, 71 changer transitions 0/228 dead transitions. [2024-06-27 20:18:57,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 228 transitions, 2288 flow [2024-06-27 20:18:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:18:57,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-27 20:18:57,024 INFO L175 Difference]: Start difference. First operand has 153 places, 183 transitions, 1494 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:18:57,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 228 transitions, 2288 flow [2024-06-27 20:18:57,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 228 transitions, 2149 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:57,429 INFO L231 Difference]: Finished difference. Result has 158 places, 187 transitions, 1589 flow [2024-06-27 20:18:57,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1589, PETRI_PLACES=158, PETRI_TRANSITIONS=187} [2024-06-27 20:18:57,430 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-27 20:18:57,430 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 187 transitions, 1589 flow [2024-06-27 20:18:57,430 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 20:18:57,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:57,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:57,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:18:57,430 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:57,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1616780751, now seen corresponding path program 1 times [2024-06-27 20:18:57,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:57,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388215633] [2024-06-27 20:18:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:57,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388215633] [2024-06-27 20:18:58,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388215633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:58,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:58,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:58,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621176112] [2024-06-27 20:18:58,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:58,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:58,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:58,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:58,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:58,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 187 transitions, 1589 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 20:18:58,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:58,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:58,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:59,714 INFO L124 PetriNetUnfolderBase]: 3067/4662 cut-off events. [2024-06-27 20:18:59,714 INFO L125 PetriNetUnfolderBase]: For 428692/428694 co-relation queries the response was YES. [2024-06-27 20:18:59,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37904 conditions, 4662 events. 3067/4662 cut-off events. For 428692/428694 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23903 event pairs, 766 based on Foata normal form. 4/4658 useless extension candidates. Maximal degree in co-relation 37832. Up to 3795 conditions per place. [2024-06-27 20:18:59,755 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 142 selfloop transitions, 95 changer transitions 0/244 dead transitions. [2024-06-27 20:18:59,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 244 transitions, 2459 flow [2024-06-27 20:18:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:18:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:18:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-27 20:18:59,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:18:59,756 INFO L175 Difference]: Start difference. First operand has 158 places, 187 transitions, 1589 flow. Second operand 12 states and 242 transitions. [2024-06-27 20:18:59,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 244 transitions, 2459 flow [2024-06-27 20:19:00,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 244 transitions, 2361 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:00,071 INFO L231 Difference]: Finished difference. Result has 164 places, 193 transitions, 1786 flow [2024-06-27 20:19:00,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1786, PETRI_PLACES=164, PETRI_TRANSITIONS=193} [2024-06-27 20:19:00,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-27 20:19:00,072 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 193 transitions, 1786 flow [2024-06-27 20:19:00,072 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 20:19:00,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:00,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:00,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:19:00,072 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:00,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 569285276, now seen corresponding path program 3 times [2024-06-27 20:19:00,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:00,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426113191] [2024-06-27 20:19:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:00,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:01,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426113191] [2024-06-27 20:19:01,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426113191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:01,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:01,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:01,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928020704] [2024-06-27 20:19:01,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:01,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:01,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:01,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:01,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 193 transitions, 1786 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 20:19:01,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:01,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:01,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:02,275 INFO L124 PetriNetUnfolderBase]: 3084/4689 cut-off events. [2024-06-27 20:19:02,276 INFO L125 PetriNetUnfolderBase]: For 450608/450610 co-relation queries the response was YES. [2024-06-27 20:19:02,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39166 conditions, 4689 events. 3084/4689 cut-off events. For 450608/450610 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 24079 event pairs, 824 based on Foata normal form. 4/4685 useless extension candidates. Maximal degree in co-relation 39092. Up to 4196 conditions per place. [2024-06-27 20:19:02,317 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 160 selfloop transitions, 62 changer transitions 0/229 dead transitions. [2024-06-27 20:19:02,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 229 transitions, 2348 flow [2024-06-27 20:19:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:19:02,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-27 20:19:02,318 INFO L175 Difference]: Start difference. First operand has 164 places, 193 transitions, 1786 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:19:02,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 229 transitions, 2348 flow [2024-06-27 20:19:02,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 229 transitions, 2206 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:02,706 INFO L231 Difference]: Finished difference. Result has 165 places, 195 transitions, 1811 flow [2024-06-27 20:19:02,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1811, PETRI_PLACES=165, PETRI_TRANSITIONS=195} [2024-06-27 20:19:02,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-27 20:19:02,706 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 195 transitions, 1811 flow [2024-06-27 20:19:02,706 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 20:19:02,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:02,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:02,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:19:02,707 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:02,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash -48534274, now seen corresponding path program 4 times [2024-06-27 20:19:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:02,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950745705] [2024-06-27 20:19:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:03,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:03,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950745705] [2024-06-27 20:19:03,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950745705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:03,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:03,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:03,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291151020] [2024-06-27 20:19:03,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:03,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:03,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:04,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:04,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 195 transitions, 1811 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 20:19:04,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:04,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:04,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:04,961 INFO L124 PetriNetUnfolderBase]: 3101/4716 cut-off events. [2024-06-27 20:19:04,961 INFO L125 PetriNetUnfolderBase]: For 469254/469256 co-relation queries the response was YES. [2024-06-27 20:19:04,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39766 conditions, 4716 events. 3101/4716 cut-off events. For 469254/469256 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 24288 event pairs, 824 based on Foata normal form. 4/4712 useless extension candidates. Maximal degree in co-relation 39690. Up to 4319 conditions per place. [2024-06-27 20:19:05,005 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 180 selfloop transitions, 41 changer transitions 0/228 dead transitions. [2024-06-27 20:19:05,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 228 transitions, 2367 flow [2024-06-27 20:19:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:19:05,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:19:05,008 INFO L175 Difference]: Start difference. First operand has 165 places, 195 transitions, 1811 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:19:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 228 transitions, 2367 flow [2024-06-27 20:19:05,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 228 transitions, 2226 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:05,314 INFO L231 Difference]: Finished difference. Result has 167 places, 197 transitions, 1799 flow [2024-06-27 20:19:05,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1799, PETRI_PLACES=167, PETRI_TRANSITIONS=197} [2024-06-27 20:19:05,315 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-27 20:19:05,315 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 197 transitions, 1799 flow [2024-06-27 20:19:05,315 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 20:19:05,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:05,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:05,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:19:05,316 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:05,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:05,316 INFO L85 PathProgramCache]: Analyzing trace with hash 655977086, now seen corresponding path program 5 times [2024-06-27 20:19:05,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:05,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906505467] [2024-06-27 20:19:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:05,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:06,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906505467] [2024-06-27 20:19:06,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906505467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:06,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:06,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:06,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020236260] [2024-06-27 20:19:06,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:06,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:06,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:06,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:06,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:06,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:06,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 197 transitions, 1799 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 20:19:06,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:06,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:06,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:07,528 INFO L124 PetriNetUnfolderBase]: 3093/4704 cut-off events. [2024-06-27 20:19:07,528 INFO L125 PetriNetUnfolderBase]: For 483187/483189 co-relation queries the response was YES. [2024-06-27 20:19:07,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39796 conditions, 4704 events. 3093/4704 cut-off events. For 483187/483189 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 24206 event pairs, 822 based on Foata normal form. 4/4700 useless extension candidates. Maximal degree in co-relation 39719. Up to 4289 conditions per place. [2024-06-27 20:19:07,570 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 175 selfloop transitions, 46 changer transitions 0/228 dead transitions. [2024-06-27 20:19:07,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 228 transitions, 2319 flow [2024-06-27 20:19:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:19:07,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:19:07,572 INFO L175 Difference]: Start difference. First operand has 167 places, 197 transitions, 1799 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:19:07,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 228 transitions, 2319 flow [2024-06-27 20:19:08,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 228 transitions, 2198 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:08,162 INFO L231 Difference]: Finished difference. Result has 169 places, 197 transitions, 1777 flow [2024-06-27 20:19:08,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1777, PETRI_PLACES=169, PETRI_TRANSITIONS=197} [2024-06-27 20:19:08,163 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-27 20:19:08,163 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 197 transitions, 1777 flow [2024-06-27 20:19:08,163 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 20:19:08,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:08,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:08,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:19:08,164 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 20:19:08,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash -732426325, now seen corresponding path program 1 times [2024-06-27 20:19:08,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:08,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916538018] [2024-06-27 20:19:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:08,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:09,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:09,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916538018] [2024-06-27 20:19:09,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916538018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:09,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:09,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:09,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164411578] [2024-06-27 20:19:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:09,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:09,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:09,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:09,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 197 transitions, 1777 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:09,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:09,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:09,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:09,859 INFO L124 PetriNetUnfolderBase]: 3150/4794 cut-off events. [2024-06-27 20:19:09,860 INFO L125 PetriNetUnfolderBase]: For 508535/508537 co-relation queries the response was YES. [2024-06-27 20:19:09,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40647 conditions, 4794 events. 3150/4794 cut-off events. For 508535/508537 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 24329 event pairs, 900 based on Foata normal form. 4/4797 useless extension candidates. Maximal degree in co-relation 40569. Up to 4337 conditions per place. [2024-06-27 20:19:09,902 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 168 selfloop transitions, 39 changer transitions 0/233 dead transitions. [2024-06-27 20:19:09,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 233 transitions, 2607 flow [2024-06-27 20:19:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:19:09,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-27 20:19:09,904 INFO L175 Difference]: Start difference. First operand has 169 places, 197 transitions, 1777 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:19:09,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 233 transitions, 2607 flow [2024-06-27 20:19:10,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 233 transitions, 2493 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:10,244 INFO L231 Difference]: Finished difference. Result has 169 places, 209 transitions, 1932 flow [2024-06-27 20:19:10,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=169, PETRI_TRANSITIONS=209} [2024-06-27 20:19:10,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-27 20:19:10,244 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 209 transitions, 1932 flow [2024-06-27 20:19:10,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:10,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:10,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:10,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:19:10,245 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:10,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash -64967660, now seen corresponding path program 6 times [2024-06-27 20:19:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:10,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742041726] [2024-06-27 20:19:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:10,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:11,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:11,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742041726] [2024-06-27 20:19:11,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742041726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:11,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:11,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:11,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121584873] [2024-06-27 20:19:11,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:11,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:11,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:11,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:11,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:11,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:11,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 209 transitions, 1932 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 20:19:11,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:11,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:11,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:12,464 INFO L124 PetriNetUnfolderBase]: 3133/4765 cut-off events. [2024-06-27 20:19:12,464 INFO L125 PetriNetUnfolderBase]: For 524580/524582 co-relation queries the response was YES. [2024-06-27 20:19:12,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41447 conditions, 4765 events. 3133/4765 cut-off events. For 524580/524582 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 24458 event pairs, 652 based on Foata normal form. 4/4765 useless extension candidates. Maximal degree in co-relation 41367. Up to 4221 conditions per place. [2024-06-27 20:19:12,508 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 184 selfloop transitions, 60 changer transitions 0/251 dead transitions. [2024-06-27 20:19:12,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 251 transitions, 2744 flow [2024-06-27 20:19:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 20:19:12,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-27 20:19:12,510 INFO L175 Difference]: Start difference. First operand has 169 places, 209 transitions, 1932 flow. Second operand 9 states and 188 transitions. [2024-06-27 20:19:12,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 251 transitions, 2744 flow [2024-06-27 20:19:12,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 251 transitions, 2674 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 20:19:12,868 INFO L231 Difference]: Finished difference. Result has 176 places, 211 transitions, 2021 flow [2024-06-27 20:19:12,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2021, PETRI_PLACES=176, PETRI_TRANSITIONS=211} [2024-06-27 20:19:12,868 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-27 20:19:12,868 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 211 transitions, 2021 flow [2024-06-27 20:19:12,869 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 20:19:12,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:12,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:12,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:19:12,869 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 20:19:12,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash 982531380, now seen corresponding path program 7 times [2024-06-27 20:19:12,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:12,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796499395] [2024-06-27 20:19:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:12,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:14,141 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 20:19:14,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796499395] [2024-06-27 20:19:14,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796499395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:14,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:14,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:14,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764366737] [2024-06-27 20:19:14,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:14,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:14,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:14,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:14,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 211 transitions, 2021 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 20:19:14,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:14,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:14,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:15,285 INFO L124 PetriNetUnfolderBase]: 3150/4792 cut-off events. [2024-06-27 20:19:15,285 INFO L125 PetriNetUnfolderBase]: For 543015/543017 co-relation queries the response was YES. [2024-06-27 20:19:15,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42030 conditions, 4792 events. 3150/4792 cut-off events. For 543015/543017 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 24688 event pairs, 824 based on Foata normal form. 4/4792 useless extension candidates. Maximal degree in co-relation 41948. Up to 4335 conditions per place. [2024-06-27 20:19:15,332 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 190 selfloop transitions, 57 changer transitions 0/254 dead transitions. [2024-06-27 20:19:15,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 254 transitions, 2655 flow [2024-06-27 20:19:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 20:19:15,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-27 20:19:15,334 INFO L175 Difference]: Start difference. First operand has 176 places, 211 transitions, 2021 flow. Second operand 10 states and 201 transitions. [2024-06-27 20:19:15,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 254 transitions, 2655 flow [2024-06-27 20:19:15,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 254 transitions, 2433 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:15,738 INFO L231 Difference]: Finished difference. Result has 178 places, 213 transitions, 1961 flow [2024-06-27 20:19:15,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1961, PETRI_PLACES=178, PETRI_TRANSITIONS=213} [2024-06-27 20:19:15,738 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-27 20:19:15,739 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 213 transitions, 1961 flow [2024-06-27 20:19:15,739 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 20:19:15,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:15,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:19:15,739 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 20:19:15,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash 982531535, now seen corresponding path program 2 times [2024-06-27 20:19:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:15,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321185218] [2024-06-27 20:19:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:16,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:16,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321185218] [2024-06-27 20:19:16,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321185218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:16,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:16,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:16,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446993402] [2024-06-27 20:19:16,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:16,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:16,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:16,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:17,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:17,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 213 transitions, 1961 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 20:19:17,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:17,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:17,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:18,086 INFO L124 PetriNetUnfolderBase]: 3189/4854 cut-off events. [2024-06-27 20:19:18,087 INFO L125 PetriNetUnfolderBase]: For 565298/565300 co-relation queries the response was YES. [2024-06-27 20:19:18,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42485 conditions, 4854 events. 3189/4854 cut-off events. For 565298/565300 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 25162 event pairs, 738 based on Foata normal form. 4/4855 useless extension candidates. Maximal degree in co-relation 42403. Up to 4038 conditions per place. [2024-06-27 20:19:18,130 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 171 selfloop transitions, 89 changer transitions 0/267 dead transitions. [2024-06-27 20:19:18,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 267 transitions, 2859 flow [2024-06-27 20:19:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 20:19:18,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-27 20:19:18,132 INFO L175 Difference]: Start difference. First operand has 178 places, 213 transitions, 1961 flow. Second operand 11 states and 229 transitions. [2024-06-27 20:19:18,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 267 transitions, 2859 flow [2024-06-27 20:19:18,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 267 transitions, 2729 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:18,541 INFO L231 Difference]: Finished difference. Result has 181 places, 216 transitions, 2061 flow [2024-06-27 20:19:18,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2061, PETRI_PLACES=181, PETRI_TRANSITIONS=216} [2024-06-27 20:19:18,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-27 20:19:18,541 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 216 transitions, 2061 flow [2024-06-27 20:19:18,542 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 20:19:18,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:18,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:18,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:19:18,542 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 20:19:18,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash -59249865, now seen corresponding path program 3 times [2024-06-27 20:19:18,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:18,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774596864] [2024-06-27 20:19:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:19,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:19,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774596864] [2024-06-27 20:19:19,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774596864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:19,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:19,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152009985] [2024-06-27 20:19:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:19,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:19,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:19,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 216 transitions, 2061 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 20:19:19,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:19,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:19,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:20,712 INFO L124 PetriNetUnfolderBase]: 3189/4852 cut-off events. [2024-06-27 20:19:20,713 INFO L125 PetriNetUnfolderBase]: For 580841/580843 co-relation queries the response was YES. [2024-06-27 20:19:20,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42970 conditions, 4852 events. 3189/4852 cut-off events. For 580841/580843 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 25163 event pairs, 807 based on Foata normal form. 4/4855 useless extension candidates. Maximal degree in co-relation 42887. Up to 4187 conditions per place. [2024-06-27 20:19:20,759 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 179 selfloop transitions, 73 changer transitions 0/259 dead transitions. [2024-06-27 20:19:20,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 259 transitions, 2985 flow [2024-06-27 20:19:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 20:19:20,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-27 20:19:20,760 INFO L175 Difference]: Start difference. First operand has 181 places, 216 transitions, 2061 flow. Second operand 9 states and 185 transitions. [2024-06-27 20:19:20,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 259 transitions, 2985 flow [2024-06-27 20:19:21,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 259 transitions, 2769 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:21,176 INFO L231 Difference]: Finished difference. Result has 182 places, 222 transitions, 2143 flow [2024-06-27 20:19:21,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2143, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2024-06-27 20:19:21,176 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-27 20:19:21,176 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 2143 flow [2024-06-27 20:19:21,177 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 20:19:21,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:21,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:21,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:19:21,177 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 20:19:21,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash -59451675, now seen corresponding path program 4 times [2024-06-27 20:19:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:21,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002964171] [2024-06-27 20:19:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:22,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:22,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002964171] [2024-06-27 20:19:22,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002964171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:22,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:22,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:22,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550384525] [2024-06-27 20:19:22,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:22,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:22,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:22,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:22,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 2143 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 20:19:22,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:22,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:22,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:23,364 INFO L124 PetriNetUnfolderBase]: 3213/4890 cut-off events. [2024-06-27 20:19:23,364 INFO L125 PetriNetUnfolderBase]: For 605245/605247 co-relation queries the response was YES. [2024-06-27 20:19:23,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43928 conditions, 4890 events. 3213/4890 cut-off events. For 605245/605247 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 25421 event pairs, 773 based on Foata normal form. 4/4890 useless extension candidates. Maximal degree in co-relation 43843. Up to 4205 conditions per place. [2024-06-27 20:19:23,413 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 184 selfloop transitions, 72 changer transitions 0/263 dead transitions. [2024-06-27 20:19:23,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 3033 flow [2024-06-27 20:19:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 20:19:23,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 20:19:23,415 INFO L175 Difference]: Start difference. First operand has 182 places, 222 transitions, 2143 flow. Second operand 9 states and 187 transitions. [2024-06-27 20:19:23,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 3033 flow [2024-06-27 20:19:23,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 263 transitions, 2895 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:23,989 INFO L231 Difference]: Finished difference. Result has 185 places, 225 transitions, 2211 flow [2024-06-27 20:19:23,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2211, PETRI_PLACES=185, PETRI_TRANSITIONS=225} [2024-06-27 20:19:23,990 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-06-27 20:19:23,990 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 225 transitions, 2211 flow [2024-06-27 20:19:23,990 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 20:19:23,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:23,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:23,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:19:23,990 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:23,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash 988038065, now seen corresponding path program 5 times [2024-06-27 20:19:23,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:23,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158504694] [2024-06-27 20:19:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:23,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:25,240 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 20:19:25,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158504694] [2024-06-27 20:19:25,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158504694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:25,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:25,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328526870] [2024-06-27 20:19:25,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:25,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:25,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:25,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:25,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 225 transitions, 2211 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 20:19:25,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:25,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:25,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:26,442 INFO L124 PetriNetUnfolderBase]: 3243/4943 cut-off events. [2024-06-27 20:19:26,442 INFO L125 PetriNetUnfolderBase]: For 630072/630074 co-relation queries the response was YES. [2024-06-27 20:19:26,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44773 conditions, 4943 events. 3243/4943 cut-off events. For 630072/630074 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 25833 event pairs, 734 based on Foata normal form. 4/4944 useless extension candidates. Maximal degree in co-relation 44687. Up to 4239 conditions per place. [2024-06-27 20:19:26,493 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 185 selfloop transitions, 76 changer transitions 0/268 dead transitions. [2024-06-27 20:19:26,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 268 transitions, 2897 flow [2024-06-27 20:19:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 20:19:26,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-27 20:19:26,494 INFO L175 Difference]: Start difference. First operand has 185 places, 225 transitions, 2211 flow. Second operand 10 states and 203 transitions. [2024-06-27 20:19:26,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 268 transitions, 2897 flow [2024-06-27 20:19:26,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 268 transitions, 2721 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:26,946 INFO L231 Difference]: Finished difference. Result has 188 places, 228 transitions, 2259 flow [2024-06-27 20:19:26,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2259, PETRI_PLACES=188, PETRI_TRANSITIONS=228} [2024-06-27 20:19:26,946 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-27 20:19:26,946 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 228 transitions, 2259 flow [2024-06-27 20:19:26,947 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 20:19:26,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:26,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:26,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:19:26,947 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 20:19:26,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash 988037910, now seen corresponding path program 8 times [2024-06-27 20:19:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:26,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090940380] [2024-06-27 20:19:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:28,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:28,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090940380] [2024-06-27 20:19:28,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090940380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:28,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:28,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:28,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410167436] [2024-06-27 20:19:28,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:28,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:28,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:28,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:28,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:28,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:28,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 228 transitions, 2259 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 20:19:28,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:28,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:28,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:29,271 INFO L124 PetriNetUnfolderBase]: 3250/4948 cut-off events. [2024-06-27 20:19:29,271 INFO L125 PetriNetUnfolderBase]: For 646445/646447 co-relation queries the response was YES. [2024-06-27 20:19:29,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44995 conditions, 4948 events. 3250/4948 cut-off events. For 646445/646447 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 25773 event pairs, 861 based on Foata normal form. 4/4951 useless extension candidates. Maximal degree in co-relation 44908. Up to 4544 conditions per place. [2024-06-27 20:19:29,322 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 213 selfloop transitions, 41 changer transitions 0/261 dead transitions. [2024-06-27 20:19:29,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 261 transitions, 2877 flow [2024-06-27 20:19:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:19:29,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-27 20:19:29,323 INFO L175 Difference]: Start difference. First operand has 188 places, 228 transitions, 2259 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:19:29,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 261 transitions, 2877 flow [2024-06-27 20:19:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 261 transitions, 2687 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:29,897 INFO L231 Difference]: Finished difference. Result has 189 places, 230 transitions, 2194 flow [2024-06-27 20:19:29,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2194, PETRI_PLACES=189, PETRI_TRANSITIONS=230} [2024-06-27 20:19:29,898 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-27 20:19:29,898 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 230 transitions, 2194 flow [2024-06-27 20:19:29,898 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 20:19:29,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:29,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:29,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:19:29,898 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:29,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:29,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1269673113, now seen corresponding path program 2 times [2024-06-27 20:19:29,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:29,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504683823] [2024-06-27 20:19:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:29,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504683823] [2024-06-27 20:19:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504683823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:30,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:30,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996518182] [2024-06-27 20:19:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:30,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:30,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:30,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:30,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:30,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:30,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 230 transitions, 2194 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:30,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:30,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:30,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:31,606 INFO L124 PetriNetUnfolderBase]: 3339/5084 cut-off events. [2024-06-27 20:19:31,606 INFO L125 PetriNetUnfolderBase]: For 657836/657838 co-relation queries the response was YES. [2024-06-27 20:19:31,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45649 conditions, 5084 events. 3339/5084 cut-off events. For 657836/657838 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 26147 event pairs, 923 based on Foata normal form. 4/5087 useless extension candidates. Maximal degree in co-relation 45561. Up to 4601 conditions per place. [2024-06-27 20:19:31,659 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 185 selfloop transitions, 42 changer transitions 0/256 dead transitions. [2024-06-27 20:19:31,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 256 transitions, 3035 flow [2024-06-27 20:19:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:19:31,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 20:19:31,660 INFO L175 Difference]: Start difference. First operand has 189 places, 230 transitions, 2194 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:19:31,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 256 transitions, 3035 flow [2024-06-27 20:19:32,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 256 transitions, 2932 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:32,137 INFO L231 Difference]: Finished difference. Result has 190 places, 238 transitions, 2312 flow [2024-06-27 20:19:32,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2312, PETRI_PLACES=190, PETRI_TRANSITIONS=238} [2024-06-27 20:19:32,138 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-27 20:19:32,138 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 238 transitions, 2312 flow [2024-06-27 20:19:32,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:32,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:32,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:32,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:19:32,139 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:32,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash -732067841, now seen corresponding path program 1 times [2024-06-27 20:19:32,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:32,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647084423] [2024-06-27 20:19:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:32,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:32,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:32,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647084423] [2024-06-27 20:19:32,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647084423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:32,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:32,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:32,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56919089] [2024-06-27 20:19:32,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:32,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:32,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:32,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:32,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:33,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:19:33,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 238 transitions, 2312 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:33,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:33,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:19:33,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:33,906 INFO L124 PetriNetUnfolderBase]: 3538/5284 cut-off events. [2024-06-27 20:19:33,907 INFO L125 PetriNetUnfolderBase]: For 676276/676276 co-relation queries the response was YES. [2024-06-27 20:19:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47095 conditions, 5284 events. 3538/5284 cut-off events. For 676276/676276 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 26434 event pairs, 987 based on Foata normal form. 1/5284 useless extension candidates. Maximal degree in co-relation 47005. Up to 5055 conditions per place. [2024-06-27 20:19:33,960 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 211 selfloop transitions, 23 changer transitions 0/261 dead transitions. [2024-06-27 20:19:33,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 261 transitions, 3036 flow [2024-06-27 20:19:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:19:33,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-27 20:19:33,961 INFO L175 Difference]: Start difference. First operand has 190 places, 238 transitions, 2312 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:19:33,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 261 transitions, 3036 flow [2024-06-27 20:19:34,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 261 transitions, 2947 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:34,590 INFO L231 Difference]: Finished difference. Result has 194 places, 244 transitions, 2377 flow [2024-06-27 20:19:34,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2377, PETRI_PLACES=194, PETRI_TRANSITIONS=244} [2024-06-27 20:19:34,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-27 20:19:34,590 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 244 transitions, 2377 flow [2024-06-27 20:19:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:34,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:34,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:19:34,591 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 20:19:34,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1377524535, now seen corresponding path program 6 times [2024-06-27 20:19:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182702829] [2024-06-27 20:19:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:35,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:35,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182702829] [2024-06-27 20:19:35,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182702829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:35,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:35,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643132625] [2024-06-27 20:19:35,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:35,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:35,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:35,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:35,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:35,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 244 transitions, 2377 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 20:19:35,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:35,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:35,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:36,763 INFO L124 PetriNetUnfolderBase]: 3318/5039 cut-off events. [2024-06-27 20:19:36,764 INFO L125 PetriNetUnfolderBase]: For 694390/694392 co-relation queries the response was YES. [2024-06-27 20:19:36,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46387 conditions, 5039 events. 3318/5039 cut-off events. For 694390/694392 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26306 event pairs, 850 based on Foata normal form. 8/5046 useless extension candidates. Maximal degree in co-relation 46296. Up to 4675 conditions per place. [2024-06-27 20:19:36,819 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 243 selfloop transitions, 35 changer transitions 0/287 dead transitions. [2024-06-27 20:19:36,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 287 transitions, 3637 flow [2024-06-27 20:19:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:19:36,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-27 20:19:36,821 INFO L175 Difference]: Start difference. First operand has 194 places, 244 transitions, 2377 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:19:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 287 transitions, 3637 flow [2024-06-27 20:19:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 287 transitions, 3581 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:37,455 INFO L231 Difference]: Finished difference. Result has 201 places, 253 transitions, 2602 flow [2024-06-27 20:19:37,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2602, PETRI_PLACES=201, PETRI_TRANSITIONS=253} [2024-06-27 20:19:37,456 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-27 20:19:37,456 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 253 transitions, 2602 flow [2024-06-27 20:19:37,456 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 20:19:37,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:37,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:37,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:19:37,456 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 20:19:37,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:37,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1736386407, now seen corresponding path program 1 times [2024-06-27 20:19:37,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:37,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142557759] [2024-06-27 20:19:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:37,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:38,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:38,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142557759] [2024-06-27 20:19:38,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142557759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:38,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:38,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:38,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305446337] [2024-06-27 20:19:38,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:38,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:38,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:38,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:38,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:19:38,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 253 transitions, 2602 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:38,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:38,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:19:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:39,738 INFO L124 PetriNetUnfolderBase]: 3569/5338 cut-off events. [2024-06-27 20:19:39,738 INFO L125 PetriNetUnfolderBase]: For 723169/723169 co-relation queries the response was YES. [2024-06-27 20:19:39,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49134 conditions, 5338 events. 3569/5338 cut-off events. For 723169/723169 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 26811 event pairs, 913 based on Foata normal form. 2/5339 useless extension candidates. Maximal degree in co-relation 49040. Up to 5109 conditions per place. [2024-06-27 20:19:39,796 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 252 selfloop transitions, 25 changer transitions 0/284 dead transitions. [2024-06-27 20:19:39,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 284 transitions, 3259 flow [2024-06-27 20:19:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:19:39,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-06-27 20:19:39,797 INFO L175 Difference]: Start difference. First operand has 201 places, 253 transitions, 2602 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:19:39,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 284 transitions, 3259 flow [2024-06-27 20:19:40,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 284 transitions, 3026 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:40,531 INFO L231 Difference]: Finished difference. Result has 204 places, 256 transitions, 2468 flow [2024-06-27 20:19:40,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2468, PETRI_PLACES=204, PETRI_TRANSITIONS=256} [2024-06-27 20:19:40,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-27 20:19:40,532 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 256 transitions, 2468 flow [2024-06-27 20:19:40,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:40,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:40,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:40,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:19:40,532 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 20:19:40,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1552499209, now seen corresponding path program 7 times [2024-06-27 20:19:40,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359102507] [2024-06-27 20:19:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:40,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:41,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:41,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359102507] [2024-06-27 20:19:41,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359102507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:41,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:41,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:41,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122383625] [2024-06-27 20:19:41,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:41,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:41,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:41,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:41,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 256 transitions, 2468 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 20:19:41,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:41,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:41,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:42,768 INFO L124 PetriNetUnfolderBase]: 3367/5112 cut-off events. [2024-06-27 20:19:42,768 INFO L125 PetriNetUnfolderBase]: For 737077/737079 co-relation queries the response was YES. [2024-06-27 20:19:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47815 conditions, 5112 events. 3367/5112 cut-off events. For 737077/737079 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 26776 event pairs, 790 based on Foata normal form. 6/5115 useless extension candidates. Maximal degree in co-relation 47720. Up to 4652 conditions per place. [2024-06-27 20:19:42,826 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 238 selfloop transitions, 45 changer transitions 0/292 dead transitions. [2024-06-27 20:19:42,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 292 transitions, 3410 flow [2024-06-27 20:19:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:19:42,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 20:19:42,827 INFO L175 Difference]: Start difference. First operand has 204 places, 256 transitions, 2468 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:19:42,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 292 transitions, 3410 flow [2024-06-27 20:19:43,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 292 transitions, 3356 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:43,395 INFO L231 Difference]: Finished difference. Result has 205 places, 259 transitions, 2578 flow [2024-06-27 20:19:43,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2414, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2578, PETRI_PLACES=205, PETRI_TRANSITIONS=259} [2024-06-27 20:19:43,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-27 20:19:43,396 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 259 transitions, 2578 flow [2024-06-27 20:19:43,396 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 20:19:43,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:43,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:43,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:19:43,396 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:43,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2002619863, now seen corresponding path program 8 times [2024-06-27 20:19:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:43,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509139858] [2024-06-27 20:19:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:44,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:44,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509139858] [2024-06-27 20:19:44,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509139858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:44,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:44,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:44,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060736172] [2024-06-27 20:19:44,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:44,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:44,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:44,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 259 transitions, 2578 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 20:19:44,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:44,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:44,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:45,664 INFO L124 PetriNetUnfolderBase]: 3389/5149 cut-off events. [2024-06-27 20:19:45,664 INFO L125 PetriNetUnfolderBase]: For 761352/761354 co-relation queries the response was YES. [2024-06-27 20:19:45,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48601 conditions, 5149 events. 3389/5149 cut-off events. For 761352/761354 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 27072 event pairs, 785 based on Foata normal form. 6/5152 useless extension candidates. Maximal degree in co-relation 48505. Up to 4684 conditions per place. [2024-06-27 20:19:45,723 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 238 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-06-27 20:19:45,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 295 transitions, 3536 flow [2024-06-27 20:19:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:19:45,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:19:45,725 INFO L175 Difference]: Start difference. First operand has 205 places, 259 transitions, 2578 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:19:45,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 295 transitions, 3536 flow [2024-06-27 20:19:46,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 295 transitions, 3402 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:46,386 INFO L231 Difference]: Finished difference. Result has 207 places, 262 transitions, 2620 flow [2024-06-27 20:19:46,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2620, PETRI_PLACES=207, PETRI_TRANSITIONS=262} [2024-06-27 20:19:46,387 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 162 predicate places. [2024-06-27 20:19:46,387 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 262 transitions, 2620 flow [2024-06-27 20:19:46,387 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 20:19:46,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:46,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:46,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:19:46,387 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:46,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash -157142845, now seen corresponding path program 9 times [2024-06-27 20:19:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:46,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976249699] [2024-06-27 20:19:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:47,909 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 20:19:47,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:47,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976249699] [2024-06-27 20:19:47,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976249699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:47,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:47,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498973457] [2024-06-27 20:19:47,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:48,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:48,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 262 transitions, 2620 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 20:19:48,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:48,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:48,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:49,214 INFO L124 PetriNetUnfolderBase]: 3379/5150 cut-off events. [2024-06-27 20:19:49,214 INFO L125 PetriNetUnfolderBase]: For 777987/777989 co-relation queries the response was YES. [2024-06-27 20:19:49,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48580 conditions, 5150 events. 3379/5150 cut-off events. For 777987/777989 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 27254 event pairs, 1316 based on Foata normal form. 6/5151 useless extension candidates. Maximal degree in co-relation 48483. Up to 4612 conditions per place. [2024-06-27 20:19:49,270 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 236 selfloop transitions, 54 changer transitions 0/299 dead transitions. [2024-06-27 20:19:49,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 299 transitions, 3314 flow [2024-06-27 20:19:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-27 20:19:49,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214876033057851 [2024-06-27 20:19:49,271 INFO L175 Difference]: Start difference. First operand has 207 places, 262 transitions, 2620 flow. Second operand 11 states and 204 transitions. [2024-06-27 20:19:49,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 299 transitions, 3314 flow [2024-06-27 20:19:49,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 299 transitions, 3148 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:49,997 INFO L231 Difference]: Finished difference. Result has 212 places, 264 transitions, 2597 flow [2024-06-27 20:19:49,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2597, PETRI_PLACES=212, PETRI_TRANSITIONS=264} [2024-06-27 20:19:49,997 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-27 20:19:49,997 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 264 transitions, 2597 flow [2024-06-27 20:19:49,997 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 20:19:49,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:49,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:49,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:19:49,997 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:49,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash -157143000, now seen corresponding path program 9 times [2024-06-27 20:19:49,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:49,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182728085] [2024-06-27 20:19:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:49,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:51,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:51,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182728085] [2024-06-27 20:19:51,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182728085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:51,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:51,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112706468] [2024-06-27 20:19:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:51,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:51,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:51,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 264 transitions, 2597 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 20:19:51,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:51,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:51,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:52,300 INFO L124 PetriNetUnfolderBase]: 3371/5138 cut-off events. [2024-06-27 20:19:52,300 INFO L125 PetriNetUnfolderBase]: For 793119/793121 co-relation queries the response was YES. [2024-06-27 20:19:52,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48543 conditions, 5138 events. 3371/5138 cut-off events. For 793119/793121 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 27116 event pairs, 1339 based on Foata normal form. 6/5139 useless extension candidates. Maximal degree in co-relation 48444. Up to 4829 conditions per place. [2024-06-27 20:19:52,358 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 260 selfloop transitions, 22 changer transitions 0/291 dead transitions. [2024-06-27 20:19:52,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 291 transitions, 3229 flow [2024-06-27 20:19:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:19:52,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-27 20:19:52,359 INFO L175 Difference]: Start difference. First operand has 212 places, 264 transitions, 2597 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:19:52,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 291 transitions, 3229 flow [2024-06-27 20:19:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 291 transitions, 3057 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:53,285 INFO L231 Difference]: Finished difference. Result has 214 places, 264 transitions, 2476 flow [2024-06-27 20:19:53,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2476, PETRI_PLACES=214, PETRI_TRANSITIONS=264} [2024-06-27 20:19:53,285 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-27 20:19:53,285 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 264 transitions, 2476 flow [2024-06-27 20:19:53,285 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 20:19:53,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:53,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:53,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:19:53,286 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 20:19:53,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash -318285731, now seen corresponding path program 2 times [2024-06-27 20:19:53,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:53,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169175050] [2024-06-27 20:19:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:53,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:53,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169175050] [2024-06-27 20:19:53,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169175050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:53,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:53,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76248733] [2024-06-27 20:19:53,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:53,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:53,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:53,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:54,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:19:54,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 264 transitions, 2476 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:54,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:54,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:19:54,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:54,994 INFO L124 PetriNetUnfolderBase]: 3628/5433 cut-off events. [2024-06-27 20:19:54,995 INFO L125 PetriNetUnfolderBase]: For 796079/796082 co-relation queries the response was YES. [2024-06-27 20:19:55,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49618 conditions, 5433 events. 3628/5433 cut-off events. For 796079/796082 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 27580 event pairs, 1600 based on Foata normal form. 4/5426 useless extension candidates. Maximal degree in co-relation 49517. Up to 5223 conditions per place. [2024-06-27 20:19:55,055 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 234 selfloop transitions, 15 changer transitions 0/276 dead transitions. [2024-06-27 20:19:55,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 276 transitions, 3050 flow [2024-06-27 20:19:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:19:55,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-27 20:19:55,056 INFO L175 Difference]: Start difference. First operand has 214 places, 264 transitions, 2476 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:19:55,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 276 transitions, 3050 flow [2024-06-27 20:19:55,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 276 transitions, 2983 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:55,981 INFO L231 Difference]: Finished difference. Result has 213 places, 267 transitions, 2505 flow [2024-06-27 20:19:55,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2505, PETRI_PLACES=213, PETRI_TRANSITIONS=267} [2024-06-27 20:19:55,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-27 20:19:55,981 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 267 transitions, 2505 flow [2024-06-27 20:19:55,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:55,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:55,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:55,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:19:55,982 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 20:19:55,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash -318761395, now seen corresponding path program 3 times [2024-06-27 20:19:55,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:55,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029680249] [2024-06-27 20:19:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:55,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:56,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:56,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029680249] [2024-06-27 20:19:56,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029680249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:56,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:56,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743935446] [2024-06-27 20:19:56,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:56,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:56,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:56,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:56,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 267 transitions, 2505 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:56,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:56,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:56,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:57,848 INFO L124 PetriNetUnfolderBase]: 3448/5253 cut-off events. [2024-06-27 20:19:57,849 INFO L125 PetriNetUnfolderBase]: For 819115/819120 co-relation queries the response was YES. [2024-06-27 20:19:57,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48865 conditions, 5253 events. 3448/5253 cut-off events. For 819115/819120 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 27354 event pairs, 1494 based on Foata normal form. 7/5249 useless extension candidates. Maximal degree in co-relation 48763. Up to 4864 conditions per place. [2024-06-27 20:19:57,894 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 219 selfloop transitions, 26 changer transitions 0/277 dead transitions. [2024-06-27 20:19:57,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 277 transitions, 3151 flow [2024-06-27 20:19:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:19:57,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 20:19:57,895 INFO L175 Difference]: Start difference. First operand has 213 places, 267 transitions, 2505 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:19:57,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 277 transitions, 3151 flow [2024-06-27 20:19:58,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 277 transitions, 3061 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:58,593 INFO L231 Difference]: Finished difference. Result has 215 places, 267 transitions, 2475 flow [2024-06-27 20:19:58,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2475, PETRI_PLACES=215, PETRI_TRANSITIONS=267} [2024-06-27 20:19:58,594 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-27 20:19:58,594 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 267 transitions, 2475 flow [2024-06-27 20:19:58,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:58,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:58,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:58,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:19:58,594 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:58,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash -318760961, now seen corresponding path program 3 times [2024-06-27 20:19:58,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:58,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208657295] [2024-06-27 20:19:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:58,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:59,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:59,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208657295] [2024-06-27 20:19:59,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208657295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:59,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:59,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:59,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451490880] [2024-06-27 20:19:59,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:59,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:59,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:59,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:19:59,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 267 transitions, 2475 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:59,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:59,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:19:59,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:00,499 INFO L124 PetriNetUnfolderBase]: 3621/5424 cut-off events. [2024-06-27 20:20:00,499 INFO L125 PetriNetUnfolderBase]: For 835955/835958 co-relation queries the response was YES. [2024-06-27 20:20:00,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49960 conditions, 5424 events. 3621/5424 cut-off events. For 835955/835958 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 27488 event pairs, 1598 based on Foata normal form. 4/5417 useless extension candidates. Maximal degree in co-relation 49857. Up to 5208 conditions per place. [2024-06-27 20:20:00,550 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 229 selfloop transitions, 20 changer transitions 0/276 dead transitions. [2024-06-27 20:20:00,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 276 transitions, 2995 flow [2024-06-27 20:20:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:20:00,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-27 20:20:00,551 INFO L175 Difference]: Start difference. First operand has 215 places, 267 transitions, 2475 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:20:00,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 276 transitions, 2995 flow [2024-06-27 20:20:01,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 276 transitions, 2833 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:01,322 INFO L231 Difference]: Finished difference. Result has 214 places, 267 transitions, 2359 flow [2024-06-27 20:20:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2359, PETRI_PLACES=214, PETRI_TRANSITIONS=267} [2024-06-27 20:20:01,322 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-27 20:20:01,323 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 267 transitions, 2359 flow [2024-06-27 20:20:01,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:01,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:01,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:20:01,323 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:01,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash -326857417, now seen corresponding path program 1 times [2024-06-27 20:20:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525229449] [2024-06-27 20:20:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:02,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:02,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525229449] [2024-06-27 20:20:02,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525229449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:02,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:02,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:02,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349493155] [2024-06-27 20:20:02,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:02,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:02,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:02,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 2359 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:02,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:02,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:02,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:03,372 INFO L124 PetriNetUnfolderBase]: 3615/5423 cut-off events. [2024-06-27 20:20:03,372 INFO L125 PetriNetUnfolderBase]: For 858418/858418 co-relation queries the response was YES. [2024-06-27 20:20:03,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50193 conditions, 5423 events. 3615/5423 cut-off events. For 858418/858418 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 27519 event pairs, 1531 based on Foata normal form. 1/5423 useless extension candidates. Maximal degree in co-relation 50091. Up to 5212 conditions per place. [2024-06-27 20:20:03,430 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 256 selfloop transitions, 25 changer transitions 0/289 dead transitions. [2024-06-27 20:20:03,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 289 transitions, 3173 flow [2024-06-27 20:20:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:20:03,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 20:20:03,431 INFO L175 Difference]: Start difference. First operand has 214 places, 267 transitions, 2359 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:20:03,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 289 transitions, 3173 flow [2024-06-27 20:20:04,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 289 transitions, 3104 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:04,286 INFO L231 Difference]: Finished difference. Result has 215 places, 273 transitions, 2428 flow [2024-06-27 20:20:04,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2428, PETRI_PLACES=215, PETRI_TRANSITIONS=273} [2024-06-27 20:20:04,287 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-27 20:20:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 273 transitions, 2428 flow [2024-06-27 20:20:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:04,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:20:04,288 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:04,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash -554752057, now seen corresponding path program 2 times [2024-06-27 20:20:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:04,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4783982] [2024-06-27 20:20:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:04,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:05,054 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 20:20:05,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:05,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4783982] [2024-06-27 20:20:05,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4783982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:05,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:05,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:05,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110946164] [2024-06-27 20:20:05,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:05,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:05,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:05,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:05,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:05,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:05,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 273 transitions, 2428 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:05,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:05,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:05,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:06,297 INFO L124 PetriNetUnfolderBase]: 3620/5430 cut-off events. [2024-06-27 20:20:06,298 INFO L125 PetriNetUnfolderBase]: For 883903/883903 co-relation queries the response was YES. [2024-06-27 20:20:06,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50976 conditions, 5430 events. 3620/5430 cut-off events. For 883903/883903 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 27491 event pairs, 1531 based on Foata normal form. 1/5430 useless extension candidates. Maximal degree in co-relation 50873. Up to 5218 conditions per place. [2024-06-27 20:20:06,357 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 254 selfloop transitions, 27 changer transitions 0/289 dead transitions. [2024-06-27 20:20:06,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 289 transitions, 3204 flow [2024-06-27 20:20:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:20:06,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 20:20:06,358 INFO L175 Difference]: Start difference. First operand has 215 places, 273 transitions, 2428 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:20:06,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 289 transitions, 3204 flow [2024-06-27 20:20:07,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 289 transitions, 3137 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:07,253 INFO L231 Difference]: Finished difference. Result has 219 places, 276 transitions, 2465 flow [2024-06-27 20:20:07,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2465, PETRI_PLACES=219, PETRI_TRANSITIONS=276} [2024-06-27 20:20:07,253 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-27 20:20:07,253 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 276 transitions, 2465 flow [2024-06-27 20:20:07,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:07,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:07,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:07,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:20:07,254 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:07,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:07,254 INFO L85 PathProgramCache]: Analyzing trace with hash -554751809, now seen corresponding path program 1 times [2024-06-27 20:20:07,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:07,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985990822] [2024-06-27 20:20:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:07,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985990822] [2024-06-27 20:20:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985990822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:07,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:07,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:07,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040952351] [2024-06-27 20:20:07,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:07,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:07,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:08,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:08,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 276 transitions, 2465 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:08,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:08,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:08,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:09,129 INFO L124 PetriNetUnfolderBase]: 3648/5457 cut-off events. [2024-06-27 20:20:09,129 INFO L125 PetriNetUnfolderBase]: For 908366/908369 co-relation queries the response was YES. [2024-06-27 20:20:09,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51322 conditions, 5457 events. 3648/5457 cut-off events. For 908366/908369 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 27571 event pairs, 1598 based on Foata normal form. 4/5450 useless extension candidates. Maximal degree in co-relation 51217. Up to 5210 conditions per place. [2024-06-27 20:20:09,190 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 241 selfloop transitions, 24 changer transitions 0/295 dead transitions. [2024-06-27 20:20:09,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 295 transitions, 3251 flow [2024-06-27 20:20:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:20:09,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 20:20:09,191 INFO L175 Difference]: Start difference. First operand has 219 places, 276 transitions, 2465 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:20:09,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 295 transitions, 3251 flow [2024-06-27 20:20:10,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 295 transitions, 3189 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:10,206 INFO L231 Difference]: Finished difference. Result has 222 places, 282 transitions, 2547 flow [2024-06-27 20:20:10,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2403, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2547, PETRI_PLACES=222, PETRI_TRANSITIONS=282} [2024-06-27 20:20:10,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 177 predicate places. [2024-06-27 20:20:10,207 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 282 transitions, 2547 flow [2024-06-27 20:20:10,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:10,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:10,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:10,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:20:10,207 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 20:20:10,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash 202180731, now seen corresponding path program 2 times [2024-06-27 20:20:10,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:10,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754155902] [2024-06-27 20:20:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:10,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:10,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754155902] [2024-06-27 20:20:10,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754155902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:10,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:10,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746468638] [2024-06-27 20:20:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:10,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:10,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:10,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:10,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 282 transitions, 2547 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:10,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:10,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:12,130 INFO L124 PetriNetUnfolderBase]: 3653/5465 cut-off events. [2024-06-27 20:20:12,130 INFO L125 PetriNetUnfolderBase]: For 934793/934798 co-relation queries the response was YES. [2024-06-27 20:20:12,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52101 conditions, 5465 events. 3653/5465 cut-off events. For 934793/934798 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 27674 event pairs, 1600 based on Foata normal form. 6/5460 useless extension candidates. Maximal degree in co-relation 51995. Up to 5216 conditions per place. [2024-06-27 20:20:12,187 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 237 selfloop transitions, 28 changer transitions 0/295 dead transitions. [2024-06-27 20:20:12,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 295 transitions, 3291 flow [2024-06-27 20:20:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:20:12,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 20:20:12,188 INFO L175 Difference]: Start difference. First operand has 222 places, 282 transitions, 2547 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:20:12,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 295 transitions, 3291 flow [2024-06-27 20:20:13,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 295 transitions, 3236 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:13,208 INFO L231 Difference]: Finished difference. Result has 226 places, 285 transitions, 2602 flow [2024-06-27 20:20:13,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2602, PETRI_PLACES=226, PETRI_TRANSITIONS=285} [2024-06-27 20:20:13,208 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-27 20:20:13,208 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 285 transitions, 2602 flow [2024-06-27 20:20:13,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:13,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:13,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:13,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:20:13,208 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 20:20:13,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash -548265307, now seen corresponding path program 3 times [2024-06-27 20:20:13,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:13,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806718824] [2024-06-27 20:20:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:14,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:14,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806718824] [2024-06-27 20:20:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806718824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:14,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:14,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:14,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088962245] [2024-06-27 20:20:14,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:14,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:14,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:14,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:14,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 285 transitions, 2602 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:14,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:14,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:14,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:15,358 INFO L124 PetriNetUnfolderBase]: 3639/5453 cut-off events. [2024-06-27 20:20:15,358 INFO L125 PetriNetUnfolderBase]: For 957219/957221 co-relation queries the response was YES. [2024-06-27 20:20:15,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52554 conditions, 5453 events. 3639/5453 cut-off events. For 957219/957221 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 27561 event pairs, 1537 based on Foata normal form. 1/5453 useless extension candidates. Maximal degree in co-relation 52446. Up to 5237 conditions per place. [2024-06-27 20:20:15,411 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 256 selfloop transitions, 27 changer transitions 0/294 dead transitions. [2024-06-27 20:20:15,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 294 transitions, 3190 flow [2024-06-27 20:20:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:15,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:20:15,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 20:20:15,412 INFO L175 Difference]: Start difference. First operand has 226 places, 285 transitions, 2602 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:20:15,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 294 transitions, 3190 flow [2024-06-27 20:20:16,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 294 transitions, 3090 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:16,299 INFO L231 Difference]: Finished difference. Result has 229 places, 285 transitions, 2562 flow [2024-06-27 20:20:16,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2502, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2562, PETRI_PLACES=229, PETRI_TRANSITIONS=285} [2024-06-27 20:20:16,300 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-27 20:20:16,300 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 285 transitions, 2562 flow [2024-06-27 20:20:16,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:16,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:16,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:16,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:20:16,300 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 20:20:16,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash -318576449, now seen corresponding path program 3 times [2024-06-27 20:20:16,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:16,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504938288] [2024-06-27 20:20:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:16,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504938288] [2024-06-27 20:20:16,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504938288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:16,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:16,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:16,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348689361] [2024-06-27 20:20:16,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:16,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:17,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:17,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 285 transitions, 2562 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:17,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:17,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:17,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:18,274 INFO L124 PetriNetUnfolderBase]: 3647/5457 cut-off events. [2024-06-27 20:20:18,274 INFO L125 PetriNetUnfolderBase]: For 979135/979140 co-relation queries the response was YES. [2024-06-27 20:20:18,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52580 conditions, 5457 events. 3647/5457 cut-off events. For 979135/979140 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 27561 event pairs, 1600 based on Foata normal form. 6/5452 useless extension candidates. Maximal degree in co-relation 52471. Up to 5210 conditions per place. [2024-06-27 20:20:18,337 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 237 selfloop transitions, 27 changer transitions 0/294 dead transitions. [2024-06-27 20:20:18,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 294 transitions, 3112 flow [2024-06-27 20:20:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:20:18,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 20:20:18,338 INFO L175 Difference]: Start difference. First operand has 229 places, 285 transitions, 2562 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:20:18,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 294 transitions, 3112 flow [2024-06-27 20:20:19,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 294 transitions, 3006 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:19,264 INFO L231 Difference]: Finished difference. Result has 229 places, 285 transitions, 2516 flow [2024-06-27 20:20:19,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2516, PETRI_PLACES=229, PETRI_TRANSITIONS=285} [2024-06-27 20:20:19,265 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-27 20:20:19,265 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 285 transitions, 2516 flow [2024-06-27 20:20:19,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:19,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:19,265 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 20:20:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:20:19,265 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:19,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1162971689, now seen corresponding path program 1 times [2024-06-27 20:20:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:19,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666365276] [2024-06-27 20:20:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:20,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666365276] [2024-06-27 20:20:20,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666365276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:20,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:20,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099208086] [2024-06-27 20:20:20,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:20,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:20,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:20,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:20,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 285 transitions, 2516 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 20:20:20,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:20,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:20,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:21,955 INFO L124 PetriNetUnfolderBase]: 4495/6899 cut-off events. [2024-06-27 20:20:21,955 INFO L125 PetriNetUnfolderBase]: For 1097086/1097092 co-relation queries the response was YES. [2024-06-27 20:20:22,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61411 conditions, 6899 events. 4495/6899 cut-off events. For 1097086/1097092 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 38863 event pairs, 933 based on Foata normal form. 20/6912 useless extension candidates. Maximal degree in co-relation 61301. Up to 4897 conditions per place. [2024-06-27 20:20:22,037 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 346 selfloop transitions, 161 changer transitions 0/520 dead transitions. [2024-06-27 20:20:22,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 520 transitions, 5379 flow [2024-06-27 20:20:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-27 20:20:22,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834710743801653 [2024-06-27 20:20:22,039 INFO L175 Difference]: Start difference. First operand has 229 places, 285 transitions, 2516 flow. Second operand 11 states and 234 transitions. [2024-06-27 20:20:22,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 520 transitions, 5379 flow [2024-06-27 20:20:23,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 520 transitions, 5303 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:23,113 INFO L231 Difference]: Finished difference. Result has 239 places, 416 transitions, 4182 flow [2024-06-27 20:20:23,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4182, PETRI_PLACES=239, PETRI_TRANSITIONS=416} [2024-06-27 20:20:23,113 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-27 20:20:23,113 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 416 transitions, 4182 flow [2024-06-27 20:20:23,113 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 20:20:23,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:23,114 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 20:20:23,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:20:23,114 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 20:20:23,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1861925767, now seen corresponding path program 2 times [2024-06-27 20:20:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476532302] [2024-06-27 20:20:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:24,200 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 20:20:24,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:24,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476532302] [2024-06-27 20:20:24,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476532302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:24,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:24,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:24,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615897283] [2024-06-27 20:20:24,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:24,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:24,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:24,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:24,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:24,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 416 transitions, 4182 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 20:20:24,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:24,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:24,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:26,382 INFO L124 PetriNetUnfolderBase]: 4842/7472 cut-off events. [2024-06-27 20:20:26,382 INFO L125 PetriNetUnfolderBase]: For 1194823/1194845 co-relation queries the response was YES. [2024-06-27 20:20:26,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69603 conditions, 7472 events. 4842/7472 cut-off events. For 1194823/1194845 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 43138 event pairs, 1029 based on Foata normal form. 36/7505 useless extension candidates. Maximal degree in co-relation 69486. Up to 5712 conditions per place. [2024-06-27 20:20:26,476 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 359 selfloop transitions, 177 changer transitions 0/549 dead transitions. [2024-06-27 20:20:26,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 549 transitions, 6461 flow [2024-06-27 20:20:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-27 20:20:26,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 20:20:26,477 INFO L175 Difference]: Start difference. First operand has 239 places, 416 transitions, 4182 flow. Second operand 12 states and 256 transitions. [2024-06-27 20:20:26,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 549 transitions, 6461 flow [2024-06-27 20:20:27,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 549 transitions, 6418 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 20:20:27,938 INFO L231 Difference]: Finished difference. Result has 254 places, 448 transitions, 5049 flow [2024-06-27 20:20:27,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5049, PETRI_PLACES=254, PETRI_TRANSITIONS=448} [2024-06-27 20:20:27,939 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-27 20:20:27,939 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 448 transitions, 5049 flow [2024-06-27 20:20:27,939 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 20:20:27,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:27,939 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 20:20:27,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:20:27,940 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 20:20:27,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2070761439, now seen corresponding path program 3 times [2024-06-27 20:20:27,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:27,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883915568] [2024-06-27 20:20:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:29,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:29,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883915568] [2024-06-27 20:20:29,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883915568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:29,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:29,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962855178] [2024-06-27 20:20:29,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:29,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:29,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:29,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 448 transitions, 5049 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 20:20:29,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:29,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:29,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:31,361 INFO L124 PetriNetUnfolderBase]: 4900/7570 cut-off events. [2024-06-27 20:20:31,361 INFO L125 PetriNetUnfolderBase]: For 1236705/1236727 co-relation queries the response was YES. [2024-06-27 20:20:31,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72264 conditions, 7570 events. 4900/7570 cut-off events. For 1236705/1236727 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43924 event pairs, 1040 based on Foata normal form. 36/7603 useless extension candidates. Maximal degree in co-relation 72140. Up to 5889 conditions per place. [2024-06-27 20:20:31,446 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 363 selfloop transitions, 177 changer transitions 0/553 dead transitions. [2024-06-27 20:20:31,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 553 transitions, 7022 flow [2024-06-27 20:20:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:20:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:20:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-27 20:20:31,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737762237762238 [2024-06-27 20:20:31,447 INFO L175 Difference]: Start difference. First operand has 254 places, 448 transitions, 5049 flow. Second operand 13 states and 271 transitions. [2024-06-27 20:20:31,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 553 transitions, 7022 flow [2024-06-27 20:20:32,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 553 transitions, 6806 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:20:32,694 INFO L231 Difference]: Finished difference. Result has 265 places, 455 transitions, 5318 flow [2024-06-27 20:20:32,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5318, PETRI_PLACES=265, PETRI_TRANSITIONS=455} [2024-06-27 20:20:32,695 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-27 20:20:32,695 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 455 transitions, 5318 flow [2024-06-27 20:20:32,695 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 20:20:32,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:32,695 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 20:20:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:20:32,695 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 20:20:32,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2070756789, now seen corresponding path program 4 times [2024-06-27 20:20:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:32,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79172493] [2024-06-27 20:20:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:32,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:33,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:33,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79172493] [2024-06-27 20:20:33,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79172493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:33,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:33,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:33,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300815191] [2024-06-27 20:20:33,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:33,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:33,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:34,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:34,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 455 transitions, 5318 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 20:20:34,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:34,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:34,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:36,213 INFO L124 PetriNetUnfolderBase]: 4848/7489 cut-off events. [2024-06-27 20:20:36,214 INFO L125 PetriNetUnfolderBase]: For 1228944/1228966 co-relation queries the response was YES. [2024-06-27 20:20:36,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70955 conditions, 7489 events. 4848/7489 cut-off events. For 1228944/1228966 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43342 event pairs, 1038 based on Foata normal form. 48/7534 useless extension candidates. Maximal degree in co-relation 70826. Up to 6037 conditions per place. [2024-06-27 20:20:36,301 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 364 selfloop transitions, 174 changer transitions 0/551 dead transitions. [2024-06-27 20:20:36,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 551 transitions, 6928 flow [2024-06-27 20:20:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:20:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:20:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 282 transitions. [2024-06-27 20:20:36,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-27 20:20:36,302 INFO L175 Difference]: Start difference. First operand has 265 places, 455 transitions, 5318 flow. Second operand 14 states and 282 transitions. [2024-06-27 20:20:36,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 551 transitions, 6928 flow [2024-06-27 20:20:37,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 551 transitions, 6546 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:37,865 INFO L231 Difference]: Finished difference. Result has 273 places, 459 transitions, 5351 flow [2024-06-27 20:20:37,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5351, PETRI_PLACES=273, PETRI_TRANSITIONS=459} [2024-06-27 20:20:37,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-27 20:20:37,865 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 459 transitions, 5351 flow [2024-06-27 20:20:37,865 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 20:20:37,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:37,865 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 20:20:37,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:20:37,866 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:37,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:37,866 INFO L85 PathProgramCache]: Analyzing trace with hash -788585000, now seen corresponding path program 1 times [2024-06-27 20:20:37,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:37,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936675693] [2024-06-27 20:20:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:37,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:38,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:38,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936675693] [2024-06-27 20:20:38,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936675693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:38,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:38,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:38,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16958915] [2024-06-27 20:20:38,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:38,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:38,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:38,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:38,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:38,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 459 transitions, 5351 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 20:20:38,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:38,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:38,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:40,769 INFO L124 PetriNetUnfolderBase]: 5162/7905 cut-off events. [2024-06-27 20:20:40,769 INFO L125 PetriNetUnfolderBase]: For 1224192/1224213 co-relation queries the response was YES. [2024-06-27 20:20:40,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74276 conditions, 7905 events. 5162/7905 cut-off events. For 1224192/1224213 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 44802 event pairs, 1316 based on Foata normal form. 21/7914 useless extension candidates. Maximal degree in co-relation 74144. Up to 7127 conditions per place. [2024-06-27 20:20:40,860 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 390 selfloop transitions, 72 changer transitions 0/509 dead transitions. [2024-06-27 20:20:40,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 509 transitions, 6756 flow [2024-06-27 20:20:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:20:40,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 20:20:40,861 INFO L175 Difference]: Start difference. First operand has 273 places, 459 transitions, 5351 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:20:40,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 509 transitions, 6756 flow [2024-06-27 20:20:42,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 509 transitions, 6401 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 20:20:42,460 INFO L231 Difference]: Finished difference. Result has 276 places, 478 transitions, 5442 flow [2024-06-27 20:20:42,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5442, PETRI_PLACES=276, PETRI_TRANSITIONS=478} [2024-06-27 20:20:42,461 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-27 20:20:42,461 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 478 transitions, 5442 flow [2024-06-27 20:20:42,461 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 20:20:42,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:42,461 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 20:20:42,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:20:42,462 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:42,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:42,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1670517400, now seen corresponding path program 2 times [2024-06-27 20:20:42,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:42,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738903883] [2024-06-27 20:20:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:42,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:43,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:43,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738903883] [2024-06-27 20:20:43,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738903883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:43,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:43,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:43,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107293244] [2024-06-27 20:20:43,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:43,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:43,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:43,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 478 transitions, 5442 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 20:20:43,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:43,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:43,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:45,748 INFO L124 PetriNetUnfolderBase]: 5263/8055 cut-off events. [2024-06-27 20:20:45,748 INFO L125 PetriNetUnfolderBase]: For 1259475/1259502 co-relation queries the response was YES. [2024-06-27 20:20:45,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76372 conditions, 8055 events. 5263/8055 cut-off events. For 1259475/1259502 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45930 event pairs, 1444 based on Foata normal form. 27/8070 useless extension candidates. Maximal degree in co-relation 76236. Up to 7207 conditions per place. [2024-06-27 20:20:45,855 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 408 selfloop transitions, 100 changer transitions 0/555 dead transitions. [2024-06-27 20:20:45,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 555 transitions, 7676 flow [2024-06-27 20:20:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:20:45,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-27 20:20:45,857 INFO L175 Difference]: Start difference. First operand has 276 places, 478 transitions, 5442 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:20:45,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 555 transitions, 7676 flow [2024-06-27 20:20:47,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 555 transitions, 7429 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:47,605 INFO L231 Difference]: Finished difference. Result has 287 places, 524 transitions, 6207 flow [2024-06-27 20:20:47,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5291, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6207, PETRI_PLACES=287, PETRI_TRANSITIONS=524} [2024-06-27 20:20:47,606 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-27 20:20:47,606 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 524 transitions, 6207 flow [2024-06-27 20:20:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:47,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:47,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:47,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:20:47,607 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:47,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:47,607 INFO L85 PathProgramCache]: Analyzing trace with hash 724536075, now seen corresponding path program 5 times [2024-06-27 20:20:47,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:47,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937725644] [2024-06-27 20:20:47,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:47,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:48,476 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 20:20:48,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:48,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937725644] [2024-06-27 20:20:48,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937725644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:48,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:48,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:48,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245478220] [2024-06-27 20:20:48,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:48,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:48,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:48,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:48,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 524 transitions, 6207 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:48,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:48,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:48,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:50,866 INFO L124 PetriNetUnfolderBase]: 5969/9375 cut-off events. [2024-06-27 20:20:50,866 INFO L125 PetriNetUnfolderBase]: For 1454375/1454414 co-relation queries the response was YES. [2024-06-27 20:20:50,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87942 conditions, 9375 events. 5969/9375 cut-off events. For 1454375/1454414 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 58326 event pairs, 992 based on Foata normal form. 30/9397 useless extension candidates. Maximal degree in co-relation 87800. Up to 4307 conditions per place. [2024-06-27 20:20:51,001 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 345 selfloop transitions, 292 changer transitions 0/650 dead transitions. [2024-06-27 20:20:51,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 650 transitions, 9251 flow [2024-06-27 20:20:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 20:20:51,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:20:51,002 INFO L175 Difference]: Start difference. First operand has 287 places, 524 transitions, 6207 flow. Second operand 10 states and 220 transitions. [2024-06-27 20:20:51,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 650 transitions, 9251 flow [2024-06-27 20:20:53,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 650 transitions, 9154 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 20:20:53,573 INFO L231 Difference]: Finished difference. Result has 299 places, 570 transitions, 7467 flow [2024-06-27 20:20:53,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6110, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7467, PETRI_PLACES=299, PETRI_TRANSITIONS=570} [2024-06-27 20:20:53,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-27 20:20:53,574 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 570 transitions, 7467 flow [2024-06-27 20:20:53,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:53,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:53,574 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 20:20:53,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:20:53,575 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:53,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1854533847, now seen corresponding path program 6 times [2024-06-27 20:20:53,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:53,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517932448] [2024-06-27 20:20:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:53,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:54,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:54,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517932448] [2024-06-27 20:20:54,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517932448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:54,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:54,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:54,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416455622] [2024-06-27 20:20:54,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:54,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:54,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:54,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:54,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:54,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 570 transitions, 7467 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:54,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:54,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:54,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:57,109 INFO L124 PetriNetUnfolderBase]: 6938/10925 cut-off events. [2024-06-27 20:20:57,109 INFO L125 PetriNetUnfolderBase]: For 1651153/1651177 co-relation queries the response was YES. [2024-06-27 20:20:57,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102948 conditions, 10925 events. 6938/10925 cut-off events. For 1651153/1651177 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 69994 event pairs, 1602 based on Foata normal form. 40/10958 useless extension candidates. Maximal degree in co-relation 102800. Up to 5880 conditions per place. [2024-06-27 20:20:57,271 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 390 selfloop transitions, 374 changer transitions 0/777 dead transitions. [2024-06-27 20:20:57,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 777 transitions, 11737 flow [2024-06-27 20:20:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 20:20:57,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49772727272727274 [2024-06-27 20:20:57,272 INFO L175 Difference]: Start difference. First operand has 299 places, 570 transitions, 7467 flow. Second operand 10 states and 219 transitions. [2024-06-27 20:20:57,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 777 transitions, 11737 flow [2024-06-27 20:21:00,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 777 transitions, 11380 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 20:21:00,394 INFO L231 Difference]: Finished difference. Result has 310 places, 679 transitions, 9605 flow [2024-06-27 20:21:00,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9605, PETRI_PLACES=310, PETRI_TRANSITIONS=679} [2024-06-27 20:21:00,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-27 20:21:00,396 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 679 transitions, 9605 flow [2024-06-27 20:21:00,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:00,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:00,396 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 20:21:00,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:21:00,397 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:00,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash -967624411, now seen corresponding path program 7 times [2024-06-27 20:21:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:00,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397734527] [2024-06-27 20:21:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:01,364 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 20:21:01,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397734527] [2024-06-27 20:21:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397734527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:01,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:01,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210699692] [2024-06-27 20:21:01,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:01,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:01,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:01,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:01,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 679 transitions, 9605 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:01,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:01,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:01,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:04,540 INFO L124 PetriNetUnfolderBase]: 7231/11429 cut-off events. [2024-06-27 20:21:04,540 INFO L125 PetriNetUnfolderBase]: For 1781277/1781311 co-relation queries the response was YES. [2024-06-27 20:21:04,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111851 conditions, 11429 events. 7231/11429 cut-off events. For 1781277/1781311 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 74440 event pairs, 1853 based on Foata normal form. 48/11476 useless extension candidates. Maximal degree in co-relation 111697. Up to 8177 conditions per place. [2024-06-27 20:21:04,715 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 428 selfloop transitions, 337 changer transitions 0/778 dead transitions. [2024-06-27 20:21:04,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 778 transitions, 12708 flow [2024-06-27 20:21:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-27 20:21:04,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-06-27 20:21:04,716 INFO L175 Difference]: Start difference. First operand has 310 places, 679 transitions, 9605 flow. Second operand 10 states and 222 transitions. [2024-06-27 20:21:04,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 778 transitions, 12708 flow [2024-06-27 20:21:09,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 778 transitions, 12479 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:09,187 INFO L231 Difference]: Finished difference. Result has 319 places, 694 transitions, 10607 flow [2024-06-27 20:21:09,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9386, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10607, PETRI_PLACES=319, PETRI_TRANSITIONS=694} [2024-06-27 20:21:09,188 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-27 20:21:09,188 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 694 transitions, 10607 flow [2024-06-27 20:21:09,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:09,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:09,188 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 20:21:09,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:21:09,188 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:09,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1909611181, now seen corresponding path program 8 times [2024-06-27 20:21:09,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:09,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141771975] [2024-06-27 20:21:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:10,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141771975] [2024-06-27 20:21:10,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141771975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:10,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:10,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:10,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836673886] [2024-06-27 20:21:10,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:10,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:10,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:10,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 694 transitions, 10607 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:10,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:10,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:10,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:14,109 INFO L124 PetriNetUnfolderBase]: 7172/11340 cut-off events. [2024-06-27 20:21:14,109 INFO L125 PetriNetUnfolderBase]: For 1720621/1720655 co-relation queries the response was YES. [2024-06-27 20:21:14,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110740 conditions, 11340 events. 7172/11340 cut-off events. For 1720621/1720655 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 73726 event pairs, 1938 based on Foata normal form. 54/11393 useless extension candidates. Maximal degree in co-relation 110583. Up to 8577 conditions per place. [2024-06-27 20:21:14,277 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 433 selfloop transitions, 326 changer transitions 0/772 dead transitions. [2024-06-27 20:21:14,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 772 transitions, 13088 flow [2024-06-27 20:21:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 20:21:14,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-27 20:21:14,279 INFO L175 Difference]: Start difference. First operand has 319 places, 694 transitions, 10607 flow. Second operand 10 states and 218 transitions. [2024-06-27 20:21:14,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 772 transitions, 13088 flow [2024-06-27 20:21:17,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 772 transitions, 12683 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:17,906 INFO L231 Difference]: Finished difference. Result has 325 places, 695 transitions, 10905 flow [2024-06-27 20:21:17,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10208, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10905, PETRI_PLACES=325, PETRI_TRANSITIONS=695} [2024-06-27 20:21:17,907 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-27 20:21:17,907 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 695 transitions, 10905 flow [2024-06-27 20:21:17,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:17,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:17,907 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 20:21:17,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:21:17,907 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:17,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1909731151, now seen corresponding path program 9 times [2024-06-27 20:21:17,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:17,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921581585] [2024-06-27 20:21:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:18,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:18,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921581585] [2024-06-27 20:21:18,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921581585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:18,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:18,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:18,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418698425] [2024-06-27 20:21:18,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:18,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:18,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:18,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:18,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 695 transitions, 10905 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:18,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:18,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:18,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:22,470 INFO L124 PetriNetUnfolderBase]: 7220/11407 cut-off events. [2024-06-27 20:21:22,470 INFO L125 PetriNetUnfolderBase]: For 1663673/1663707 co-relation queries the response was YES. [2024-06-27 20:21:22,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111300 conditions, 11407 events. 7220/11407 cut-off events. For 1663673/1663707 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 74204 event pairs, 1791 based on Foata normal form. 48/11454 useless extension candidates. Maximal degree in co-relation 111141. Up to 7782 conditions per place. [2024-06-27 20:21:22,627 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 421 selfloop transitions, 348 changer transitions 0/782 dead transitions. [2024-06-27 20:21:22,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 782 transitions, 13507 flow [2024-06-27 20:21:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 20:21:22,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:21:22,628 INFO L175 Difference]: Start difference. First operand has 325 places, 695 transitions, 10905 flow. Second operand 10 states and 220 transitions. [2024-06-27 20:21:22,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 782 transitions, 13507 flow [2024-06-27 20:21:25,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 782 transitions, 12855 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:25,757 INFO L231 Difference]: Finished difference. Result has 329 places, 700 transitions, 11111 flow [2024-06-27 20:21:25,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10259, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11111, PETRI_PLACES=329, PETRI_TRANSITIONS=700} [2024-06-27 20:21:25,758 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-27 20:21:25,758 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 700 transitions, 11111 flow [2024-06-27 20:21:25,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:25,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:25,758 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 20:21:25,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:21:25,758 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 20:21:25,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:25,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1729609950, now seen corresponding path program 3 times [2024-06-27 20:21:25,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:25,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158392025] [2024-06-27 20:21:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:25,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:26,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158392025] [2024-06-27 20:21:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158392025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:26,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:26,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:21:26,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270934154] [2024-06-27 20:21:26,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:26,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:21:26,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:21:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:21:26,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:26,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 700 transitions, 11111 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:26,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:26,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:26,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:29,991 INFO L124 PetriNetUnfolderBase]: 7590/11896 cut-off events. [2024-06-27 20:21:29,991 INFO L125 PetriNetUnfolderBase]: For 1674645/1674681 co-relation queries the response was YES. [2024-06-27 20:21:30,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117616 conditions, 11896 events. 7590/11896 cut-off events. For 1674645/1674681 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 76304 event pairs, 2306 based on Foata normal form. 33/11911 useless extension candidates. Maximal degree in co-relation 117455. Up to 10588 conditions per place. [2024-06-27 20:21:30,163 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 550 selfloop transitions, 144 changer transitions 0/748 dead transitions. [2024-06-27 20:21:30,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 748 transitions, 13295 flow [2024-06-27 20:21:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 20:21:30,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 20:21:30,164 INFO L175 Difference]: Start difference. First operand has 329 places, 700 transitions, 11111 flow. Second operand 8 states and 167 transitions. [2024-06-27 20:21:30,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 748 transitions, 13295 flow [2024-06-27 20:21:34,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 748 transitions, 12579 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:34,118 INFO L231 Difference]: Finished difference. Result has 332 places, 722 transitions, 11183 flow [2024-06-27 20:21:34,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10409, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11183, PETRI_PLACES=332, PETRI_TRANSITIONS=722} [2024-06-27 20:21:34,119 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-27 20:21:34,119 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 722 transitions, 11183 flow [2024-06-27 20:21:34,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:34,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:34,119 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 20:21:34,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:21:34,119 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 20:21:34,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash -788256307, now seen corresponding path program 1 times [2024-06-27 20:21:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:34,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660311662] [2024-06-27 20:21:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:34,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:34,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660311662] [2024-06-27 20:21:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660311662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:34,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:34,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:34,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086976165] [2024-06-27 20:21:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:34,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:34,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:34,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:21:34,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 722 transitions, 11183 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:34,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:34,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:21:34,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:38,392 INFO L124 PetriNetUnfolderBase]: 7749/12064 cut-off events. [2024-06-27 20:21:38,392 INFO L125 PetriNetUnfolderBase]: For 1668480/1668510 co-relation queries the response was YES. [2024-06-27 20:21:38,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117742 conditions, 12064 events. 7749/12064 cut-off events. For 1668480/1668510 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 76724 event pairs, 2650 based on Foata normal form. 26/12067 useless extension candidates. Maximal degree in co-relation 117579. Up to 11060 conditions per place. [2024-06-27 20:21:38,796 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 607 selfloop transitions, 107 changer transitions 0/760 dead transitions. [2024-06-27 20:21:38,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 760 transitions, 13257 flow [2024-06-27 20:21:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:21:38,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-27 20:21:38,798 INFO L175 Difference]: Start difference. First operand has 332 places, 722 transitions, 11183 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:21:38,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 760 transitions, 13257 flow [2024-06-27 20:21:41,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 760 transitions, 13148 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 20:21:41,823 INFO L231 Difference]: Finished difference. Result has 340 places, 734 transitions, 11586 flow [2024-06-27 20:21:41,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11084, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11586, PETRI_PLACES=340, PETRI_TRANSITIONS=734} [2024-06-27 20:21:41,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-27 20:21:41,823 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 734 transitions, 11586 flow [2024-06-27 20:21:41,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:41,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:41,824 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 20:21:41,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:21:41,824 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:41,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash -454778405, now seen corresponding path program 10 times [2024-06-27 20:21:41,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:41,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736380404] [2024-06-27 20:21:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:41,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:42,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:42,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736380404] [2024-06-27 20:21:42,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736380404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:42,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:42,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:21:42,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469754556] [2024-06-27 20:21:42,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:42,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:21:42,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:21:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:21:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:43,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 734 transitions, 11586 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 20:21:43,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:43,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:43,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:47,007 INFO L124 PetriNetUnfolderBase]: 7940/12519 cut-off events. [2024-06-27 20:21:47,007 INFO L125 PetriNetUnfolderBase]: For 1818388/1818400 co-relation queries the response was YES. [2024-06-27 20:21:47,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124191 conditions, 12519 events. 7940/12519 cut-off events. For 1818388/1818400 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 82842 event pairs, 2313 based on Foata normal form. 34/12548 useless extension candidates. Maximal degree in co-relation 124025. Up to 10210 conditions per place. [2024-06-27 20:21:47,182 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 664 selfloop transitions, 208 changer transitions 0/888 dead transitions. [2024-06-27 20:21:47,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 888 transitions, 15429 flow [2024-06-27 20:21:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-27 20:21:47,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2024-06-27 20:21:47,183 INFO L175 Difference]: Start difference. First operand has 340 places, 734 transitions, 11586 flow. Second operand 11 states and 238 transitions. [2024-06-27 20:21:47,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 888 transitions, 15429 flow [2024-06-27 20:21:50,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 888 transitions, 15310 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 20:21:50,996 INFO L231 Difference]: Finished difference. Result has 352 places, 812 transitions, 13544 flow [2024-06-27 20:21:50,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11467, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13544, PETRI_PLACES=352, PETRI_TRANSITIONS=812} [2024-06-27 20:21:50,997 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-27 20:21:50,997 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 812 transitions, 13544 flow [2024-06-27 20:21:50,997 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 20:21:50,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:50,997 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 20:21:50,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:21:50,998 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:50,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:50,998 INFO L85 PathProgramCache]: Analyzing trace with hash 73362673, now seen corresponding path program 11 times [2024-06-27 20:21:50,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:50,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135288688] [2024-06-27 20:21:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:50,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:52,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135288688] [2024-06-27 20:21:52,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135288688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:52,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:52,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:21:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193403780] [2024-06-27 20:21:52,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:52,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:21:52,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:21:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:21:52,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:52,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 812 transitions, 13544 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 20:21:52,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:52,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:52,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:56,975 INFO L124 PetriNetUnfolderBase]: 8076/12763 cut-off events. [2024-06-27 20:21:56,975 INFO L125 PetriNetUnfolderBase]: For 1905874/1905886 co-relation queries the response was YES. [2024-06-27 20:21:57,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128341 conditions, 12763 events. 8076/12763 cut-off events. For 1905874/1905886 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 85037 event pairs, 2450 based on Foata normal form. 46/12804 useless extension candidates. Maximal degree in co-relation 128169. Up to 10988 conditions per place. [2024-06-27 20:21:57,190 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 672 selfloop transitions, 201 changer transitions 0/889 dead transitions. [2024-06-27 20:21:57,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 889 transitions, 15846 flow [2024-06-27 20:21:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:21:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:21:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 266 transitions. [2024-06-27 20:21:57,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46503496503496505 [2024-06-27 20:21:57,191 INFO L175 Difference]: Start difference. First operand has 352 places, 812 transitions, 13544 flow. Second operand 13 states and 266 transitions. [2024-06-27 20:21:57,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 889 transitions, 15846 flow