./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:43:06,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:43:06,786 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:43:06,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:43:06,791 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:43:06,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:43:06,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:43:06,815 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:43:06,815 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:43:06,818 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:43:06,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:43:06,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:43:06,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:43:06,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:43:06,820 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:43:06,820 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:43:06,820 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:43:06,821 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:43:06,821 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:43:06,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:43:06,821 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:43:06,822 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:43:06,822 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:43:06,822 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:43:06,822 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:43:06,822 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:43:06,822 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:43:06,823 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:43:06,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:43:06,823 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:43:06,824 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:43:06,824 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:43:06,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:43:06,825 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:43:06,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:43:06,825 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:43:06,825 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:43:06,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:43:06,825 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:43:06,826 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:43:06,826 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:43:06,826 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:43:06,826 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:43:06,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:43:07,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:43:07,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:43:07,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:43:07,110 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:43:07,110 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:43:07,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 20:43:07,279 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:43:07,280 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:43:07,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 20:43:08,227 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:43:08,467 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:43:08,467 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 20:43:08,480 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afee8fe9/abd6ed56d09e49fb91271675d8402e30/FLAG4dcdb311a [2024-06-27 20:43:08,490 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afee8fe9/abd6ed56d09e49fb91271675d8402e30 [2024-06-27 20:43:08,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:43:08,491 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:43:08,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:43:08,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:43:08,495 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:43:08,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:07" (1/2) ... [2024-06-27 20:43:08,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5e8d26 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:08, skipping insertion in model container [2024-06-27 20:43:08,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:07" (1/2) ... [2024-06-27 20:43:08,497 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f5d236 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:08, skipping insertion in model container [2024-06-27 20:43:08,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:43:08" (2/2) ... [2024-06-27 20:43:08,497 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5e8d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:08, skipping insertion in model container [2024-06-27 20:43:08,498 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:43:08" (2/2) ... [2024-06-27 20:43:08,498 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:43:08,564 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:43:08,564 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-27 20:43:08,564 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-27 20:43:08,565 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-27 20:43:08,565 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:43:08,565 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-27 20:43:08,600 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:43:08,898 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:43:08,906 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:43:08,989 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:43:09,016 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:43:09,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09 WrapperNode [2024-06-27 20:43:09,017 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:43:09,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:43:09,018 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:43:09,018 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:43:09,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,076 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-27 20:43:09,083 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:43:09,083 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:43:09,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:43:09,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:43:09,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,103 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,121 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 20:43:09,121 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,128 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,129 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,131 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,132 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,137 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:43:09,138 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:43:09,138 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:43:09,138 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:43:09,139 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (1/1) ... [2024-06-27 20:43:09,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:43:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:43:09,171 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 20:43:09,188 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 20:43:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:43:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:43:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:43:09,206 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:43:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:43:09,206 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:43:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:43:09,206 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:43:09,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:43:09,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:43:09,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:43:09,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:43:09,208 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 20:43:09,334 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:43:09,337 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:43:09,638 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:43:09,638 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:43:09,783 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:43:09,783 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:43:09,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:43:09 BoogieIcfgContainer [2024-06-27 20:43:09,784 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:43:09,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:43:09,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:43:09,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:43:09,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:07" (1/4) ... [2024-06-27 20:43:09,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5932c262 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:43:09, skipping insertion in model container [2024-06-27 20:43:09,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:43:08" (2/4) ... [2024-06-27 20:43:09,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5932c262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:43:09, skipping insertion in model container [2024-06-27 20:43:09,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:09" (3/4) ... [2024-06-27 20:43:09,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5932c262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:43:09, skipping insertion in model container [2024-06-27 20:43:09,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:43:09" (4/4) ... [2024-06-27 20:43:09,792 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 20:43:09,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:43:09,804 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:43:09,804 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:43:09,857 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:43:09,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:43:09,909 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 20:43:09,909 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:43:09,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:43:09,911 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:43:09,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 20:43:09,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:43:09,928 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;@52f81116, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:43:09,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:43:09,933 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:43:09,933 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:43:09,933 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:43:09,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:09,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:43:09,935 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 20:43:09,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:09,939 INFO L85 PathProgramCache]: Analyzing trace with hash 403727084, now seen corresponding path program 1 times [2024-06-27 20:43:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965612786] [2024-06-27 20:43:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:09,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:10,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:10,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965612786] [2024-06-27 20:43:10,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965612786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:10,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:10,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:43:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783635724] [2024-06-27 20:43:10,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:10,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:43:10,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:10,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:43:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:43:10,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 20:43:10,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:10,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:10,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 20:43:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:11,024 INFO L124 PetriNetUnfolderBase]: 1152/1770 cut-off events. [2024-06-27 20:43:11,024 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:43:11,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 1770 events. 1152/1770 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8412 event pairs, 785 based on Foata normal form. 1/1731 useless extension candidates. Maximal degree in co-relation 3575. Up to 1732 conditions per place. [2024-06-27 20:43:11,038 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 20:43:11,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 167 flow [2024-06-27 20:43:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:43:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:43:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 20:43:11,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 20:43:11,049 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 71 transitions. [2024-06-27 20:43:11,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 167 flow [2024-06-27 20:43:11,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:11,053 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 20:43:11,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 20:43:11,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 20:43:11,057 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 20:43:11,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:11,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:11,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:11,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:43:11,058 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 20:43:11,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1526065087, now seen corresponding path program 1 times [2024-06-27 20:43:11,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:11,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123640888] [2024-06-27 20:43:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123640888] [2024-06-27 20:43:11,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123640888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:11,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:11,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:43:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781330741] [2024-06-27 20:43:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:11,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:43:11,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:11,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:43:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:43:11,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:43:11,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:11,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:11,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:43:11,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:11,917 INFO L124 PetriNetUnfolderBase]: 1389/2124 cut-off events. [2024-06-27 20:43:11,917 INFO L125 PetriNetUnfolderBase]: For 400/405 co-relation queries the response was YES. [2024-06-27 20:43:11,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4858 conditions, 2124 events. 1389/2124 cut-off events. For 400/405 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9968 event pairs, 621 based on Foata normal form. 10/2128 useless extension candidates. Maximal degree in co-relation 4846. Up to 2033 conditions per place. [2024-06-27 20:43:11,929 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 20:43:11,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 244 flow [2024-06-27 20:43:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:43:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:43:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-27 20:43:11,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 20:43:11,932 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 91 transitions. [2024-06-27 20:43:11,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 244 flow [2024-06-27 20:43:11,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:43:11,934 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-27 20:43:11,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 20:43:11,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-27 20:43:11,935 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-27 20:43:11,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:11,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:11,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:11,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:43:11,938 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 20:43:11,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:11,939 INFO L85 PathProgramCache]: Analyzing trace with hash 160299932, now seen corresponding path program 1 times [2024-06-27 20:43:11,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:11,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349677794] [2024-06-27 20:43:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:11,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:12,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349677794] [2024-06-27 20:43:12,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349677794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:12,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:12,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141949469] [2024-06-27 20:43:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:12,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:43:12,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:12,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:12,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:43:12,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:13,300 INFO L124 PetriNetUnfolderBase]: 1380/2107 cut-off events. [2024-06-27 20:43:13,301 INFO L125 PetriNetUnfolderBase]: For 1135/1145 co-relation queries the response was YES. [2024-06-27 20:43:13,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5347 conditions, 2107 events. 1380/2107 cut-off events. For 1135/1145 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9882 event pairs, 481 based on Foata normal form. 14/2113 useless extension candidates. Maximal degree in co-relation 5333. Up to 1988 conditions per place. [2024-06-27 20:43:13,310 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2024-06-27 20:43:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 300 flow [2024-06-27 20:43:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:43:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:43:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-27 20:43:13,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-06-27 20:43:13,312 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 107 transitions. [2024-06-27 20:43:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 300 flow [2024-06-27 20:43:13,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:43:13,315 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 155 flow [2024-06-27 20:43:13,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-06-27 20:43:13,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-27 20:43:13,315 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 155 flow [2024-06-27 20:43:13,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:13,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:13,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:13,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:43:13,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:13,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1494515606, now seen corresponding path program 1 times [2024-06-27 20:43:13,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:13,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693855608] [2024-06-27 20:43:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:13,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:13,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:13,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693855608] [2024-06-27 20:43:13,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693855608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:13,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:13,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:43:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194907218] [2024-06-27 20:43:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:13,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:43:13,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:43:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:43:13,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:43:13,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 155 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:13,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:13,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:43:13,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:14,064 INFO L124 PetriNetUnfolderBase]: 1126/1734 cut-off events. [2024-06-27 20:43:14,064 INFO L125 PetriNetUnfolderBase]: For 1698/1698 co-relation queries the response was YES. [2024-06-27 20:43:14,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4771 conditions, 1734 events. 1126/1734 cut-off events. For 1698/1698 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8160 event pairs, 594 based on Foata normal form. 2/1734 useless extension candidates. Maximal degree in co-relation 4755. Up to 1683 conditions per place. [2024-06-27 20:43:14,073 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 39 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-27 20:43:14,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 291 flow [2024-06-27 20:43:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:43:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:43:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:43:14,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-27 20:43:14,074 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 155 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:43:14,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 291 flow [2024-06-27 20:43:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 268 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:14,076 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 176 flow [2024-06-27 20:43:14,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 20:43:14,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-06-27 20:43:14,077 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 176 flow [2024-06-27 20:43:14,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:14,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:14,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:14,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:43:14,078 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:14,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash -906612192, now seen corresponding path program 1 times [2024-06-27 20:43:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:14,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350891868] [2024-06-27 20:43:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350891868] [2024-06-27 20:43:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350891868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:14,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:14,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780989146] [2024-06-27 20:43:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:14,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:14,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:43:14,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:14,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:14,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:43:14,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:15,038 INFO L124 PetriNetUnfolderBase]: 1121/1723 cut-off events. [2024-06-27 20:43:15,038 INFO L125 PetriNetUnfolderBase]: For 2508/2508 co-relation queries the response was YES. [2024-06-27 20:43:15,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5135 conditions, 1723 events. 1121/1723 cut-off events. For 2508/2508 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8162 event pairs, 579 based on Foata normal form. 2/1723 useless extension candidates. Maximal degree in co-relation 5117. Up to 1667 conditions per place. [2024-06-27 20:43:15,047 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-27 20:43:15,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 340 flow [2024-06-27 20:43:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 20:43:15,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:43:15,048 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 176 flow. Second operand 6 states and 105 transitions. [2024-06-27 20:43:15,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 340 flow [2024-06-27 20:43:15,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 320 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:15,051 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 210 flow [2024-06-27 20:43:15,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=6, PETRI_FLOW=210, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 20:43:15,052 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-27 20:43:15,052 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 210 flow [2024-06-27 20:43:15,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:15,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:15,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:15,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:43:15,053 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 20:43:15,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1306634323, now seen corresponding path program 1 times [2024-06-27 20:43:15,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:15,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780008924] [2024-06-27 20:43:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:15,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:15,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780008924] [2024-06-27 20:43:15,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780008924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:15,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:15,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:15,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392141199] [2024-06-27 20:43:15,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:15,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:15,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:15,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:15,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:15,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:15,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:15,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:15,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:15,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:16,064 INFO L124 PetriNetUnfolderBase]: 1382/2113 cut-off events. [2024-06-27 20:43:16,065 INFO L125 PetriNetUnfolderBase]: For 4314/4328 co-relation queries the response was YES. [2024-06-27 20:43:16,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6705 conditions, 2113 events. 1382/2113 cut-off events. For 4314/4328 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9928 event pairs, 520 based on Foata normal form. 16/2126 useless extension candidates. Maximal degree in co-relation 6686. Up to 2004 conditions per place. [2024-06-27 20:43:16,074 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 52 selfloop transitions, 14 changer transitions 0/70 dead transitions. [2024-06-27 20:43:16,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 422 flow [2024-06-27 20:43:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:43:16,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 20:43:16,075 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 210 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:43:16,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 422 flow [2024-06-27 20:43:16,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 392 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:16,079 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 258 flow [2024-06-27 20:43:16,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 20:43:16,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-27 20:43:16,079 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 258 flow [2024-06-27 20:43:16,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:16,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:16,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:16,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:43:16,080 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 20:43:16,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:16,081 INFO L85 PathProgramCache]: Analyzing trace with hash 261661045, now seen corresponding path program 2 times [2024-06-27 20:43:16,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:16,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743217078] [2024-06-27 20:43:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:16,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:16,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743217078] [2024-06-27 20:43:16,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743217078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:16,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:16,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:16,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869410748] [2024-06-27 20:43:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:16,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:16,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:16,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:16,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 258 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:16,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:16,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:16,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:16,977 INFO L124 PetriNetUnfolderBase]: 1388/2127 cut-off events. [2024-06-27 20:43:16,977 INFO L125 PetriNetUnfolderBase]: For 6169/6176 co-relation queries the response was YES. [2024-06-27 20:43:16,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7362 conditions, 2127 events. 1388/2127 cut-off events. For 6169/6176 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9991 event pairs, 512 based on Foata normal form. 8/2132 useless extension candidates. Maximal degree in co-relation 7341. Up to 1961 conditions per place. [2024-06-27 20:43:16,988 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 52 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-06-27 20:43:16,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 534 flow [2024-06-27 20:43:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 20:43:16,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-27 20:43:16,990 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 258 flow. Second operand 6 states and 109 transitions. [2024-06-27 20:43:16,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 534 flow [2024-06-27 20:43:16,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 508 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 20:43:16,994 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 340 flow [2024-06-27 20:43:16,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=340, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-27 20:43:16,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-27 20:43:16,995 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 340 flow [2024-06-27 20:43:16,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:16,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:16,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:16,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:43:16,996 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 20:43:16,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1484132077, now seen corresponding path program 1 times [2024-06-27 20:43:16,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:16,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373536992] [2024-06-27 20:43:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:16,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:17,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:17,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373536992] [2024-06-27 20:43:17,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373536992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:17,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:17,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:17,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701868100] [2024-06-27 20:43:17,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:17,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:17,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:17,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:17,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:17,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:17,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 20:43:17,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:17,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:17,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:18,279 INFO L124 PetriNetUnfolderBase]: 1345/2026 cut-off events. [2024-06-27 20:43:18,280 INFO L125 PetriNetUnfolderBase]: For 8149/8149 co-relation queries the response was YES. [2024-06-27 20:43:18,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 2026 events. 1345/2026 cut-off events. For 8149/8149 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9423 event pairs, 524 based on Foata normal form. 2/2026 useless extension candidates. Maximal degree in co-relation 7639. Up to 1977 conditions per place. [2024-06-27 20:43:18,294 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 61 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-27 20:43:18,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 578 flow [2024-06-27 20:43:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:43:18,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:43:18,298 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 340 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:43:18,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 578 flow [2024-06-27 20:43:18,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 548 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 20:43:18,302 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 400 flow [2024-06-27 20:43:18,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=400, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-27 20:43:18,304 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-27 20:43:18,304 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 400 flow [2024-06-27 20:43:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 20:43:18,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:18,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:18,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:43:18,305 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:18,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:18,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1297703964, now seen corresponding path program 1 times [2024-06-27 20:43:18,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:18,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975356002] [2024-06-27 20:43:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:18,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:18,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:18,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975356002] [2024-06-27 20:43:18,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975356002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:18,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:18,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:43:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361846877] [2024-06-27 20:43:18,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:43:18,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:43:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:43:18,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:18,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 400 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:18,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:18,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:18,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:19,096 INFO L124 PetriNetUnfolderBase]: 1613/2417 cut-off events. [2024-06-27 20:43:19,097 INFO L125 PetriNetUnfolderBase]: For 10759/10759 co-relation queries the response was YES. [2024-06-27 20:43:19,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9532 conditions, 2417 events. 1613/2417 cut-off events. For 10759/10759 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10934 event pairs, 559 based on Foata normal form. 2/2418 useless extension candidates. Maximal degree in co-relation 9506. Up to 2399 conditions per place. [2024-06-27 20:43:19,108 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 66 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-27 20:43:19,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 602 flow [2024-06-27 20:43:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:43:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:43:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-27 20:43:19,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-27 20:43:19,110 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 400 flow. Second operand 5 states and 78 transitions. [2024-06-27 20:43:19,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 602 flow [2024-06-27 20:43:19,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 560 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:19,118 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 426 flow [2024-06-27 20:43:19,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=426, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 20:43:19,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-27 20:43:19,118 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 426 flow [2024-06-27 20:43:19,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:19,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:19,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:19,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:43:19,119 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 20:43:19,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1959163430, now seen corresponding path program 1 times [2024-06-27 20:43:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:19,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264250379] [2024-06-27 20:43:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:19,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:19,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264250379] [2024-06-27 20:43:19,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264250379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:19,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:19,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197791147] [2024-06-27 20:43:19,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:19,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:19,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:19,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:19,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 426 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:19,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:19,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:19,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:20,320 INFO L124 PetriNetUnfolderBase]: 1518/2314 cut-off events. [2024-06-27 20:43:20,320 INFO L125 PetriNetUnfolderBase]: For 11432/11445 co-relation queries the response was YES. [2024-06-27 20:43:20,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 2314 events. 1518/2314 cut-off events. For 11432/11445 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10978 event pairs, 524 based on Foata normal form. 12/2324 useless extension candidates. Maximal degree in co-relation 9440. Up to 2194 conditions per place. [2024-06-27 20:43:20,332 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 64 selfloop transitions, 18 changer transitions 0/87 dead transitions. [2024-06-27 20:43:20,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 640 flow [2024-06-27 20:43:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:43:20,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 20:43:20,333 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 426 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:43:20,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 640 flow [2024-06-27 20:43:20,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 87 transitions, 622 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 20:43:20,342 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 456 flow [2024-06-27 20:43:20,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=456, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-06-27 20:43:20,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-27 20:43:20,344 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 456 flow [2024-06-27 20:43:20,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:20,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:20,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:20,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:43:20,344 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 20:43:20,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash -482160559, now seen corresponding path program 1 times [2024-06-27 20:43:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:20,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460635317] [2024-06-27 20:43:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:20,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:21,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:21,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460635317] [2024-06-27 20:43:21,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460635317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:21,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:21,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:21,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761234894] [2024-06-27 20:43:21,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:21,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:21,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:21,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:21,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:21,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:21,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 456 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:21,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:21,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:21,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:21,564 INFO L124 PetriNetUnfolderBase]: 1561/2387 cut-off events. [2024-06-27 20:43:21,565 INFO L125 PetriNetUnfolderBase]: For 13900/13917 co-relation queries the response was YES. [2024-06-27 20:43:21,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10060 conditions, 2387 events. 1561/2387 cut-off events. For 13900/13917 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11440 event pairs, 510 based on Foata normal form. 18/2402 useless extension candidates. Maximal degree in co-relation 10029. Up to 2241 conditions per place. [2024-06-27 20:43:21,577 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 71 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-27 20:43:21,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 95 transitions, 730 flow [2024-06-27 20:43:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:43:21,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:43:21,579 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 456 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:43:21,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 95 transitions, 730 flow [2024-06-27 20:43:21,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 685 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:21,587 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 493 flow [2024-06-27 20:43:21,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-06-27 20:43:21,588 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-27 20:43:21,588 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 493 flow [2024-06-27 20:43:21,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:21,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:21,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:21,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:43:21,589 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 20:43:21,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash -478435909, now seen corresponding path program 2 times [2024-06-27 20:43:21,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870545086] [2024-06-27 20:43:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:22,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:22,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870545086] [2024-06-27 20:43:22,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870545086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:22,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:22,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:22,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598677319] [2024-06-27 20:43:22,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:22,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:22,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:22,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:22,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 493 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:22,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:22,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:22,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:22,831 INFO L124 PetriNetUnfolderBase]: 1633/2493 cut-off events. [2024-06-27 20:43:22,832 INFO L125 PetriNetUnfolderBase]: For 17663/17676 co-relation queries the response was YES. [2024-06-27 20:43:22,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11114 conditions, 2493 events. 1633/2493 cut-off events. For 17663/17676 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11980 event pairs, 504 based on Foata normal form. 22/2513 useless extension candidates. Maximal degree in co-relation 11082. Up to 2263 conditions per place. [2024-06-27 20:43:22,847 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 74 selfloop transitions, 24 changer transitions 0/103 dead transitions. [2024-06-27 20:43:22,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 873 flow [2024-06-27 20:43:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:22,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:43:22,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:43:22,849 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 493 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:43:22,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 873 flow [2024-06-27 20:43:22,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 815 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:22,861 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 576 flow [2024-06-27 20:43:22,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=576, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-27 20:43:22,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-27 20:43:22,862 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 576 flow [2024-06-27 20:43:22,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:22,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:22,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:22,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:43:22,862 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 20:43:22,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:22,863 INFO L85 PathProgramCache]: Analyzing trace with hash -478441489, now seen corresponding path program 3 times [2024-06-27 20:43:22,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:22,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864730840] [2024-06-27 20:43:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:22,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:23,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:23,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864730840] [2024-06-27 20:43:23,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864730840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:23,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:23,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574278447] [2024-06-27 20:43:23,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:23,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:23,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:23,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:23,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:23,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:23,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:23,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:23,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:24,022 INFO L124 PetriNetUnfolderBase]: 1639/2510 cut-off events. [2024-06-27 20:43:24,022 INFO L125 PetriNetUnfolderBase]: For 20884/20891 co-relation queries the response was YES. [2024-06-27 20:43:24,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11869 conditions, 2510 events. 1639/2510 cut-off events. For 20884/20891 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12091 event pairs, 522 based on Foata normal form. 8/2515 useless extension candidates. Maximal degree in co-relation 11836. Up to 2303 conditions per place. [2024-06-27 20:43:24,036 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 73 selfloop transitions, 26 changer transitions 0/104 dead transitions. [2024-06-27 20:43:24,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 104 transitions, 880 flow [2024-06-27 20:43:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:43:24,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 20:43:24,037 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 576 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:43:24,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 104 transitions, 880 flow [2024-06-27 20:43:24,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 831 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:24,050 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 635 flow [2024-06-27 20:43:24,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=635, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-27 20:43:24,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-27 20:43:24,051 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 635 flow [2024-06-27 20:43:24,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:24,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:24,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:24,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:43:24,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:24,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1236545068, now seen corresponding path program 1 times [2024-06-27 20:43:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:24,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862537959] [2024-06-27 20:43:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:24,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:24,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:24,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862537959] [2024-06-27 20:43:24,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862537959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:24,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:24,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195106425] [2024-06-27 20:43:24,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:24,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:24,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:24,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:24,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 635 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 20:43:24,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:24,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:24,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:25,412 INFO L124 PetriNetUnfolderBase]: 1636/2493 cut-off events. [2024-06-27 20:43:25,412 INFO L125 PetriNetUnfolderBase]: For 24660/24660 co-relation queries the response was YES. [2024-06-27 20:43:25,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12277 conditions, 2493 events. 1636/2493 cut-off events. For 24660/24660 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11542 event pairs, 533 based on Foata normal form. 8/2498 useless extension candidates. Maximal degree in co-relation 12242. Up to 2363 conditions per place. [2024-06-27 20:43:25,427 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 81 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-06-27 20:43:25,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 931 flow [2024-06-27 20:43:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:43:25,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:43:25,429 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 635 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:43:25,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 931 flow [2024-06-27 20:43:25,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 847 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:25,442 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 636 flow [2024-06-27 20:43:25,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-06-27 20:43:25,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-27 20:43:25,443 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 636 flow [2024-06-27 20:43:25,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 20:43:25,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:25,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:25,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:43:25,444 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 20:43:25,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:25,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2064936622, now seen corresponding path program 1 times [2024-06-27 20:43:25,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:25,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035535226] [2024-06-27 20:43:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:25,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:26,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:26,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035535226] [2024-06-27 20:43:26,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035535226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:26,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:26,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:26,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638687936] [2024-06-27 20:43:26,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:26,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:26,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:26,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 636 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:26,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:26,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:26,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:26,917 INFO L124 PetriNetUnfolderBase]: 1640/2510 cut-off events. [2024-06-27 20:43:26,917 INFO L125 PetriNetUnfolderBase]: For 26532/26545 co-relation queries the response was YES. [2024-06-27 20:43:26,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12497 conditions, 2510 events. 1640/2510 cut-off events. For 26532/26545 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12123 event pairs, 375 based on Foata normal form. 14/2522 useless extension candidates. Maximal degree in co-relation 12461. Up to 2344 conditions per place. [2024-06-27 20:43:26,929 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 88 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2024-06-27 20:43:26,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 109 transitions, 938 flow [2024-06-27 20:43:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:43:26,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:43:26,931 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 636 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:43:26,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 109 transitions, 938 flow [2024-06-27 20:43:26,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 871 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:26,947 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 646 flow [2024-06-27 20:43:26,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=646, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-06-27 20:43:26,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-06-27 20:43:26,948 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 646 flow [2024-06-27 20:43:26,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:26,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:26,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:26,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:43:26,949 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 20:43:26,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2064876172, now seen corresponding path program 2 times [2024-06-27 20:43:26,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092131518] [2024-06-27 20:43:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092131518] [2024-06-27 20:43:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092131518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:27,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:27,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:27,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076116780] [2024-06-27 20:43:27,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:27,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:27,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:27,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:27,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 646 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:27,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:27,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:27,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:28,321 INFO L124 PetriNetUnfolderBase]: 1657/2537 cut-off events. [2024-06-27 20:43:28,321 INFO L125 PetriNetUnfolderBase]: For 30012/30025 co-relation queries the response was YES. [2024-06-27 20:43:28,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12851 conditions, 2537 events. 1657/2537 cut-off events. For 30012/30025 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12269 event pairs, 475 based on Foata normal form. 14/2549 useless extension candidates. Maximal degree in co-relation 12814. Up to 2374 conditions per place. [2024-06-27 20:43:28,335 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 86 selfloop transitions, 20 changer transitions 0/111 dead transitions. [2024-06-27 20:43:28,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 958 flow [2024-06-27 20:43:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:43:28,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 20:43:28,337 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 646 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:43:28,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 958 flow [2024-06-27 20:43:28,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 899 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:28,354 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 677 flow [2024-06-27 20:43:28,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=677, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-27 20:43:28,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-27 20:43:28,355 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 677 flow [2024-06-27 20:43:28,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:28,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:28,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:28,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:43:28,356 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 20:43:28,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1483531136, now seen corresponding path program 1 times [2024-06-27 20:43:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:28,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428778620] [2024-06-27 20:43:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:28,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:29,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:29,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428778620] [2024-06-27 20:43:29,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428778620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:29,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:29,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:29,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993761122] [2024-06-27 20:43:29,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:29,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:29,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:29,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:29,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:29,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 677 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:29,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:29,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:29,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:29,910 INFO L124 PetriNetUnfolderBase]: 1652/2530 cut-off events. [2024-06-27 20:43:29,910 INFO L125 PetriNetUnfolderBase]: For 33338/33351 co-relation queries the response was YES. [2024-06-27 20:43:29,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13077 conditions, 2530 events. 1652/2530 cut-off events. For 33338/33351 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12228 event pairs, 460 based on Foata normal form. 12/2540 useless extension candidates. Maximal degree in co-relation 13039. Up to 2358 conditions per place. [2024-06-27 20:43:29,922 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 85 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-27 20:43:29,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 114 transitions, 1013 flow [2024-06-27 20:43:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:43:29,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:43:29,924 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 677 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:43:29,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 114 transitions, 1013 flow [2024-06-27 20:43:29,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 943 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:29,941 INFO L231 Difference]: Finished difference. Result has 87 places, 90 transitions, 727 flow [2024-06-27 20:43:29,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=87, PETRI_TRANSITIONS=90} [2024-06-27 20:43:29,941 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-27 20:43:29,941 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 90 transitions, 727 flow [2024-06-27 20:43:29,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:29,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:29,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:29,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:43:29,942 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 20:43:29,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:29,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1946788492, now seen corresponding path program 3 times [2024-06-27 20:43:29,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:29,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88631958] [2024-06-27 20:43:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:29,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:30,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88631958] [2024-06-27 20:43:30,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88631958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:30,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:30,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:30,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632245672] [2024-06-27 20:43:30,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:30,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:30,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:30,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:30,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:30,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 727 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:30,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:30,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:30,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:31,365 INFO L124 PetriNetUnfolderBase]: 1644/2521 cut-off events. [2024-06-27 20:43:31,366 INFO L125 PetriNetUnfolderBase]: For 37180/37187 co-relation queries the response was YES. [2024-06-27 20:43:31,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13396 conditions, 2521 events. 1644/2521 cut-off events. For 37180/37187 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12162 event pairs, 467 based on Foata normal form. 8/2526 useless extension candidates. Maximal degree in co-relation 13357. Up to 2319 conditions per place. [2024-06-27 20:43:31,378 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 85 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-27 20:43:31,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 115 transitions, 1053 flow [2024-06-27 20:43:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:43:31,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:43:31,380 INFO L175 Difference]: Start difference. First operand has 87 places, 90 transitions, 727 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:43:31,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 115 transitions, 1053 flow [2024-06-27 20:43:31,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 115 transitions, 971 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:31,401 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 750 flow [2024-06-27 20:43:31,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=750, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2024-06-27 20:43:31,402 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-27 20:43:31,402 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 750 flow [2024-06-27 20:43:31,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:31,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:31,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:31,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:43:31,403 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:31,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:31,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2133031907, now seen corresponding path program 1 times [2024-06-27 20:43:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:31,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525507134] [2024-06-27 20:43:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:31,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:31,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525507134] [2024-06-27 20:43:31,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525507134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:31,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:31,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:31,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428606442] [2024-06-27 20:43:31,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:31,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:31,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:31,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:31,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:31,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:31,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 750 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:31,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:31,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:31,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:32,262 INFO L124 PetriNetUnfolderBase]: 1772/2654 cut-off events. [2024-06-27 20:43:32,263 INFO L125 PetriNetUnfolderBase]: For 42012/42025 co-relation queries the response was YES. [2024-06-27 20:43:32,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14123 conditions, 2654 events. 1772/2654 cut-off events. For 42012/42025 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12212 event pairs, 512 based on Foata normal form. 12/2664 useless extension candidates. Maximal degree in co-relation 14083. Up to 2613 conditions per place. [2024-06-27 20:43:32,276 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 88 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2024-06-27 20:43:32,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 1000 flow [2024-06-27 20:43:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:43:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:43:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-27 20:43:32,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:43:32,277 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 750 flow. Second operand 5 states and 80 transitions. [2024-06-27 20:43:32,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 1000 flow [2024-06-27 20:43:32,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 104 transitions, 913 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:32,301 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 731 flow [2024-06-27 20:43:32,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=731, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-27 20:43:32,301 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-27 20:43:32,302 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 731 flow [2024-06-27 20:43:32,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:32,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:32,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:32,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:43:32,302 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:32,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1855375941, now seen corresponding path program 2 times [2024-06-27 20:43:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:32,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348489974] [2024-06-27 20:43:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:32,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:32,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:32,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348489974] [2024-06-27 20:43:32,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348489974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:32,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:32,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:32,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510745950] [2024-06-27 20:43:32,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:32,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:32,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:32,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:32,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:32,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:32,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 731 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:32,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:32,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:32,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:33,269 INFO L124 PetriNetUnfolderBase]: 1766/2646 cut-off events. [2024-06-27 20:43:33,269 INFO L125 PetriNetUnfolderBase]: For 43898/43911 co-relation queries the response was YES. [2024-06-27 20:43:33,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14341 conditions, 2646 events. 1766/2646 cut-off events. For 43898/43911 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12157 event pairs, 512 based on Foata normal form. 12/2656 useless extension candidates. Maximal degree in co-relation 14300. Up to 2597 conditions per place. [2024-06-27 20:43:33,284 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 90 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2024-06-27 20:43:33,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 109 transitions, 1001 flow [2024-06-27 20:43:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-27 20:43:33,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:43:33,285 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 731 flow. Second operand 6 states and 92 transitions. [2024-06-27 20:43:33,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 109 transitions, 1001 flow [2024-06-27 20:43:33,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 109 transitions, 957 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:33,308 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 763 flow [2024-06-27 20:43:33,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2024-06-27 20:43:33,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-27 20:43:33,321 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 763 flow [2024-06-27 20:43:33,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:33,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:33,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:33,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:43:33,322 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:33,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1546350907, now seen corresponding path program 1 times [2024-06-27 20:43:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:33,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277384235] [2024-06-27 20:43:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:33,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:33,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:33,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277384235] [2024-06-27 20:43:33,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277384235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:33,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:33,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092603057] [2024-06-27 20:43:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:33,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:33,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:33,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:33,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:33,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:33,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 763 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:33,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:33,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:33,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:34,171 INFO L124 PetriNetUnfolderBase]: 1784/2669 cut-off events. [2024-06-27 20:43:34,171 INFO L125 PetriNetUnfolderBase]: For 43607/43607 co-relation queries the response was YES. [2024-06-27 20:43:34,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14532 conditions, 2669 events. 1784/2669 cut-off events. For 43607/43607 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12210 event pairs, 505 based on Foata normal form. 2/2670 useless extension candidates. Maximal degree in co-relation 14490. Up to 2630 conditions per place. [2024-06-27 20:43:34,185 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 106 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-27 20:43:34,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 124 transitions, 1164 flow [2024-06-27 20:43:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-27 20:43:34,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:43:34,188 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 763 flow. Second operand 6 states and 96 transitions. [2024-06-27 20:43:34,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 124 transitions, 1164 flow [2024-06-27 20:43:34,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 124 transitions, 1111 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:34,208 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 860 flow [2024-06-27 20:43:34,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2024-06-27 20:43:34,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-27 20:43:34,209 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 860 flow [2024-06-27 20:43:34,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:34,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:34,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:34,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:43:34,209 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:34,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:34,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1825876899, now seen corresponding path program 2 times [2024-06-27 20:43:34,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:34,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83860554] [2024-06-27 20:43:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:34,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:34,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:34,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83860554] [2024-06-27 20:43:34,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83860554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:34,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:34,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:34,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978598110] [2024-06-27 20:43:34,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:34,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:34,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:34,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 860 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:34,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:34,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:34,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:35,118 INFO L124 PetriNetUnfolderBase]: 1778/2661 cut-off events. [2024-06-27 20:43:35,119 INFO L125 PetriNetUnfolderBase]: For 47068/47068 co-relation queries the response was YES. [2024-06-27 20:43:35,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15083 conditions, 2661 events. 1778/2661 cut-off events. For 47068/47068 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12166 event pairs, 503 based on Foata normal form. 2/2662 useless extension candidates. Maximal degree in co-relation 15038. Up to 2640 conditions per place. [2024-06-27 20:43:35,130 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 106 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2024-06-27 20:43:35,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1127 flow [2024-06-27 20:43:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-27 20:43:35,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-27 20:43:35,132 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 860 flow. Second operand 6 states and 89 transitions. [2024-06-27 20:43:35,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1127 flow [2024-06-27 20:43:35,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 120 transitions, 1091 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 20:43:35,157 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 861 flow [2024-06-27 20:43:35,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=861, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2024-06-27 20:43:35,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-27 20:43:35,158 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 861 flow [2024-06-27 20:43:35,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:35,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:35,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:35,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:43:35,158 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 20:43:35,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1855361061, now seen corresponding path program 1 times [2024-06-27 20:43:35,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:35,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609838869] [2024-06-27 20:43:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:35,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:35,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:35,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609838869] [2024-06-27 20:43:35,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609838869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:35,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:35,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:35,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657869148] [2024-06-27 20:43:35,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:35,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:35,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:35,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:35,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 861 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:35,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:35,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:35,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:36,242 INFO L124 PetriNetUnfolderBase]: 1773/2654 cut-off events. [2024-06-27 20:43:36,242 INFO L125 PetriNetUnfolderBase]: For 50028/50028 co-relation queries the response was YES. [2024-06-27 20:43:36,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15182 conditions, 2654 events. 1773/2654 cut-off events. For 50028/50028 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12030 event pairs, 502 based on Foata normal form. 2/2655 useless extension candidates. Maximal degree in co-relation 15134. Up to 2630 conditions per place. [2024-06-27 20:43:36,256 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 107 selfloop transitions, 12 changer transitions 0/122 dead transitions. [2024-06-27 20:43:36,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 122 transitions, 1141 flow [2024-06-27 20:43:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-27 20:43:36,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-27 20:43:36,258 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 861 flow. Second operand 6 states and 89 transitions. [2024-06-27 20:43:36,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 122 transitions, 1141 flow [2024-06-27 20:43:36,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 122 transitions, 1117 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:36,278 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 888 flow [2024-06-27 20:43:36,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=888, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2024-06-27 20:43:36,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-27 20:43:36,278 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 888 flow [2024-06-27 20:43:36,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:36,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:36,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:36,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:43:36,279 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 20:43:36,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash 566497330, now seen corresponding path program 1 times [2024-06-27 20:43:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:36,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072140134] [2024-06-27 20:43:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:36,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:37,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:37,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072140134] [2024-06-27 20:43:37,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072140134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:37,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:37,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:37,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757440617] [2024-06-27 20:43:37,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:37,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:37,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:37,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 888 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:37,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:37,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:37,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:37,837 INFO L124 PetriNetUnfolderBase]: 1697/2600 cut-off events. [2024-06-27 20:43:37,837 INFO L125 PetriNetUnfolderBase]: For 55626/55639 co-relation queries the response was YES. [2024-06-27 20:43:37,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15622 conditions, 2600 events. 1697/2600 cut-off events. For 55626/55639 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12483 event pairs, 327 based on Foata normal form. 14/2612 useless extension candidates. Maximal degree in co-relation 15574. Up to 2411 conditions per place. [2024-06-27 20:43:37,856 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2024-06-27 20:43:37,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 143 transitions, 1282 flow [2024-06-27 20:43:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:43:37,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 20:43:37,858 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 888 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:43:37,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 143 transitions, 1282 flow [2024-06-27 20:43:37,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 143 transitions, 1247 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:37,895 INFO L231 Difference]: Finished difference. Result has 107 places, 114 transitions, 946 flow [2024-06-27 20:43:37,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=946, PETRI_PLACES=107, PETRI_TRANSITIONS=114} [2024-06-27 20:43:37,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-27 20:43:37,896 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 114 transitions, 946 flow [2024-06-27 20:43:37,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:37,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:37,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:37,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:43:37,897 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 20:43:37,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash 413352536, now seen corresponding path program 2 times [2024-06-27 20:43:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482855113] [2024-06-27 20:43:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:38,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482855113] [2024-06-27 20:43:38,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482855113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:38,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:38,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:38,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040237345] [2024-06-27 20:43:38,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:38,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:38,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:38,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:38,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:39,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:39,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 114 transitions, 946 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:39,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:39,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:39,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:39,613 INFO L124 PetriNetUnfolderBase]: 1689/2598 cut-off events. [2024-06-27 20:43:39,613 INFO L125 PetriNetUnfolderBase]: For 58943/58956 co-relation queries the response was YES. [2024-06-27 20:43:39,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15913 conditions, 2598 events. 1689/2598 cut-off events. For 58943/58956 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12626 event pairs, 428 based on Foata normal form. 14/2610 useless extension candidates. Maximal degree in co-relation 15864. Up to 2393 conditions per place. [2024-06-27 20:43:39,628 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 26 changer transitions 0/145 dead transitions. [2024-06-27 20:43:39,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1352 flow [2024-06-27 20:43:39,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:43:39,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:43:39,633 INFO L175 Difference]: Start difference. First operand has 107 places, 114 transitions, 946 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:43:39,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1352 flow [2024-06-27 20:43:39,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 145 transitions, 1277 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:39,667 INFO L231 Difference]: Finished difference. Result has 109 places, 116 transitions, 985 flow [2024-06-27 20:43:39,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=985, PETRI_PLACES=109, PETRI_TRANSITIONS=116} [2024-06-27 20:43:39,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-27 20:43:39,668 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 116 transitions, 985 flow [2024-06-27 20:43:39,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:39,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:39,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:39,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:43:39,669 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 20:43:39,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 413348816, now seen corresponding path program 3 times [2024-06-27 20:43:39,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:39,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123892922] [2024-06-27 20:43:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:39,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:40,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:40,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123892922] [2024-06-27 20:43:40,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123892922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:40,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:40,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:40,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886632135] [2024-06-27 20:43:40,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:40,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:40,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:40,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:40,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:40,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:40,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 116 transitions, 985 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:40,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:40,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:40,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:41,370 INFO L124 PetriNetUnfolderBase]: 1731/2664 cut-off events. [2024-06-27 20:43:41,370 INFO L125 PetriNetUnfolderBase]: For 68446/68459 co-relation queries the response was YES. [2024-06-27 20:43:41,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16801 conditions, 2664 events. 1731/2664 cut-off events. For 68446/68459 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12956 event pairs, 425 based on Foata normal form. 14/2676 useless extension candidates. Maximal degree in co-relation 16751. Up to 2468 conditions per place. [2024-06-27 20:43:41,387 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 22 changer transitions 0/147 dead transitions. [2024-06-27 20:43:41,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 147 transitions, 1397 flow [2024-06-27 20:43:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:43:41,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:43:41,388 INFO L175 Difference]: Start difference. First operand has 109 places, 116 transitions, 985 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:43:41,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 147 transitions, 1397 flow [2024-06-27 20:43:41,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 147 transitions, 1303 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:41,426 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 1000 flow [2024-06-27 20:43:41,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1000, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2024-06-27 20:43:41,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-27 20:43:41,427 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 1000 flow [2024-06-27 20:43:41,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:41,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:41,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:41,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:43:41,427 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 20:43:41,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:41,428 INFO L85 PathProgramCache]: Analyzing trace with hash 500194448, now seen corresponding path program 1 times [2024-06-27 20:43:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:41,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851654118] [2024-06-27 20:43:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:41,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:42,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:42,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851654118] [2024-06-27 20:43:42,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851654118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:42,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:42,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:42,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591417065] [2024-06-27 20:43:42,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:42,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:42,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:42,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:42,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:42,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:42,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 1000 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:42,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:42,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:42,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:42,929 INFO L124 PetriNetUnfolderBase]: 1897/2852 cut-off events. [2024-06-27 20:43:42,929 INFO L125 PetriNetUnfolderBase]: For 73267/73284 co-relation queries the response was YES. [2024-06-27 20:43:42,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17443 conditions, 2852 events. 1897/2852 cut-off events. For 73267/73284 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13291 event pairs, 463 based on Foata normal form. 18/2867 useless extension candidates. Maximal degree in co-relation 17392. Up to 2704 conditions per place. [2024-06-27 20:43:42,948 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 130 selfloop transitions, 25 changer transitions 0/158 dead transitions. [2024-06-27 20:43:42,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 158 transitions, 1482 flow [2024-06-27 20:43:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:43:42,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 20:43:42,949 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 1000 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:43:42,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 158 transitions, 1482 flow [2024-06-27 20:43:42,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 158 transitions, 1391 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:42,997 INFO L231 Difference]: Finished difference. Result has 115 places, 124 transitions, 1059 flow [2024-06-27 20:43:42,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1059, PETRI_PLACES=115, PETRI_TRANSITIONS=124} [2024-06-27 20:43:42,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-27 20:43:42,998 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 124 transitions, 1059 flow [2024-06-27 20:43:42,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:42,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:42,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:42,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:43:42,999 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:42,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:42,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1699807355, now seen corresponding path program 1 times [2024-06-27 20:43:42,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:42,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597070710] [2024-06-27 20:43:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:42,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:43,463 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 20:43:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597070710] [2024-06-27 20:43:43,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597070710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:43,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:43,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:43,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296271589] [2024-06-27 20:43:43,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:43,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:43,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:43,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 124 transitions, 1059 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:43,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:43,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:43,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:44,181 INFO L124 PetriNetUnfolderBase]: 1949/2922 cut-off events. [2024-06-27 20:43:44,181 INFO L125 PetriNetUnfolderBase]: For 79605/79618 co-relation queries the response was YES. [2024-06-27 20:43:44,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18387 conditions, 2922 events. 1949/2922 cut-off events. For 79605/79618 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13590 event pairs, 477 based on Foata normal form. 14/2934 useless extension candidates. Maximal degree in co-relation 18334. Up to 2811 conditions per place. [2024-06-27 20:43:44,200 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 124 selfloop transitions, 26 changer transitions 0/153 dead transitions. [2024-06-27 20:43:44,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 153 transitions, 1555 flow [2024-06-27 20:43:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:43:44,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 20:43:44,201 INFO L175 Difference]: Start difference. First operand has 115 places, 124 transitions, 1059 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:43:44,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 153 transitions, 1555 flow [2024-06-27 20:43:44,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 153 transitions, 1453 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:44,247 INFO L231 Difference]: Finished difference. Result has 117 places, 130 transitions, 1102 flow [2024-06-27 20:43:44,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1102, PETRI_PLACES=117, PETRI_TRANSITIONS=130} [2024-06-27 20:43:44,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-27 20:43:44,248 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 130 transitions, 1102 flow [2024-06-27 20:43:44,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:44,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:44,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:44,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:43:44,249 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 20:43:44,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash -215182388, now seen corresponding path program 2 times [2024-06-27 20:43:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588324807] [2024-06-27 20:43:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:44,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:45,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:45,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588324807] [2024-06-27 20:43:45,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588324807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:45,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:45,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:45,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057273279] [2024-06-27 20:43:45,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:45,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:45,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:45,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:45,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:45,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:45,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 130 transitions, 1102 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:45,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:45,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:45,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:45,853 INFO L124 PetriNetUnfolderBase]: 1993/2986 cut-off events. [2024-06-27 20:43:45,853 INFO L125 PetriNetUnfolderBase]: For 85032/85042 co-relation queries the response was YES. [2024-06-27 20:43:45,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18981 conditions, 2986 events. 1993/2986 cut-off events. For 85032/85042 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13960 event pairs, 470 based on Foata normal form. 12/2996 useless extension candidates. Maximal degree in co-relation 18927. Up to 2736 conditions per place. [2024-06-27 20:43:45,872 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 137 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-27 20:43:45,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 174 transitions, 1711 flow [2024-06-27 20:43:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:43:45,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 20:43:45,873 INFO L175 Difference]: Start difference. First operand has 117 places, 130 transitions, 1102 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:43:45,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 174 transitions, 1711 flow [2024-06-27 20:43:45,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 174 transitions, 1647 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:45,921 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1198 flow [2024-06-27 20:43:45,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1198, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2024-06-27 20:43:45,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-27 20:43:45,922 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1198 flow [2024-06-27 20:43:45,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:45,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:45,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:45,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:43:45,923 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 20:43:45,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:45,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1113071386, now seen corresponding path program 4 times [2024-06-27 20:43:45,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:45,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149883953] [2024-06-27 20:43:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:45,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:46,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:46,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149883953] [2024-06-27 20:43:46,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149883953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:46,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:46,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:46,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869675265] [2024-06-27 20:43:46,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:46,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:46,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:46,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:47,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:47,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1198 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:47,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:47,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:47,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:47,665 INFO L124 PetriNetUnfolderBase]: 1998/3068 cut-off events. [2024-06-27 20:43:47,666 INFO L125 PetriNetUnfolderBase]: For 94140/94145 co-relation queries the response was YES. [2024-06-27 20:43:47,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20261 conditions, 3068 events. 1998/3068 cut-off events. For 94140/94145 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15126 event pairs, 433 based on Foata normal form. 4/3064 useless extension candidates. Maximal degree in co-relation 20203. Up to 2807 conditions per place. [2024-06-27 20:43:47,687 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 159 selfloop transitions, 38 changer transitions 0/204 dead transitions. [2024-06-27 20:43:47,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 204 transitions, 1961 flow [2024-06-27 20:43:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:43:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:43:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 20:43:47,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-27 20:43:47,689 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1198 flow. Second operand 10 states and 172 transitions. [2024-06-27 20:43:47,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 204 transitions, 1961 flow [2024-06-27 20:43:47,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 204 transitions, 1883 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:47,747 INFO L231 Difference]: Finished difference. Result has 134 places, 165 transitions, 1525 flow [2024-06-27 20:43:47,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1525, PETRI_PLACES=134, PETRI_TRANSITIONS=165} [2024-06-27 20:43:47,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-27 20:43:47,748 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 165 transitions, 1525 flow [2024-06-27 20:43:47,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:47,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:47,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:47,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:43:47,748 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 20:43:47,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1702506184, now seen corresponding path program 5 times [2024-06-27 20:43:47,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:47,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549050057] [2024-06-27 20:43:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:47,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:48,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549050057] [2024-06-27 20:43:48,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549050057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:48,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:48,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:48,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166047311] [2024-06-27 20:43:48,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:48,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:48,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:48,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:48,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:48,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:48,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 165 transitions, 1525 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:48,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:48,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:48,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:49,510 INFO L124 PetriNetUnfolderBase]: 2006/3090 cut-off events. [2024-06-27 20:43:49,510 INFO L125 PetriNetUnfolderBase]: For 102098/102113 co-relation queries the response was YES. [2024-06-27 20:43:49,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20936 conditions, 3090 events. 2006/3090 cut-off events. For 102098/102113 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15329 event pairs, 412 based on Foata normal form. 8/3086 useless extension candidates. Maximal degree in co-relation 20873. Up to 2440 conditions per place. [2024-06-27 20:43:49,534 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 112 selfloop transitions, 81 changer transitions 0/200 dead transitions. [2024-06-27 20:43:49,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 200 transitions, 2247 flow [2024-06-27 20:43:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:43:49,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:43:49,535 INFO L175 Difference]: Start difference. First operand has 134 places, 165 transitions, 1525 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:43:49,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 200 transitions, 2247 flow [2024-06-27 20:43:49,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 200 transitions, 2141 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:49,611 INFO L231 Difference]: Finished difference. Result has 139 places, 170 transitions, 1784 flow [2024-06-27 20:43:49,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1784, PETRI_PLACES=139, PETRI_TRANSITIONS=170} [2024-06-27 20:43:49,612 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 20:43:49,612 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 170 transitions, 1784 flow [2024-06-27 20:43:49,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:49,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:49,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:49,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:43:49,613 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 20:43:49,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash 572712570, now seen corresponding path program 6 times [2024-06-27 20:43:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:49,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132420751] [2024-06-27 20:43:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:50,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132420751] [2024-06-27 20:43:50,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132420751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:50,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:50,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202378009] [2024-06-27 20:43:50,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:50,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:50,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:50,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:50,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 170 transitions, 1784 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:50,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:50,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:50,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:51,364 INFO L124 PetriNetUnfolderBase]: 2094/3238 cut-off events. [2024-06-27 20:43:51,364 INFO L125 PetriNetUnfolderBase]: For 122921/122946 co-relation queries the response was YES. [2024-06-27 20:43:51,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22806 conditions, 3238 events. 2094/3238 cut-off events. For 122921/122946 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16378 event pairs, 426 based on Foata normal form. 44/3272 useless extension candidates. Maximal degree in co-relation 22742. Up to 2761 conditions per place. [2024-06-27 20:43:51,385 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 159 selfloop transitions, 41 changer transitions 0/207 dead transitions. [2024-06-27 20:43:51,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 207 transitions, 2500 flow [2024-06-27 20:43:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:43:51,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:43:51,386 INFO L175 Difference]: Start difference. First operand has 139 places, 170 transitions, 1784 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:43:51,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 207 transitions, 2500 flow [2024-06-27 20:43:51,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 207 transitions, 2395 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:51,472 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 1843 flow [2024-06-27 20:43:51,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1843, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2024-06-27 20:43:51,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-27 20:43:51,473 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 1843 flow [2024-06-27 20:43:51,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:51,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:51,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:51,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:43:51,474 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 20:43:51,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash 433346766, now seen corresponding path program 3 times [2024-06-27 20:43:51,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:51,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802941636] [2024-06-27 20:43:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:51,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802941636] [2024-06-27 20:43:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802941636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:52,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661224870] [2024-06-27 20:43:52,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:52,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:52,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:52,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:52,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 1843 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:52,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:52,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:52,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:53,165 INFO L124 PetriNetUnfolderBase]: 2306/3475 cut-off events. [2024-06-27 20:43:53,165 INFO L125 PetriNetUnfolderBase]: For 120572/120592 co-relation queries the response was YES. [2024-06-27 20:43:53,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23926 conditions, 3475 events. 2306/3475 cut-off events. For 120572/120592 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16866 event pairs, 526 based on Foata normal form. 20/3492 useless extension candidates. Maximal degree in co-relation 23860. Up to 3274 conditions per place. [2024-06-27 20:43:53,194 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 170 selfloop transitions, 34 changer transitions 0/207 dead transitions. [2024-06-27 20:43:53,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 207 transitions, 2384 flow [2024-06-27 20:43:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:43:53,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-27 20:43:53,195 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 1843 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:43:53,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 207 transitions, 2384 flow [2024-06-27 20:43:53,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 207 transitions, 2265 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:53,334 INFO L231 Difference]: Finished difference. Result has 148 places, 174 transitions, 1833 flow [2024-06-27 20:43:53,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1833, PETRI_PLACES=148, PETRI_TRANSITIONS=174} [2024-06-27 20:43:53,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 20:43:53,334 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 174 transitions, 1833 flow [2024-06-27 20:43:53,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:53,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:53,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:53,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:43:53,335 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 20:43:53,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:53,335 INFO L85 PathProgramCache]: Analyzing trace with hash 427830564, now seen corresponding path program 7 times [2024-06-27 20:43:53,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:53,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722760121] [2024-06-27 20:43:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:53,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:54,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:54,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722760121] [2024-06-27 20:43:54,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722760121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:54,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:54,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:54,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601597360] [2024-06-27 20:43:54,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:54,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:54,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:54,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:54,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:54,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:54,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 174 transitions, 1833 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:54,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:54,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:54,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:54,960 INFO L124 PetriNetUnfolderBase]: 2076/3218 cut-off events. [2024-06-27 20:43:54,960 INFO L125 PetriNetUnfolderBase]: For 117942/117957 co-relation queries the response was YES. [2024-06-27 20:43:54,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22586 conditions, 3218 events. 2076/3218 cut-off events. For 117942/117957 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16276 event pairs, 429 based on Foata normal form. 8/3214 useless extension candidates. Maximal degree in co-relation 22518. Up to 2865 conditions per place. [2024-06-27 20:43:54,985 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 48 changer transitions 0/203 dead transitions. [2024-06-27 20:43:54,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 2379 flow [2024-06-27 20:43:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:43:54,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:43:54,986 INFO L175 Difference]: Start difference. First operand has 148 places, 174 transitions, 1833 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:43:54,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 2379 flow [2024-06-27 20:43:55,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 203 transitions, 2217 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-27 20:43:55,081 INFO L231 Difference]: Finished difference. Result has 145 places, 176 transitions, 1850 flow [2024-06-27 20:43:55,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1850, PETRI_PLACES=145, PETRI_TRANSITIONS=176} [2024-06-27 20:43:55,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-27 20:43:55,082 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 176 transitions, 1850 flow [2024-06-27 20:43:55,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 20:43:55,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:55,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:55,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:43:55,082 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 20:43:55,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash 427984386, now seen corresponding path program 4 times [2024-06-27 20:43:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:55,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51243110] [2024-06-27 20:43:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:55,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:56,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51243110] [2024-06-27 20:43:56,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51243110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:56,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:56,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:56,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300152151] [2024-06-27 20:43:56,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:56,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:56,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:56,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:56,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 176 transitions, 1850 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:56,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:56,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:56,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:56,940 INFO L124 PetriNetUnfolderBase]: 2296/3466 cut-off events. [2024-06-27 20:43:56,940 INFO L125 PetriNetUnfolderBase]: For 115991/116001 co-relation queries the response was YES. [2024-06-27 20:43:56,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23053 conditions, 3466 events. 2296/3466 cut-off events. For 115991/116001 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16751 event pairs, 500 based on Foata normal form. 8/3469 useless extension candidates. Maximal degree in co-relation 22986. Up to 3125 conditions per place. [2024-06-27 20:43:56,961 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 155 selfloop transitions, 58 changer transitions 0/216 dead transitions. [2024-06-27 20:43:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 216 transitions, 2491 flow [2024-06-27 20:43:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:43:56,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 20:43:56,962 INFO L175 Difference]: Start difference. First operand has 145 places, 176 transitions, 1850 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:43:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 216 transitions, 2491 flow [2024-06-27 20:43:57,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 216 transitions, 2334 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:57,050 INFO L231 Difference]: Finished difference. Result has 149 places, 184 transitions, 1946 flow [2024-06-27 20:43:57,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1946, PETRI_PLACES=149, PETRI_TRANSITIONS=184} [2024-06-27 20:43:57,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-27 20:43:57,051 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 184 transitions, 1946 flow [2024-06-27 20:43:57,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:57,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:57,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:43:57,052 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 20:43:57,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1810528723, now seen corresponding path program 2 times [2024-06-27 20:43:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:57,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735593497] [2024-06-27 20:43:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:57,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:57,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735593497] [2024-06-27 20:43:57,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735593497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:57,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:57,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:57,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188315874] [2024-06-27 20:43:57,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:57,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:57,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:57,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:57,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:57,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:57,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 184 transitions, 1946 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:57,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:57,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:57,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:58,231 INFO L124 PetriNetUnfolderBase]: 2284/3450 cut-off events. [2024-06-27 20:43:58,231 INFO L125 PetriNetUnfolderBase]: For 118057/118067 co-relation queries the response was YES. [2024-06-27 20:43:58,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23046 conditions, 3450 events. 2284/3450 cut-off events. For 118057/118067 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16696 event pairs, 532 based on Foata normal form. 8/3453 useless extension candidates. Maximal degree in co-relation 22977. Up to 3306 conditions per place. [2024-06-27 20:43:58,256 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 162 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-27 20:43:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 197 transitions, 2376 flow [2024-06-27 20:43:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 20:43:58,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-27 20:43:58,257 INFO L175 Difference]: Start difference. First operand has 149 places, 184 transitions, 1946 flow. Second operand 6 states and 97 transitions. [2024-06-27 20:43:58,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 197 transitions, 2376 flow [2024-06-27 20:43:58,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 197 transitions, 2177 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:58,351 INFO L231 Difference]: Finished difference. Result has 149 places, 184 transitions, 1817 flow [2024-06-27 20:43:58,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1817, PETRI_PLACES=149, PETRI_TRANSITIONS=184} [2024-06-27 20:43:58,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-27 20:43:58,351 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 184 transitions, 1817 flow [2024-06-27 20:43:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:58,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:58,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:58,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:43:58,352 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:58,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1682078711, now seen corresponding path program 3 times [2024-06-27 20:43:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793432569] [2024-06-27 20:43:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:58,864 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 20:43:58,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:58,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793432569] [2024-06-27 20:43:58,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793432569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:58,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:58,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088089582] [2024-06-27 20:43:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:58,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:58,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:43:58,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 184 transitions, 1817 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:58,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:58,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:43:58,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:59,551 INFO L124 PetriNetUnfolderBase]: 2272/3434 cut-off events. [2024-06-27 20:43:59,551 INFO L125 PetriNetUnfolderBase]: For 119917/119927 co-relation queries the response was YES. [2024-06-27 20:43:59,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22614 conditions, 3434 events. 2272/3434 cut-off events. For 119917/119927 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16577 event pairs, 528 based on Foata normal form. 8/3437 useless extension candidates. Maximal degree in co-relation 22544. Up to 3266 conditions per place. [2024-06-27 20:43:59,619 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 162 selfloop transitions, 37 changer transitions 0/202 dead transitions. [2024-06-27 20:43:59,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 2309 flow [2024-06-27 20:43:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 20:43:59,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-27 20:43:59,621 INFO L175 Difference]: Start difference. First operand has 149 places, 184 transitions, 1817 flow. Second operand 7 states and 109 transitions. [2024-06-27 20:43:59,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 2309 flow [2024-06-27 20:43:59,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 202 transitions, 2245 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:59,731 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 1885 flow [2024-06-27 20:43:59,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1885, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-27 20:43:59,732 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-27 20:43:59,732 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 1885 flow [2024-06-27 20:43:59,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:59,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:59,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:59,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:43:59,732 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:59,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash 692088929, now seen corresponding path program 1 times [2024-06-27 20:43:59,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:59,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367049160] [2024-06-27 20:43:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:00,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367049160] [2024-06-27 20:44:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367049160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:00,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:00,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732719005] [2024-06-27 20:44:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:00,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:00,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 1885 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:00,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:00,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:00,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:00,935 INFO L124 PetriNetUnfolderBase]: 2290/3456 cut-off events. [2024-06-27 20:44:00,936 INFO L125 PetriNetUnfolderBase]: For 124652/124652 co-relation queries the response was YES. [2024-06-27 20:44:00,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23230 conditions, 3456 events. 2290/3456 cut-off events. For 124652/124652 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16740 event pairs, 555 based on Foata normal form. 2/3457 useless extension candidates. Maximal degree in co-relation 23159. Up to 3383 conditions per place. [2024-06-27 20:44:00,958 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 189 selfloop transitions, 23 changer transitions 0/215 dead transitions. [2024-06-27 20:44:00,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 215 transitions, 2515 flow [2024-06-27 20:44:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:44:00,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:44:00,959 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 1885 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:44:00,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 215 transitions, 2515 flow [2024-06-27 20:44:01,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 215 transitions, 2405 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:01,078 INFO L231 Difference]: Finished difference. Result has 154 places, 195 transitions, 1919 flow [2024-06-27 20:44:01,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1919, PETRI_PLACES=154, PETRI_TRANSITIONS=195} [2024-06-27 20:44:01,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-27 20:44:01,078 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 195 transitions, 1919 flow [2024-06-27 20:44:01,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:01,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:01,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:01,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:44:01,079 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:01,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash 692238659, now seen corresponding path program 2 times [2024-06-27 20:44:01,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:01,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539483344] [2024-06-27 20:44:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:01,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:01,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:01,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539483344] [2024-06-27 20:44:01,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539483344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:01,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:01,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311494488] [2024-06-27 20:44:01,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:01,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:01,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:01,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:01,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:01,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 195 transitions, 1919 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:01,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:01,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:01,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:02,265 INFO L124 PetriNetUnfolderBase]: 2300/3470 cut-off events. [2024-06-27 20:44:02,265 INFO L125 PetriNetUnfolderBase]: For 131042/131042 co-relation queries the response was YES. [2024-06-27 20:44:02,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23718 conditions, 3470 events. 2300/3470 cut-off events. For 131042/131042 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16806 event pairs, 556 based on Foata normal form. 2/3471 useless extension candidates. Maximal degree in co-relation 23645. Up to 3419 conditions per place. [2024-06-27 20:44:02,289 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 192 selfloop transitions, 19 changer transitions 0/214 dead transitions. [2024-06-27 20:44:02,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 214 transitions, 2428 flow [2024-06-27 20:44:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 20:44:02,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821428571428571 [2024-06-27 20:44:02,290 INFO L175 Difference]: Start difference. First operand has 154 places, 195 transitions, 1919 flow. Second operand 7 states and 107 transitions. [2024-06-27 20:44:02,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 214 transitions, 2428 flow [2024-06-27 20:44:02,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 214 transitions, 2364 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:02,393 INFO L231 Difference]: Finished difference. Result has 158 places, 198 transitions, 1942 flow [2024-06-27 20:44:02,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1942, PETRI_PLACES=158, PETRI_TRANSITIONS=198} [2024-06-27 20:44:02,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-27 20:44:02,393 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 198 transitions, 1942 flow [2024-06-27 20:44:02,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:02,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:02,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:02,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:44:02,394 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:02,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash -767600566, now seen corresponding path program 1 times [2024-06-27 20:44:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:02,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134352892] [2024-06-27 20:44:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:02,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:02,960 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 20:44:02,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134352892] [2024-06-27 20:44:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134352892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971434827] [2024-06-27 20:44:02,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:02,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:02,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:02,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 198 transitions, 1942 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:02,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:02,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:02,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:03,603 INFO L124 PetriNetUnfolderBase]: 2297/3466 cut-off events. [2024-06-27 20:44:03,603 INFO L125 PetriNetUnfolderBase]: For 137152/137152 co-relation queries the response was YES. [2024-06-27 20:44:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23817 conditions, 3466 events. 2297/3466 cut-off events. For 137152/137152 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16798 event pairs, 560 based on Foata normal form. 1/3466 useless extension candidates. Maximal degree in co-relation 23742. Up to 3432 conditions per place. [2024-06-27 20:44:03,628 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 192 selfloop transitions, 16 changer transitions 0/211 dead transitions. [2024-06-27 20:44:03,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 211 transitions, 2428 flow [2024-06-27 20:44:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-27 20:44:03,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:44:03,629 INFO L175 Difference]: Start difference. First operand has 158 places, 198 transitions, 1942 flow. Second operand 6 states and 90 transitions. [2024-06-27 20:44:03,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 211 transitions, 2428 flow [2024-06-27 20:44:03,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 211 transitions, 2384 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:03,785 INFO L231 Difference]: Finished difference. Result has 159 places, 201 transitions, 1986 flow [2024-06-27 20:44:03,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1986, PETRI_PLACES=159, PETRI_TRANSITIONS=201} [2024-06-27 20:44:03,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 20:44:03,785 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 201 transitions, 1986 flow [2024-06-27 20:44:03,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:03,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:03,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:03,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:44:03,786 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 20:44:03,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1681894013, now seen corresponding path program 3 times [2024-06-27 20:44:03,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:03,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167932112] [2024-06-27 20:44:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:03,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:04,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:04,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167932112] [2024-06-27 20:44:04,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167932112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:04,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:04,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:04,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295923199] [2024-06-27 20:44:04,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:04,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:04,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:04,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:04,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 201 transitions, 1986 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:04,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:04,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:04,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:04,991 INFO L124 PetriNetUnfolderBase]: 2291/3458 cut-off events. [2024-06-27 20:44:04,991 INFO L125 PetriNetUnfolderBase]: For 139518/139518 co-relation queries the response was YES. [2024-06-27 20:44:05,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24117 conditions, 3458 events. 2291/3458 cut-off events. For 139518/139518 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16691 event pairs, 555 based on Foata normal form. 2/3459 useless extension candidates. Maximal degree in co-relation 24041. Up to 3422 conditions per place. [2024-06-27 20:44:05,021 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 14 changer transitions 0/214 dead transitions. [2024-06-27 20:44:05,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 214 transitions, 2453 flow [2024-06-27 20:44:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-27 20:44:05,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3607142857142857 [2024-06-27 20:44:05,022 INFO L175 Difference]: Start difference. First operand has 159 places, 201 transitions, 1986 flow. Second operand 7 states and 101 transitions. [2024-06-27 20:44:05,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 214 transitions, 2453 flow [2024-06-27 20:44:05,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 214 transitions, 2395 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:05,170 INFO L231 Difference]: Finished difference. Result has 162 places, 202 transitions, 1973 flow [2024-06-27 20:44:05,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1973, PETRI_PLACES=162, PETRI_TRANSITIONS=202} [2024-06-27 20:44:05,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-27 20:44:05,171 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 202 transitions, 1973 flow [2024-06-27 20:44:05,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:05,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:05,171 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 20:44:05,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:44:05,171 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:05,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:05,172 INFO L85 PathProgramCache]: Analyzing trace with hash 439761391, now seen corresponding path program 1 times [2024-06-27 20:44:05,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:05,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387824091] [2024-06-27 20:44:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:05,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:06,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:06,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387824091] [2024-06-27 20:44:06,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387824091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:06,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:06,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:44:06,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680125202] [2024-06-27 20:44:06,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:06,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:44:06,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:44:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:44:06,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:06,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 202 transitions, 1973 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:06,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:06,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:06,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:07,401 INFO L124 PetriNetUnfolderBase]: 2286/3448 cut-off events. [2024-06-27 20:44:07,402 INFO L125 PetriNetUnfolderBase]: For 144003/144023 co-relation queries the response was YES. [2024-06-27 20:44:07,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24126 conditions, 3448 events. 2286/3448 cut-off events. For 144003/144023 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16644 event pairs, 477 based on Foata normal form. 18/3463 useless extension candidates. Maximal degree in co-relation 24049. Up to 3195 conditions per place. [2024-06-27 20:44:07,428 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 188 selfloop transitions, 49 changer transitions 0/240 dead transitions. [2024-06-27 20:44:07,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 240 transitions, 2591 flow [2024-06-27 20:44:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:44:07,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 20:44:07,430 INFO L175 Difference]: Start difference. First operand has 162 places, 202 transitions, 1973 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:44:07,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 240 transitions, 2591 flow [2024-06-27 20:44:07,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 240 transitions, 2531 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:07,598 INFO L231 Difference]: Finished difference. Result has 167 places, 205 transitions, 2065 flow [2024-06-27 20:44:07,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2065, PETRI_PLACES=167, PETRI_TRANSITIONS=205} [2024-06-27 20:44:07,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-27 20:44:07,598 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 205 transitions, 2065 flow [2024-06-27 20:44:07,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:07,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:07,599 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 20:44:07,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:44:07,599 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:07,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1478845445, now seen corresponding path program 1 times [2024-06-27 20:44:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:07,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603123146] [2024-06-27 20:44:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:07,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:08,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:08,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603123146] [2024-06-27 20:44:08,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603123146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:08,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:08,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:44:08,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237925412] [2024-06-27 20:44:08,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:08,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:44:08,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:44:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:44:08,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:08,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 205 transitions, 2065 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:08,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:08,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:08,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:09,570 INFO L124 PetriNetUnfolderBase]: 2479/3750 cut-off events. [2024-06-27 20:44:09,570 INFO L125 PetriNetUnfolderBase]: For 167581/167589 co-relation queries the response was YES. [2024-06-27 20:44:09,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26477 conditions, 3750 events. 2479/3750 cut-off events. For 167581/167589 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 18465 event pairs, 503 based on Foata normal form. 28/3774 useless extension candidates. Maximal degree in co-relation 26398. Up to 3395 conditions per place. [2024-06-27 20:44:09,598 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 227 selfloop transitions, 48 changer transitions 0/278 dead transitions. [2024-06-27 20:44:09,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 278 transitions, 3142 flow [2024-06-27 20:44:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:44:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:44:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-27 20:44:09,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:44:09,599 INFO L175 Difference]: Start difference. First operand has 167 places, 205 transitions, 2065 flow. Second operand 12 states and 190 transitions. [2024-06-27 20:44:09,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 278 transitions, 3142 flow [2024-06-27 20:44:09,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 278 transitions, 2911 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:09,756 INFO L231 Difference]: Finished difference. Result has 180 places, 231 transitions, 2376 flow [2024-06-27 20:44:09,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2376, PETRI_PLACES=180, PETRI_TRANSITIONS=231} [2024-06-27 20:44:09,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-27 20:44:09,757 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 231 transitions, 2376 flow [2024-06-27 20:44:09,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:09,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:09,757 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 20:44:09,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:44:09,757 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 20:44:09,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash 89931331, now seen corresponding path program 2 times [2024-06-27 20:44:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:09,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671987016] [2024-06-27 20:44:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:09,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:10,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:10,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671987016] [2024-06-27 20:44:10,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671987016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:10,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:10,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:44:10,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635084860] [2024-06-27 20:44:10,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:10,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:44:10,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:44:10,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:44:10,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:10,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 231 transitions, 2376 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:10,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:10,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:10,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:11,731 INFO L124 PetriNetUnfolderBase]: 2794/4235 cut-off events. [2024-06-27 20:44:11,731 INFO L125 PetriNetUnfolderBase]: For 187378/187394 co-relation queries the response was YES. [2024-06-27 20:44:11,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29970 conditions, 4235 events. 2794/4235 cut-off events. For 187378/187394 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 21524 event pairs, 550 based on Foata normal form. 36/4270 useless extension candidates. Maximal degree in co-relation 29882. Up to 3746 conditions per place. [2024-06-27 20:44:11,767 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 248 selfloop transitions, 69 changer transitions 0/320 dead transitions. [2024-06-27 20:44:11,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 320 transitions, 3717 flow [2024-06-27 20:44:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:44:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:44:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-27 20:44:11,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:44:11,768 INFO L175 Difference]: Start difference. First operand has 180 places, 231 transitions, 2376 flow. Second operand 12 states and 195 transitions. [2024-06-27 20:44:11,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 320 transitions, 3717 flow [2024-06-27 20:44:11,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 320 transitions, 3615 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 20:44:11,964 INFO L231 Difference]: Finished difference. Result has 195 places, 268 transitions, 3054 flow [2024-06-27 20:44:11,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3054, PETRI_PLACES=195, PETRI_TRANSITIONS=268} [2024-06-27 20:44:11,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-27 20:44:11,964 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 268 transitions, 3054 flow [2024-06-27 20:44:11,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:11,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:11,965 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 20:44:11,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:44:11,965 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:11,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1565825241, now seen corresponding path program 3 times [2024-06-27 20:44:11,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:11,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666473089] [2024-06-27 20:44:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:11,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:12,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:12,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666473089] [2024-06-27 20:44:12,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666473089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:12,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:12,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:44:12,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258187630] [2024-06-27 20:44:12,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:12,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:44:12,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:12,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:44:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:44:13,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:13,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 268 transitions, 3054 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:13,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:13,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:13,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:14,171 INFO L124 PetriNetUnfolderBase]: 2995/4580 cut-off events. [2024-06-27 20:44:14,171 INFO L125 PetriNetUnfolderBase]: For 201176/201198 co-relation queries the response was YES. [2024-06-27 20:44:14,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32465 conditions, 4580 events. 2995/4580 cut-off events. For 201176/201198 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24036 event pairs, 574 based on Foata normal form. 40/4617 useless extension candidates. Maximal degree in co-relation 32370. Up to 3635 conditions per place. [2024-06-27 20:44:14,214 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 216 selfloop transitions, 96 changer transitions 0/315 dead transitions. [2024-06-27 20:44:14,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 315 transitions, 4010 flow [2024-06-27 20:44:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:44:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:44:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 20:44:14,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-27 20:44:14,217 INFO L175 Difference]: Start difference. First operand has 195 places, 268 transitions, 3054 flow. Second operand 10 states and 164 transitions. [2024-06-27 20:44:14,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 315 transitions, 4010 flow [2024-06-27 20:44:14,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 315 transitions, 3861 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:14,445 INFO L231 Difference]: Finished difference. Result has 200 places, 274 transitions, 3300 flow [2024-06-27 20:44:14,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3300, PETRI_PLACES=200, PETRI_TRANSITIONS=274} [2024-06-27 20:44:14,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-27 20:44:14,446 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 274 transitions, 3300 flow [2024-06-27 20:44:14,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:14,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:14,446 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 20:44:14,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:44:14,446 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:14,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1150905092, now seen corresponding path program 1 times [2024-06-27 20:44:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:14,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15950089] [2024-06-27 20:44:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:14,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:14,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:14,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15950089] [2024-06-27 20:44:14,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15950089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:14,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:14,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:14,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213950532] [2024-06-27 20:44:14,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:14,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:14,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:14,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:14,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 274 transitions, 3300 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:14,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:14,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:14,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:15,849 INFO L124 PetriNetUnfolderBase]: 3032/4625 cut-off events. [2024-06-27 20:44:15,849 INFO L125 PetriNetUnfolderBase]: For 193516/193534 co-relation queries the response was YES. [2024-06-27 20:44:15,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33172 conditions, 4625 events. 3032/4625 cut-off events. For 193516/193534 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24305 event pairs, 763 based on Foata normal form. 18/4641 useless extension candidates. Maximal degree in co-relation 33077. Up to 4514 conditions per place. [2024-06-27 20:44:15,888 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 261 selfloop transitions, 39 changer transitions 0/303 dead transitions. [2024-06-27 20:44:15,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 303 transitions, 4205 flow [2024-06-27 20:44:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 20:44:15,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:44:15,889 INFO L175 Difference]: Start difference. First operand has 200 places, 274 transitions, 3300 flow. Second operand 7 states and 110 transitions. [2024-06-27 20:44:15,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 303 transitions, 4205 flow [2024-06-27 20:44:16,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 303 transitions, 4006 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:16,184 INFO L231 Difference]: Finished difference. Result has 201 places, 286 transitions, 3392 flow [2024-06-27 20:44:16,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3392, PETRI_PLACES=201, PETRI_TRANSITIONS=286} [2024-06-27 20:44:16,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-27 20:44:16,185 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 286 transitions, 3392 flow [2024-06-27 20:44:16,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:16,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:16,185 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 20:44:16,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:44:16,185 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:16,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash -257658692, now seen corresponding path program 2 times [2024-06-27 20:44:16,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:16,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311392764] [2024-06-27 20:44:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:16,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311392764] [2024-06-27 20:44:16,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311392764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:16,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:16,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:16,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495907464] [2024-06-27 20:44:16,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:16,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:16,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:16,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:16,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 286 transitions, 3392 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:16,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:16,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:16,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:17,513 INFO L124 PetriNetUnfolderBase]: 3026/4617 cut-off events. [2024-06-27 20:44:17,513 INFO L125 PetriNetUnfolderBase]: For 195601/195619 co-relation queries the response was YES. [2024-06-27 20:44:17,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33057 conditions, 4617 events. 3026/4617 cut-off events. For 195601/195619 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24257 event pairs, 758 based on Foata normal form. 18/4633 useless extension candidates. Maximal degree in co-relation 32959. Up to 4553 conditions per place. [2024-06-27 20:44:17,560 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 270 selfloop transitions, 24 changer transitions 0/297 dead transitions. [2024-06-27 20:44:17,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 297 transitions, 4028 flow [2024-06-27 20:44:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-27 20:44:17,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:44:17,561 INFO L175 Difference]: Start difference. First operand has 201 places, 286 transitions, 3392 flow. Second operand 6 states and 92 transitions. [2024-06-27 20:44:17,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 297 transitions, 4028 flow [2024-06-27 20:44:17,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 297 transitions, 3939 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:17,808 INFO L231 Difference]: Finished difference. Result has 204 places, 286 transitions, 3361 flow [2024-06-27 20:44:17,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3361, PETRI_PLACES=204, PETRI_TRANSITIONS=286} [2024-06-27 20:44:17,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-27 20:44:17,809 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 286 transitions, 3361 flow [2024-06-27 20:44:17,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:17,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:17,809 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 20:44:17,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:44:17,809 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 20:44:17,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1746791475, now seen corresponding path program 4 times [2024-06-27 20:44:17,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:17,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425876352] [2024-06-27 20:44:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:17,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425876352] [2024-06-27 20:44:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425876352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:18,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:18,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:44:18,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906632005] [2024-06-27 20:44:18,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:18,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:44:18,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:44:18,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:44:19,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:19,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 286 transitions, 3361 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:19,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:19,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:19,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:20,010 INFO L124 PetriNetUnfolderBase]: 3101/4749 cut-off events. [2024-06-27 20:44:20,011 INFO L125 PetriNetUnfolderBase]: For 214303/214307 co-relation queries the response was YES. [2024-06-27 20:44:20,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33989 conditions, 4749 events. 3101/4749 cut-off events. For 214303/214307 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 25166 event pairs, 557 based on Foata normal form. 24/4768 useless extension candidates. Maximal degree in co-relation 33890. Up to 4202 conditions per place. [2024-06-27 20:44:20,061 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 241 selfloop transitions, 83 changer transitions 0/327 dead transitions. [2024-06-27 20:44:20,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 327 transitions, 4227 flow [2024-06-27 20:44:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:44:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:44:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 20:44:20,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-27 20:44:20,063 INFO L175 Difference]: Start difference. First operand has 204 places, 286 transitions, 3361 flow. Second operand 10 states and 164 transitions. [2024-06-27 20:44:20,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 327 transitions, 4227 flow [2024-06-27 20:44:20,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 327 transitions, 4181 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:20,348 INFO L231 Difference]: Finished difference. Result has 210 places, 287 transitions, 3544 flow [2024-06-27 20:44:20,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3544, PETRI_PLACES=210, PETRI_TRANSITIONS=287} [2024-06-27 20:44:20,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-27 20:44:20,348 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 287 transitions, 3544 flow [2024-06-27 20:44:20,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:20,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:20,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:20,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:44:20,349 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 20:44:20,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:20,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1919520375, now seen corresponding path program 5 times [2024-06-27 20:44:20,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:20,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72934662] [2024-06-27 20:44:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:21,109 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 20:44:21,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:21,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72934662] [2024-06-27 20:44:21,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72934662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:21,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:44:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149582102] [2024-06-27 20:44:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:44:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:44:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:44:21,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:21,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 287 transitions, 3544 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:21,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:21,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:21,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:22,178 INFO L124 PetriNetUnfolderBase]: 3262/5009 cut-off events. [2024-06-27 20:44:22,178 INFO L125 PetriNetUnfolderBase]: For 243894/243912 co-relation queries the response was YES. [2024-06-27 20:44:22,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37195 conditions, 5009 events. 3262/5009 cut-off events. For 243894/243912 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 27064 event pairs, 769 based on Foata normal form. 32/5039 useless extension candidates. Maximal degree in co-relation 37095. Up to 4254 conditions per place. [2024-06-27 20:44:22,230 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 280 selfloop transitions, 51 changer transitions 0/334 dead transitions. [2024-06-27 20:44:22,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 334 transitions, 4714 flow [2024-06-27 20:44:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:44:22,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 20:44:22,232 INFO L175 Difference]: Start difference. First operand has 210 places, 287 transitions, 3544 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:44:22,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 334 transitions, 4714 flow [2024-06-27 20:44:22,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 334 transitions, 4515 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:22,542 INFO L231 Difference]: Finished difference. Result has 212 places, 290 transitions, 3602 flow [2024-06-27 20:44:22,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3602, PETRI_PLACES=212, PETRI_TRANSITIONS=290} [2024-06-27 20:44:22,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-27 20:44:22,543 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 290 transitions, 3602 flow [2024-06-27 20:44:22,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:22,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:22,543 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 20:44:22,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:44:22,543 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 20:44:22,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:22,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1913025255, now seen corresponding path program 6 times [2024-06-27 20:44:22,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:22,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150018393] [2024-06-27 20:44:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150018393] [2024-06-27 20:44:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150018393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:44:23,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534865443] [2024-06-27 20:44:23,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:44:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:44:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:44:23,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:23,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 290 transitions, 3602 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:23,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:23,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:23,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:24,754 INFO L124 PetriNetUnfolderBase]: 3354/5161 cut-off events. [2024-06-27 20:44:24,755 INFO L125 PetriNetUnfolderBase]: For 258811/258829 co-relation queries the response was YES. [2024-06-27 20:44:24,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38223 conditions, 5161 events. 3354/5161 cut-off events. For 258811/258829 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28211 event pairs, 832 based on Foata normal form. 36/5195 useless extension candidates. Maximal degree in co-relation 38121. Up to 4740 conditions per place. [2024-06-27 20:44:24,811 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 280 selfloop transitions, 52 changer transitions 0/335 dead transitions. [2024-06-27 20:44:24,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 335 transitions, 4546 flow [2024-06-27 20:44:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:44:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:44:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:44:24,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-27 20:44:24,812 INFO L175 Difference]: Start difference. First operand has 212 places, 290 transitions, 3602 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:44:24,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 335 transitions, 4546 flow [2024-06-27 20:44:25,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 335 transitions, 4444 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:25,217 INFO L231 Difference]: Finished difference. Result has 217 places, 293 transitions, 3710 flow [2024-06-27 20:44:25,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3710, PETRI_PLACES=217, PETRI_TRANSITIONS=293} [2024-06-27 20:44:25,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-27 20:44:25,217 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 293 transitions, 3710 flow [2024-06-27 20:44:25,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:25,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:25,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:25,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:44:25,218 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 20:44:25,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1919281365, now seen corresponding path program 7 times [2024-06-27 20:44:25,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:25,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500393205] [2024-06-27 20:44:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:25,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:26,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:26,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500393205] [2024-06-27 20:44:26,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500393205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:26,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:26,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:44:26,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352110722] [2024-06-27 20:44:26,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:26,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:44:26,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:44:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:44:26,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:26,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 293 transitions, 3710 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:26,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:26,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:26,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:27,537 INFO L124 PetriNetUnfolderBase]: 3379/5208 cut-off events. [2024-06-27 20:44:27,537 INFO L125 PetriNetUnfolderBase]: For 261114/261132 co-relation queries the response was YES. [2024-06-27 20:44:27,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38389 conditions, 5208 events. 3379/5208 cut-off events. For 261114/261132 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 28566 event pairs, 829 based on Foata normal form. 36/5242 useless extension candidates. Maximal degree in co-relation 38285. Up to 4667 conditions per place. [2024-06-27 20:44:27,591 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 282 selfloop transitions, 52 changer transitions 0/337 dead transitions. [2024-06-27 20:44:27,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 337 transitions, 4637 flow [2024-06-27 20:44:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:44:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:44:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:44:27,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-27 20:44:27,593 INFO L175 Difference]: Start difference. First operand has 217 places, 293 transitions, 3710 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:44:27,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 337 transitions, 4637 flow [2024-06-27 20:44:27,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 337 transitions, 4505 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:27,975 INFO L231 Difference]: Finished difference. Result has 219 places, 295 transitions, 3767 flow [2024-06-27 20:44:27,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3767, PETRI_PLACES=219, PETRI_TRANSITIONS=295} [2024-06-27 20:44:27,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-27 20:44:27,976 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 295 transitions, 3767 flow [2024-06-27 20:44:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:27,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:27,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:44:27,976 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 20:44:27,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1144229924, now seen corresponding path program 1 times [2024-06-27 20:44:27,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:27,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357255652] [2024-06-27 20:44:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:27,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357255652] [2024-06-27 20:44:28,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357255652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:28,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:28,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111815107] [2024-06-27 20:44:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:28,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:28,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:28,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 295 transitions, 3767 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:28,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:28,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:28,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:29,784 INFO L124 PetriNetUnfolderBase]: 3387/5220 cut-off events. [2024-06-27 20:44:29,785 INFO L125 PetriNetUnfolderBase]: For 249672/249690 co-relation queries the response was YES. [2024-06-27 20:44:29,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38438 conditions, 5220 events. 3387/5220 cut-off events. For 249672/249690 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 28646 event pairs, 873 based on Foata normal form. 18/5236 useless extension candidates. Maximal degree in co-relation 38333. Up to 5150 conditions per place. [2024-06-27 20:44:29,839 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 279 selfloop transitions, 26 changer transitions 0/308 dead transitions. [2024-06-27 20:44:29,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 308 transitions, 4457 flow [2024-06-27 20:44:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-27 20:44:29,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:44:29,840 INFO L175 Difference]: Start difference. First operand has 219 places, 295 transitions, 3767 flow. Second operand 6 states and 92 transitions. [2024-06-27 20:44:29,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 308 transitions, 4457 flow [2024-06-27 20:44:30,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 308 transitions, 4321 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:30,237 INFO L231 Difference]: Finished difference. Result has 217 places, 297 transitions, 3731 flow [2024-06-27 20:44:30,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3631, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3731, PETRI_PLACES=217, PETRI_TRANSITIONS=297} [2024-06-27 20:44:30,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-27 20:44:30,238 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 297 transitions, 3731 flow [2024-06-27 20:44:30,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:30,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:30,238 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 20:44:30,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:44:30,238 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:30,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash -27825318, now seen corresponding path program 3 times [2024-06-27 20:44:30,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:30,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653284924] [2024-06-27 20:44:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:30,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:30,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:30,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653284924] [2024-06-27 20:44:30,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653284924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:30,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:30,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:30,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51007138] [2024-06-27 20:44:30,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:30,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:30,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:30,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:30,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 297 transitions, 3731 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:30,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:30,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:30,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:31,742 INFO L124 PetriNetUnfolderBase]: 3397/5234 cut-off events. [2024-06-27 20:44:31,743 INFO L125 PetriNetUnfolderBase]: For 251938/251956 co-relation queries the response was YES. [2024-06-27 20:44:31,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38298 conditions, 5234 events. 3397/5234 cut-off events. For 251938/251956 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 28772 event pairs, 874 based on Foata normal form. 18/5250 useless extension candidates. Maximal degree in co-relation 38192. Up to 5147 conditions per place. [2024-06-27 20:44:31,797 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 288 selfloop transitions, 27 changer transitions 0/318 dead transitions. [2024-06-27 20:44:31,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 318 transitions, 4493 flow [2024-06-27 20:44:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 20:44:31,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:44:31,798 INFO L175 Difference]: Start difference. First operand has 217 places, 297 transitions, 3731 flow. Second operand 7 states and 108 transitions. [2024-06-27 20:44:31,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 318 transitions, 4493 flow [2024-06-27 20:44:32,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 318 transitions, 4417 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:32,181 INFO L231 Difference]: Finished difference. Result has 220 places, 300 transitions, 3779 flow [2024-06-27 20:44:32,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3779, PETRI_PLACES=220, PETRI_TRANSITIONS=300} [2024-06-27 20:44:32,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-27 20:44:32,182 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 300 transitions, 3779 flow [2024-06-27 20:44:32,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:32,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:32,182 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 20:44:32,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:44:32,183 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:32,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash -827015108, now seen corresponding path program 4 times [2024-06-27 20:44:32,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:32,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500707304] [2024-06-27 20:44:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:32,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500707304] [2024-06-27 20:44:32,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500707304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:32,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:32,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:32,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576254175] [2024-06-27 20:44:32,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:32,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:32,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:32,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 300 transitions, 3779 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:32,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:32,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:32,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:33,618 INFO L124 PetriNetUnfolderBase]: 3415/5259 cut-off events. [2024-06-27 20:44:33,618 INFO L125 PetriNetUnfolderBase]: For 261313/261331 co-relation queries the response was YES. [2024-06-27 20:44:33,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38988 conditions, 5259 events. 3415/5259 cut-off events. For 261313/261331 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28891 event pairs, 876 based on Foata normal form. 18/5275 useless extension candidates. Maximal degree in co-relation 38881. Up to 5112 conditions per place. [2024-06-27 20:44:33,678 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 277 selfloop transitions, 47 changer transitions 0/327 dead transitions. [2024-06-27 20:44:33,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 327 transitions, 4747 flow [2024-06-27 20:44:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:44:33,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 20:44:33,679 INFO L175 Difference]: Start difference. First operand has 220 places, 300 transitions, 3779 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:44:33,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 327 transitions, 4747 flow [2024-06-27 20:44:34,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 327 transitions, 4591 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:34,132 INFO L231 Difference]: Finished difference. Result has 222 places, 309 transitions, 3894 flow [2024-06-27 20:44:34,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3894, PETRI_PLACES=222, PETRI_TRANSITIONS=309} [2024-06-27 20:44:34,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 20:44:34,133 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 309 transitions, 3894 flow [2024-06-27 20:44:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:34,133 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 20:44:34,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:44:34,133 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:34,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1968227836, now seen corresponding path program 5 times [2024-06-27 20:44:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085750466] [2024-06-27 20:44:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:34,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:34,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085750466] [2024-06-27 20:44:34,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085750466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:34,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:34,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:34,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187535116] [2024-06-27 20:44:34,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:34,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:34,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:34,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:34,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:34,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:34,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 309 transitions, 3894 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:34,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:34,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:34,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:35,635 INFO L124 PetriNetUnfolderBase]: 3425/5273 cut-off events. [2024-06-27 20:44:35,635 INFO L125 PetriNetUnfolderBase]: For 271698/271716 co-relation queries the response was YES. [2024-06-27 20:44:35,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39629 conditions, 5273 events. 3425/5273 cut-off events. For 271698/271716 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29012 event pairs, 879 based on Foata normal form. 18/5289 useless extension candidates. Maximal degree in co-relation 39521. Up to 5212 conditions per place. [2024-06-27 20:44:35,690 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 297 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2024-06-27 20:44:35,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 324 transitions, 4658 flow [2024-06-27 20:44:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-27 20:44:35,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-27 20:44:35,691 INFO L175 Difference]: Start difference. First operand has 222 places, 309 transitions, 3894 flow. Second operand 7 states and 102 transitions. [2024-06-27 20:44:35,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 324 transitions, 4658 flow [2024-06-27 20:44:36,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 324 transitions, 4569 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:36,138 INFO L231 Difference]: Finished difference. Result has 226 places, 312 transitions, 3935 flow [2024-06-27 20:44:36,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3807, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3935, PETRI_PLACES=226, PETRI_TRANSITIONS=312} [2024-06-27 20:44:36,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-27 20:44:36,138 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 312 transitions, 3935 flow [2024-06-27 20:44:36,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:36,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:36,139 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 20:44:36,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:44:36,139 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:36,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:36,139 INFO L85 PathProgramCache]: Analyzing trace with hash -599113958, now seen corresponding path program 6 times [2024-06-27 20:44:36,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:36,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382030162] [2024-06-27 20:44:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:36,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:36,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:36,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382030162] [2024-06-27 20:44:36,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382030162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:36,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:36,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:36,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139539767] [2024-06-27 20:44:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:36,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:36,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:36,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:36,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 312 transitions, 3935 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:36,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:36,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:36,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:37,672 INFO L124 PetriNetUnfolderBase]: 3419/5265 cut-off events. [2024-06-27 20:44:37,673 INFO L125 PetriNetUnfolderBase]: For 267341/267359 co-relation queries the response was YES. [2024-06-27 20:44:37,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39178 conditions, 5265 events. 3419/5265 cut-off events. For 267341/267359 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 28944 event pairs, 874 based on Foata normal form. 18/5281 useless extension candidates. Maximal degree in co-relation 39068. Up to 5184 conditions per place. [2024-06-27 20:44:37,724 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 290 selfloop transitions, 32 changer transitions 0/325 dead transitions. [2024-06-27 20:44:37,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 325 transitions, 4639 flow [2024-06-27 20:44:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-27 20:44:37,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-27 20:44:37,725 INFO L175 Difference]: Start difference. First operand has 226 places, 312 transitions, 3935 flow. Second operand 7 states and 104 transitions. [2024-06-27 20:44:37,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 325 transitions, 4639 flow [2024-06-27 20:44:38,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 325 transitions, 4490 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:38,099 INFO L231 Difference]: Finished difference. Result has 228 places, 312 transitions, 3856 flow [2024-06-27 20:44:38,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3856, PETRI_PLACES=228, PETRI_TRANSITIONS=312} [2024-06-27 20:44:38,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-27 20:44:38,099 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 312 transitions, 3856 flow [2024-06-27 20:44:38,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:38,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:38,100 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 20:44:38,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:44:38,100 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:38,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash -604818950, now seen corresponding path program 2 times [2024-06-27 20:44:38,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:38,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138827348] [2024-06-27 20:44:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:38,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:38,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138827348] [2024-06-27 20:44:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138827348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:38,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:38,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028336635] [2024-06-27 20:44:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:38,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:38,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:38,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:38,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 312 transitions, 3856 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:38,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:38,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:38,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:40,045 INFO L124 PetriNetUnfolderBase]: 3427/5277 cut-off events. [2024-06-27 20:44:40,045 INFO L125 PetriNetUnfolderBase]: For 274815/274833 co-relation queries the response was YES. [2024-06-27 20:44:40,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39328 conditions, 5277 events. 3427/5277 cut-off events. For 274815/274833 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29014 event pairs, 880 based on Foata normal form. 18/5293 useless extension candidates. Maximal degree in co-relation 39218. Up to 5205 conditions per place. [2024-06-27 20:44:40,098 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 294 selfloop transitions, 29 changer transitions 0/326 dead transitions. [2024-06-27 20:44:40,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 326 transitions, 4590 flow [2024-06-27 20:44:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-27 20:44:40,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678571428571429 [2024-06-27 20:44:40,099 INFO L175 Difference]: Start difference. First operand has 228 places, 312 transitions, 3856 flow. Second operand 7 states and 103 transitions. [2024-06-27 20:44:40,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 326 transitions, 4590 flow [2024-06-27 20:44:40,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 326 transitions, 4448 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:40,569 INFO L231 Difference]: Finished difference. Result has 228 places, 314 transitions, 3823 flow [2024-06-27 20:44:40,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3823, PETRI_PLACES=228, PETRI_TRANSITIONS=314} [2024-06-27 20:44:40,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-27 20:44:40,570 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 314 transitions, 3823 flow [2024-06-27 20:44:40,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:40,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:40,570 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 20:44:40,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:44:40,570 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:40,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:40,570 INFO L85 PathProgramCache]: Analyzing trace with hash -590534150, now seen corresponding path program 3 times [2024-06-27 20:44:40,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:40,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644791650] [2024-06-27 20:44:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:40,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644791650] [2024-06-27 20:44:41,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644791650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:41,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:41,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:41,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713951267] [2024-06-27 20:44:41,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:41,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:41,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:41,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:41,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 314 transitions, 3823 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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 20:44:41,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:41,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:41,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:42,260 INFO L124 PetriNetUnfolderBase]: 3422/5270 cut-off events. [2024-06-27 20:44:42,260 INFO L125 PetriNetUnfolderBase]: For 281170/281188 co-relation queries the response was YES. [2024-06-27 20:44:42,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39280 conditions, 5270 events. 3422/5270 cut-off events. For 281170/281188 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28916 event pairs, 877 based on Foata normal form. 18/5286 useless extension candidates. Maximal degree in co-relation 39170. Up to 5178 conditions per place. [2024-06-27 20:44:42,307 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 293 selfloop transitions, 33 changer transitions 0/329 dead transitions. [2024-06-27 20:44:42,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 329 transitions, 4569 flow [2024-06-27 20:44:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-27 20:44:42,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678571428571429 [2024-06-27 20:44:42,308 INFO L175 Difference]: Start difference. First operand has 228 places, 314 transitions, 3823 flow. Second operand 7 states and 103 transitions. [2024-06-27 20:44:42,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 329 transitions, 4569 flow [2024-06-27 20:44:42,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 329 transitions, 4476 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:42,745 INFO L231 Difference]: Finished difference. Result has 230 places, 316 transitions, 3851 flow [2024-06-27 20:44:42,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3730, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3851, PETRI_PLACES=230, PETRI_TRANSITIONS=316} [2024-06-27 20:44:42,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-27 20:44:42,745 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 316 transitions, 3851 flow [2024-06-27 20:44:42,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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 20:44:42,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:42,746 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 20:44:42,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:44:42,746 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:42,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash -20198822, now seen corresponding path program 1 times [2024-06-27 20:44:42,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:42,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705649994] [2024-06-27 20:44:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:43,421 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 20:44:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:43,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705649994] [2024-06-27 20:44:43,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705649994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:43,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:43,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:43,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142523983] [2024-06-27 20:44:43,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:43,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:43,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:43,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:43,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 316 transitions, 3851 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:43,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:43,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:44,542 INFO L124 PetriNetUnfolderBase]: 3462/5326 cut-off events. [2024-06-27 20:44:44,542 INFO L125 PetriNetUnfolderBase]: For 298559/298577 co-relation queries the response was YES. [2024-06-27 20:44:44,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39970 conditions, 5326 events. 3462/5326 cut-off events. For 298559/298577 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 29286 event pairs, 889 based on Foata normal form. 24/5348 useless extension candidates. Maximal degree in co-relation 39859. Up to 5134 conditions per place. [2024-06-27 20:44:44,596 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 304 selfloop transitions, 37 changer transitions 0/344 dead transitions. [2024-06-27 20:44:44,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 344 transitions, 4727 flow [2024-06-27 20:44:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:44:44,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:44:44,598 INFO L175 Difference]: Start difference. First operand has 230 places, 316 transitions, 3851 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:44:44,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 344 transitions, 4727 flow [2024-06-27 20:44:45,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 344 transitions, 4622 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:45,067 INFO L231 Difference]: Finished difference. Result has 233 places, 320 transitions, 3904 flow [2024-06-27 20:44:45,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3904, PETRI_PLACES=233, PETRI_TRANSITIONS=320} [2024-06-27 20:44:45,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-27 20:44:45,068 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 320 transitions, 3904 flow [2024-06-27 20:44:45,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:45,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:45,068 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 20:44:45,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:44:45,068 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 20:44:45,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1280323756, now seen corresponding path program 2 times [2024-06-27 20:44:45,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:45,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872906104] [2024-06-27 20:44:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:45,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:45,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:45,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872906104] [2024-06-27 20:44:45,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872906104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:45,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:45,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:45,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761250468] [2024-06-27 20:44:45,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:45,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:45,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:45,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:45,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:45,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:45,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 320 transitions, 3904 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:45,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:45,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:46,857 INFO L124 PetriNetUnfolderBase]: 3498/5388 cut-off events. [2024-06-27 20:44:46,857 INFO L125 PetriNetUnfolderBase]: For 305515/305515 co-relation queries the response was YES. [2024-06-27 20:44:46,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41148 conditions, 5388 events. 3498/5388 cut-off events. For 305515/305515 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29809 event pairs, 1637 based on Foata normal form. 4/5391 useless extension candidates. Maximal degree in co-relation 41036. Up to 5223 conditions per place. [2024-06-27 20:44:46,909 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 37 changer transitions 0/356 dead transitions. [2024-06-27 20:44:46,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 356 transitions, 5053 flow [2024-06-27 20:44:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:44:46,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 20:44:46,910 INFO L175 Difference]: Start difference. First operand has 233 places, 320 transitions, 3904 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:44:46,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 356 transitions, 5053 flow [2024-06-27 20:44:47,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 356 transitions, 4895 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:47,397 INFO L231 Difference]: Finished difference. Result has 237 places, 331 transitions, 4037 flow [2024-06-27 20:44:47,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3778, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4037, PETRI_PLACES=237, PETRI_TRANSITIONS=331} [2024-06-27 20:44:47,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-27 20:44:47,398 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 331 transitions, 4037 flow [2024-06-27 20:44:47,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:47,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:47,398 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 20:44:47,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:44:47,398 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 20:44:47,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:47,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1284965386, now seen corresponding path program 3 times [2024-06-27 20:44:47,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:47,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342997764] [2024-06-27 20:44:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:47,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:48,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:48,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342997764] [2024-06-27 20:44:48,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342997764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:48,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:48,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:48,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391696226] [2024-06-27 20:44:48,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:48,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:48,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:48,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:48,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:48,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:48,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 331 transitions, 4037 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:48,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:48,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:48,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:49,184 INFO L124 PetriNetUnfolderBase]: 3518/5416 cut-off events. [2024-06-27 20:44:49,184 INFO L125 PetriNetUnfolderBase]: For 317541/317541 co-relation queries the response was YES. [2024-06-27 20:44:49,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41833 conditions, 5416 events. 3518/5416 cut-off events. For 317541/317541 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29948 event pairs, 1641 based on Foata normal form. 4/5419 useless extension candidates. Maximal degree in co-relation 41718. Up to 5336 conditions per place. [2024-06-27 20:44:49,238 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 326 selfloop transitions, 23 changer transitions 0/352 dead transitions. [2024-06-27 20:44:49,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 352 transitions, 4888 flow [2024-06-27 20:44:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:44:49,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:44:49,239 INFO L175 Difference]: Start difference. First operand has 237 places, 331 transitions, 4037 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:44:49,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 352 transitions, 4888 flow [2024-06-27 20:44:49,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 352 transitions, 4807 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:49,872 INFO L231 Difference]: Finished difference. Result has 242 places, 334 transitions, 4071 flow [2024-06-27 20:44:49,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4071, PETRI_PLACES=242, PETRI_TRANSITIONS=334} [2024-06-27 20:44:49,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-27 20:44:49,873 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 334 transitions, 4071 flow [2024-06-27 20:44:49,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:49,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:49,873 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 20:44:49,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:44:49,873 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:49,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash -15430278, now seen corresponding path program 1 times [2024-06-27 20:44:49,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:49,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457727283] [2024-06-27 20:44:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:49,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:50,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:50,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457727283] [2024-06-27 20:44:50,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457727283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:50,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:50,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:50,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362023917] [2024-06-27 20:44:50,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:50,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:50,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:50,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:50,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 334 transitions, 4071 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:50,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:50,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:50,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:51,793 INFO L124 PetriNetUnfolderBase]: 3526/5428 cut-off events. [2024-06-27 20:44:51,793 INFO L125 PetriNetUnfolderBase]: For 324056/324056 co-relation queries the response was YES. [2024-06-27 20:44:51,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42017 conditions, 5428 events. 3526/5428 cut-off events. For 324056/324056 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30036 event pairs, 1641 based on Foata normal form. 2/5429 useless extension candidates. Maximal degree in co-relation 41900. Up to 5366 conditions per place. [2024-06-27 20:44:51,861 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 329 selfloop transitions, 19 changer transitions 0/351 dead transitions. [2024-06-27 20:44:51,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 351 transitions, 4861 flow [2024-06-27 20:44:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-27 20:44:51,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-27 20:44:51,863 INFO L175 Difference]: Start difference. First operand has 242 places, 334 transitions, 4071 flow. Second operand 7 states and 106 transitions. [2024-06-27 20:44:51,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 351 transitions, 4861 flow [2024-06-27 20:44:52,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 351 transitions, 4787 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:52,599 INFO L231 Difference]: Finished difference. Result has 243 places, 336 transitions, 4082 flow [2024-06-27 20:44:52,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3997, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4082, PETRI_PLACES=243, PETRI_TRANSITIONS=336} [2024-06-27 20:44:52,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-27 20:44:52,600 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 336 transitions, 4082 flow [2024-06-27 20:44:52,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:52,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:52,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:52,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:44:52,600 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:52,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1973949692, now seen corresponding path program 4 times [2024-06-27 20:44:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:52,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88630608] [2024-06-27 20:44:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:52,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88630608] [2024-06-27 20:44:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88630608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:53,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:53,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:53,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057663635] [2024-06-27 20:44:53,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:53,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:53,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:53,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 336 transitions, 4082 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:53,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:53,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:53,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:54,411 INFO L124 PetriNetUnfolderBase]: 3520/5420 cut-off events. [2024-06-27 20:44:54,412 INFO L125 PetriNetUnfolderBase]: For 331024/331024 co-relation queries the response was YES. [2024-06-27 20:44:54,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42049 conditions, 5420 events. 3520/5420 cut-off events. For 331024/331024 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30023 event pairs, 1647 based on Foata normal form. 2/5421 useless extension candidates. Maximal degree in co-relation 41931. Up to 5363 conditions per place. [2024-06-27 20:44:54,466 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 331 selfloop transitions, 18 changer transitions 0/352 dead transitions. [2024-06-27 20:44:54,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 352 transitions, 4892 flow [2024-06-27 20:44:54,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-27 20:44:54,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353125 [2024-06-27 20:44:54,467 INFO L175 Difference]: Start difference. First operand has 243 places, 336 transitions, 4082 flow. Second operand 8 states and 113 transitions. [2024-06-27 20:44:54,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 352 transitions, 4892 flow [2024-06-27 20:44:55,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 352 transitions, 4823 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:55,115 INFO L231 Difference]: Finished difference. Result has 246 places, 339 transitions, 4121 flow [2024-06-27 20:44:55,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4013, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4121, PETRI_PLACES=246, PETRI_TRANSITIONS=339} [2024-06-27 20:44:55,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-27 20:44:55,116 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 339 transitions, 4121 flow [2024-06-27 20:44:55,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:55,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:55,116 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 20:44:55,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:44:55,116 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:55,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:55,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2095859066, now seen corresponding path program 2 times [2024-06-27 20:44:55,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:55,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790622402] [2024-06-27 20:44:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:55,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:55,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:55,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790622402] [2024-06-27 20:44:55,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790622402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:55,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:55,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587509590] [2024-06-27 20:44:55,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:55,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:55,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:55,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:55,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 339 transitions, 4121 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:55,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:55,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:55,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:56,941 INFO L124 PetriNetUnfolderBase]: 3528/5432 cut-off events. [2024-06-27 20:44:56,941 INFO L125 PetriNetUnfolderBase]: For 340505/340505 co-relation queries the response was YES. [2024-06-27 20:44:56,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42356 conditions, 5432 events. 3528/5432 cut-off events. For 340505/340505 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30098 event pairs, 1651 based on Foata normal form. 2/5433 useless extension candidates. Maximal degree in co-relation 42237. Up to 5385 conditions per place. [2024-06-27 20:44:57,000 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 335 selfloop transitions, 14 changer transitions 0/352 dead transitions. [2024-06-27 20:44:57,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 352 transitions, 4897 flow [2024-06-27 20:44:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-27 20:44:57,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 20:44:57,001 INFO L175 Difference]: Start difference. First operand has 246 places, 339 transitions, 4121 flow. Second operand 7 states and 100 transitions. [2024-06-27 20:44:57,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 352 transitions, 4897 flow [2024-06-27 20:44:57,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 352 transitions, 4817 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:57,677 INFO L231 Difference]: Finished difference. Result has 247 places, 341 transitions, 4120 flow [2024-06-27 20:44:57,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4120, PETRI_PLACES=247, PETRI_TRANSITIONS=341} [2024-06-27 20:44:57,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-27 20:44:57,678 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 341 transitions, 4120 flow [2024-06-27 20:44:57,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:57,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:57,678 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 20:44:57,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:44:57,678 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:57,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash -590825116, now seen corresponding path program 1 times [2024-06-27 20:44:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:57,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372183783] [2024-06-27 20:44:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:58,375 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 20:44:58,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:58,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372183783] [2024-06-27 20:44:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372183783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:58,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:58,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:58,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459406043] [2024-06-27 20:44:58,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:58,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:58,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:58,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:58,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:58,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:44:58,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 341 transitions, 4120 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:58,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:58,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:44:58,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:59,507 INFO L124 PetriNetUnfolderBase]: 3525/5428 cut-off events. [2024-06-27 20:44:59,507 INFO L125 PetriNetUnfolderBase]: For 348176/348176 co-relation queries the response was YES. [2024-06-27 20:44:59,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42481 conditions, 5428 events. 3525/5428 cut-off events. For 348176/348176 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30076 event pairs, 1648 based on Foata normal form. 1/5428 useless extension candidates. Maximal degree in co-relation 42361. Up to 5370 conditions per place. [2024-06-27 20:44:59,575 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 329 selfloop transitions, 23 changer transitions 0/355 dead transitions. [2024-06-27 20:44:59,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 355 transitions, 4920 flow [2024-06-27 20:44:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-27 20:44:59,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-27 20:44:59,576 INFO L175 Difference]: Start difference. First operand has 247 places, 341 transitions, 4120 flow. Second operand 7 states and 102 transitions. [2024-06-27 20:44:59,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 355 transitions, 4920 flow [2024-06-27 20:45:00,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 355 transitions, 4857 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:00,386 INFO L231 Difference]: Finished difference. Result has 249 places, 344 transitions, 4173 flow [2024-06-27 20:45:00,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4173, PETRI_PLACES=249, PETRI_TRANSITIONS=344} [2024-06-27 20:45:00,387 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 20:45:00,387 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 344 transitions, 4173 flow [2024-06-27 20:45:00,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:00,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:00,387 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 20:45:00,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:45:00,387 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:00,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash -590824868, now seen corresponding path program 3 times [2024-06-27 20:45:00,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:00,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023399734] [2024-06-27 20:45:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:01,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023399734] [2024-06-27 20:45:01,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023399734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:01,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:01,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:01,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658175535] [2024-06-27 20:45:01,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:01,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:01,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:01,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:01,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 344 transitions, 4173 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:01,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:01,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:01,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:02,222 INFO L124 PetriNetUnfolderBase]: 3533/5440 cut-off events. [2024-06-27 20:45:02,222 INFO L125 PetriNetUnfolderBase]: For 359518/359518 co-relation queries the response was YES. [2024-06-27 20:45:02,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43027 conditions, 5440 events. 3533/5440 cut-off events. For 359518/359518 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30109 event pairs, 1652 based on Foata normal form. 2/5441 useless extension candidates. Maximal degree in co-relation 42906. Up to 5381 conditions per place. [2024-06-27 20:45:02,285 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 333 selfloop transitions, 21 changer transitions 0/357 dead transitions. [2024-06-27 20:45:02,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 357 transitions, 4965 flow [2024-06-27 20:45:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-27 20:45:02,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3607142857142857 [2024-06-27 20:45:02,286 INFO L175 Difference]: Start difference. First operand has 249 places, 344 transitions, 4173 flow. Second operand 7 states and 101 transitions. [2024-06-27 20:45:02,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 357 transitions, 4965 flow [2024-06-27 20:45:02,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 357 transitions, 4889 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:02,990 INFO L231 Difference]: Finished difference. Result has 251 places, 346 transitions, 4199 flow [2024-06-27 20:45:02,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4199, PETRI_PLACES=251, PETRI_TRANSITIONS=346} [2024-06-27 20:45:02,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-27 20:45:02,991 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 346 transitions, 4199 flow [2024-06-27 20:45:02,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:02,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:02,991 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 20:45:02,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:45:02,991 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:02,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2104429946, now seen corresponding path program 4 times [2024-06-27 20:45:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:02,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511539200] [2024-06-27 20:45:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:03,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:03,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511539200] [2024-06-27 20:45:03,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511539200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:03,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:03,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:03,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93664526] [2024-06-27 20:45:03,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:03,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:03,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:03,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:03,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 346 transitions, 4199 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:03,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:03,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:03,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:04,828 INFO L124 PetriNetUnfolderBase]: 3528/5433 cut-off events. [2024-06-27 20:45:04,828 INFO L125 PetriNetUnfolderBase]: For 366290/366290 co-relation queries the response was YES. [2024-06-27 20:45:04,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43118 conditions, 5433 events. 3528/5433 cut-off events. For 366290/366290 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 30017 event pairs, 1651 based on Foata normal form. 2/5434 useless extension candidates. Maximal degree in co-relation 42996. Up to 5381 conditions per place. [2024-06-27 20:45:04,891 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 341 selfloop transitions, 15 changer transitions 0/359 dead transitions. [2024-06-27 20:45:04,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 359 transitions, 4993 flow [2024-06-27 20:45:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-27 20:45:04,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 20:45:04,892 INFO L175 Difference]: Start difference. First operand has 251 places, 346 transitions, 4199 flow. Second operand 7 states and 100 transitions. [2024-06-27 20:45:04,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 359 transitions, 4993 flow [2024-06-27 20:45:05,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 359 transitions, 4907 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:05,565 INFO L231 Difference]: Finished difference. Result has 253 places, 348 transitions, 4204 flow [2024-06-27 20:45:05,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4117, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4204, PETRI_PLACES=253, PETRI_TRANSITIONS=348} [2024-06-27 20:45:05,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-27 20:45:05,565 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 348 transitions, 4204 flow [2024-06-27 20:45:05,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:05,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:05,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:05,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:45:05,566 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:05,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -997869429, now seen corresponding path program 1 times [2024-06-27 20:45:05,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:05,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256895051] [2024-06-27 20:45:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:05,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:06,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256895051] [2024-06-27 20:45:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256895051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:06,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:06,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:45:06,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200338442] [2024-06-27 20:45:06,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:45:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:45:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:45:06,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:06,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 348 transitions, 4204 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:06,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:06,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:06,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:08,323 INFO L124 PetriNetUnfolderBase]: 3657/5634 cut-off events. [2024-06-27 20:45:08,323 INFO L125 PetriNetUnfolderBase]: For 381453/381469 co-relation queries the response was YES. [2024-06-27 20:45:08,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44132 conditions, 5634 events. 3657/5634 cut-off events. For 381453/381469 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31379 event pairs, 886 based on Foata normal form. 28/5661 useless extension candidates. Maximal degree in co-relation 44009. Up to 5341 conditions per place. [2024-06-27 20:45:08,400 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 358 selfloop transitions, 55 changer transitions 0/416 dead transitions. [2024-06-27 20:45:08,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 416 transitions, 5406 flow [2024-06-27 20:45:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:45:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:45:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-27 20:45:08,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:45:08,401 INFO L175 Difference]: Start difference. First operand has 253 places, 348 transitions, 4204 flow. Second operand 12 states and 190 transitions. [2024-06-27 20:45:08,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 416 transitions, 5406 flow [2024-06-27 20:45:09,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 416 transitions, 5335 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:09,088 INFO L231 Difference]: Finished difference. Result has 265 places, 366 transitions, 4512 flow [2024-06-27 20:45:09,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4512, PETRI_PLACES=265, PETRI_TRANSITIONS=366} [2024-06-27 20:45:09,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-27 20:45:09,089 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 366 transitions, 4512 flow [2024-06-27 20:45:09,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:09,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:09,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:09,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:45:09,090 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:09,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1935768681, now seen corresponding path program 2 times [2024-06-27 20:45:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:09,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777482386] [2024-06-27 20:45:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:09,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:10,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777482386] [2024-06-27 20:45:10,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777482386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:10,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:10,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:45:10,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863684139] [2024-06-27 20:45:10,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:10,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:45:10,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:10,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:45:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:45:10,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:10,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 366 transitions, 4512 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:10,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:10,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:10,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:11,959 INFO L124 PetriNetUnfolderBase]: 3698/5706 cut-off events. [2024-06-27 20:45:11,959 INFO L125 PetriNetUnfolderBase]: For 401588/401612 co-relation queries the response was YES. [2024-06-27 20:45:12,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45558 conditions, 5706 events. 3698/5706 cut-off events. For 401588/401612 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31666 event pairs, 734 based on Foata normal form. 34/5738 useless extension candidates. Maximal degree in co-relation 45429. Up to 5235 conditions per place. [2024-06-27 20:45:12,028 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 56 changer transitions 0/408 dead transitions. [2024-06-27 20:45:12,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 408 transitions, 5552 flow [2024-06-27 20:45:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 20:45:12,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925 [2024-06-27 20:45:12,030 INFO L175 Difference]: Start difference. First operand has 265 places, 366 transitions, 4512 flow. Second operand 10 states and 157 transitions. [2024-06-27 20:45:12,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 408 transitions, 5552 flow [2024-06-27 20:45:12,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 408 transitions, 5426 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:12,739 INFO L231 Difference]: Finished difference. Result has 272 places, 369 transitions, 4610 flow [2024-06-27 20:45:12,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4400, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4610, PETRI_PLACES=272, PETRI_TRANSITIONS=369} [2024-06-27 20:45:12,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-27 20:45:12,740 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 369 transitions, 4610 flow [2024-06-27 20:45:12,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:12,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:12,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:12,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:45:12,740 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:12,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2094819543, now seen corresponding path program 3 times [2024-06-27 20:45:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:12,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602486457] [2024-06-27 20:45:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:14,001 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 20:45:14,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:14,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602486457] [2024-06-27 20:45:14,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602486457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:14,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:14,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:45:14,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752689693] [2024-06-27 20:45:14,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:14,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:45:14,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:14,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:45:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:45:14,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:14,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 369 transitions, 4610 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:14,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:14,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:14,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:15,446 INFO L124 PetriNetUnfolderBase]: 3756/5812 cut-off events. [2024-06-27 20:45:15,447 INFO L125 PetriNetUnfolderBase]: For 411157/411175 co-relation queries the response was YES. [2024-06-27 20:45:15,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46286 conditions, 5812 events. 3756/5812 cut-off events. For 411157/411175 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32747 event pairs, 782 based on Foata normal form. 28/5838 useless extension candidates. Maximal degree in co-relation 46155. Up to 5167 conditions per place. [2024-06-27 20:45:15,519 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 314 selfloop transitions, 95 changer transitions 0/412 dead transitions. [2024-06-27 20:45:15,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 5662 flow [2024-06-27 20:45:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 20:45:15,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-27 20:45:15,520 INFO L175 Difference]: Start difference. First operand has 272 places, 369 transitions, 4610 flow. Second operand 10 states and 161 transitions. [2024-06-27 20:45:15,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 5662 flow [2024-06-27 20:45:16,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 412 transitions, 5486 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:16,215 INFO L231 Difference]: Finished difference. Result has 276 places, 373 transitions, 4746 flow [2024-06-27 20:45:16,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4746, PETRI_PLACES=276, PETRI_TRANSITIONS=373} [2024-06-27 20:45:16,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-27 20:45:16,215 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 373 transitions, 4746 flow [2024-06-27 20:45:16,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:16,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:16,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:16,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:45:16,216 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:16,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2094963693, now seen corresponding path program 4 times [2024-06-27 20:45:16,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:16,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411843983] [2024-06-27 20:45:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:16,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:18,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411843983] [2024-06-27 20:45:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411843983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:18,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:18,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:45:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432862640] [2024-06-27 20:45:18,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:18,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:45:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:18,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:45:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:45:18,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:18,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 373 transitions, 4746 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:18,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:18,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:18,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:20,291 INFO L124 PetriNetUnfolderBase]: 3797/5879 cut-off events. [2024-06-27 20:45:20,291 INFO L125 PetriNetUnfolderBase]: For 417630/417648 co-relation queries the response was YES. [2024-06-27 20:45:20,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46830 conditions, 5879 events. 3797/5879 cut-off events. For 417630/417648 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33179 event pairs, 751 based on Foata normal form. 28/5905 useless extension candidates. Maximal degree in co-relation 46697. Up to 5110 conditions per place. [2024-06-27 20:45:20,369 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 311 selfloop transitions, 100 changer transitions 0/414 dead transitions. [2024-06-27 20:45:20,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 414 transitions, 5785 flow [2024-06-27 20:45:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 20:45:20,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:45:20,370 INFO L175 Difference]: Start difference. First operand has 276 places, 373 transitions, 4746 flow. Second operand 10 states and 160 transitions. [2024-06-27 20:45:20,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 414 transitions, 5785 flow [2024-06-27 20:45:21,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 414 transitions, 5525 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:21,112 INFO L231 Difference]: Finished difference. Result has 280 places, 375 transitions, 4787 flow [2024-06-27 20:45:21,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4787, PETRI_PLACES=280, PETRI_TRANSITIONS=375} [2024-06-27 20:45:21,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 20:45:21,113 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 375 transitions, 4787 flow [2024-06-27 20:45:21,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:21,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:21,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:21,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:45:21,113 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:21,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2094969490, now seen corresponding path program 1 times [2024-06-27 20:45:21,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:21,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106978634] [2024-06-27 20:45:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:23,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:23,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106978634] [2024-06-27 20:45:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106978634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:23,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:23,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:45:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398904858] [2024-06-27 20:45:23,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:23,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:45:23,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:45:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:45:23,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:23,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 375 transitions, 4787 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:23,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:23,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:23,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:24,952 INFO L124 PetriNetUnfolderBase]: 3830/5938 cut-off events. [2024-06-27 20:45:24,952 INFO L125 PetriNetUnfolderBase]: For 432407/432425 co-relation queries the response was YES. [2024-06-27 20:45:25,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47092 conditions, 5938 events. 3830/5938 cut-off events. For 432407/432425 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33641 event pairs, 769 based on Foata normal form. 32/5968 useless extension candidates. Maximal degree in co-relation 46957. Up to 4814 conditions per place. [2024-06-27 20:45:25,027 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 298 selfloop transitions, 116 changer transitions 0/417 dead transitions. [2024-06-27 20:45:25,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 417 transitions, 5849 flow [2024-06-27 20:45:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 20:45:25,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-27 20:45:25,029 INFO L175 Difference]: Start difference. First operand has 280 places, 375 transitions, 4787 flow. Second operand 10 states and 164 transitions. [2024-06-27 20:45:25,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 417 transitions, 5849 flow [2024-06-27 20:45:25,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 417 transitions, 5575 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:25,619 INFO L231 Difference]: Finished difference. Result has 283 places, 376 transitions, 4842 flow [2024-06-27 20:45:25,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4842, PETRI_PLACES=283, PETRI_TRANSITIONS=376} [2024-06-27 20:45:25,619 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-27 20:45:25,619 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 376 transitions, 4842 flow [2024-06-27 20:45:25,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:25,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:25,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:45:25,620 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:25,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2091244623, now seen corresponding path program 5 times [2024-06-27 20:45:25,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:25,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781707752] [2024-06-27 20:45:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:25,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:27,179 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 20:45:27,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:27,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781707752] [2024-06-27 20:45:27,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781707752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:27,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:27,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:45:27,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733930969] [2024-06-27 20:45:27,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:27,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:45:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:45:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:45:27,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:27,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 376 transitions, 4842 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:27,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:27,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:27,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:28,814 INFO L124 PetriNetUnfolderBase]: 3871/6009 cut-off events. [2024-06-27 20:45:28,814 INFO L125 PetriNetUnfolderBase]: For 436174/436192 co-relation queries the response was YES. [2024-06-27 20:45:28,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47703 conditions, 6009 events. 3871/6009 cut-off events. For 436174/436192 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34244 event pairs, 866 based on Foata normal form. 28/6035 useless extension candidates. Maximal degree in co-relation 47567. Up to 5612 conditions per place. [2024-06-27 20:45:28,892 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 66 changer transitions 0/418 dead transitions. [2024-06-27 20:45:28,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 418 transitions, 5896 flow [2024-06-27 20:45:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 20:45:28,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-27 20:45:28,893 INFO L175 Difference]: Start difference. First operand has 283 places, 376 transitions, 4842 flow. Second operand 10 states and 158 transitions. [2024-06-27 20:45:28,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 418 transitions, 5896 flow [2024-06-27 20:45:29,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 418 transitions, 5653 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:29,677 INFO L231 Difference]: Finished difference. Result has 286 places, 379 transitions, 4830 flow [2024-06-27 20:45:29,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4830, PETRI_PLACES=286, PETRI_TRANSITIONS=379} [2024-06-27 20:45:29,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-27 20:45:29,677 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 379 transitions, 4830 flow [2024-06-27 20:45:29,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:29,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:29,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:29,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:45:29,678 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 20:45:29,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1436798268, now seen corresponding path program 1 times [2024-06-27 20:45:29,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:29,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310428614] [2024-06-27 20:45:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:29,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:30,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:30,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310428614] [2024-06-27 20:45:30,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310428614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:30,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:30,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:30,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442093503] [2024-06-27 20:45:30,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:30,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:30,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:30,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:30,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 379 transitions, 4830 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:30,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:30,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:30,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:32,117 INFO L124 PetriNetUnfolderBase]: 3971/6159 cut-off events. [2024-06-27 20:45:32,117 INFO L125 PetriNetUnfolderBase]: For 473957/473981 co-relation queries the response was YES. [2024-06-27 20:45:32,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49351 conditions, 6159 events. 3971/6159 cut-off events. For 473957/473981 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 35115 event pairs, 869 based on Foata normal form. 30/6187 useless extension candidates. Maximal degree in co-relation 49213. Up to 5774 conditions per place. [2024-06-27 20:45:32,194 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 350 selfloop transitions, 60 changer transitions 0/413 dead transitions. [2024-06-27 20:45:32,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 413 transitions, 6008 flow [2024-06-27 20:45:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:45:32,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:45:32,195 INFO L175 Difference]: Start difference. First operand has 286 places, 379 transitions, 4830 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:45:32,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 413 transitions, 6008 flow [2024-06-27 20:45:33,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 413 transitions, 5808 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:33,061 INFO L231 Difference]: Finished difference. Result has 288 places, 381 transitions, 4805 flow [2024-06-27 20:45:33,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4630, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4805, PETRI_PLACES=288, PETRI_TRANSITIONS=381} [2024-06-27 20:45:33,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-27 20:45:33,061 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 381 transitions, 4805 flow [2024-06-27 20:45:33,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:33,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:33,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:33,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:45:33,062 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 20:45:33,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1436529498, now seen corresponding path program 2 times [2024-06-27 20:45:33,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:33,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018989786] [2024-06-27 20:45:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:33,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:33,877 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 20:45:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018989786] [2024-06-27 20:45:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018989786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:33,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:33,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:33,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336902622] [2024-06-27 20:45:33,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:33,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:33,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:33,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:33,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:33,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 381 transitions, 4805 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:33,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:33,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:35,588 INFO L124 PetriNetUnfolderBase]: 4015/6227 cut-off events. [2024-06-27 20:45:35,588 INFO L125 PetriNetUnfolderBase]: For 490929/490947 co-relation queries the response was YES. [2024-06-27 20:45:35,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49678 conditions, 6227 events. 4015/6227 cut-off events. For 490929/490947 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35721 event pairs, 1030 based on Foata normal form. 28/6253 useless extension candidates. Maximal degree in co-relation 49539. Up to 5978 conditions per place. [2024-06-27 20:45:35,663 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 350 selfloop transitions, 55 changer transitions 0/408 dead transitions. [2024-06-27 20:45:35,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 408 transitions, 5777 flow [2024-06-27 20:45:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 20:45:35,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-27 20:45:35,664 INFO L175 Difference]: Start difference. First operand has 288 places, 381 transitions, 4805 flow. Second operand 9 states and 139 transitions. [2024-06-27 20:45:35,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 408 transitions, 5777 flow [2024-06-27 20:45:36,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 408 transitions, 5690 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:36,567 INFO L231 Difference]: Finished difference. Result has 292 places, 382 transitions, 4861 flow [2024-06-27 20:45:36,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4861, PETRI_PLACES=292, PETRI_TRANSITIONS=382} [2024-06-27 20:45:36,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-27 20:45:36,567 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 382 transitions, 4861 flow [2024-06-27 20:45:36,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:36,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:36,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:45:36,568 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 20:45:36,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1433938332, now seen corresponding path program 1 times [2024-06-27 20:45:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:36,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648611500] [2024-06-27 20:45:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:36,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:37,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:37,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648611500] [2024-06-27 20:45:37,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648611500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:37,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:37,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:37,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577524060] [2024-06-27 20:45:37,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:37,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:37,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:37,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 382 transitions, 4861 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:37,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:37,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:37,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:38,559 INFO L124 PetriNetUnfolderBase]: 4072/6310 cut-off events. [2024-06-27 20:45:38,559 INFO L125 PetriNetUnfolderBase]: For 497551/497579 co-relation queries the response was YES. [2024-06-27 20:45:38,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50935 conditions, 6310 events. 4072/6310 cut-off events. For 497551/497579 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36261 event pairs, 901 based on Foata normal form. 30/6336 useless extension candidates. Maximal degree in co-relation 50794. Up to 5974 conditions per place. [2024-06-27 20:45:38,649 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 332 selfloop transitions, 84 changer transitions 0/419 dead transitions. [2024-06-27 20:45:38,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 419 transitions, 6117 flow [2024-06-27 20:45:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:45:38,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 20:45:38,650 INFO L175 Difference]: Start difference. First operand has 292 places, 382 transitions, 4861 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:45:38,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 419 transitions, 6117 flow [2024-06-27 20:45:39,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 419 transitions, 5992 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:39,798 INFO L231 Difference]: Finished difference. Result has 295 places, 393 transitions, 5124 flow [2024-06-27 20:45:39,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4742, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5124, PETRI_PLACES=295, PETRI_TRANSITIONS=393} [2024-06-27 20:45:39,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-27 20:45:39,799 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 393 transitions, 5124 flow [2024-06-27 20:45:39,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:39,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:39,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:39,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:45:39,800 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:39,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:39,800 INFO L85 PathProgramCache]: Analyzing trace with hash 591671022, now seen corresponding path program 2 times [2024-06-27 20:45:39,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:39,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969282923] [2024-06-27 20:45:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:39,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:40,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969282923] [2024-06-27 20:45:40,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969282923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:40,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:40,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:40,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922276779] [2024-06-27 20:45:40,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:40,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:40,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:40,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:40,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:40,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 393 transitions, 5124 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:40,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:40,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:40,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:41,853 INFO L124 PetriNetUnfolderBase]: 4092/6336 cut-off events. [2024-06-27 20:45:41,853 INFO L125 PetriNetUnfolderBase]: For 515131/515159 co-relation queries the response was YES. [2024-06-27 20:45:41,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52302 conditions, 6336 events. 4092/6336 cut-off events. For 515131/515159 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36389 event pairs, 1004 based on Foata normal form. 30/6362 useless extension candidates. Maximal degree in co-relation 52159. Up to 6120 conditions per place. [2024-06-27 20:45:41,939 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 347 selfloop transitions, 68 changer transitions 0/418 dead transitions. [2024-06-27 20:45:41,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 418 transitions, 6134 flow [2024-06-27 20:45:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 20:45:41,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-27 20:45:41,940 INFO L175 Difference]: Start difference. First operand has 295 places, 393 transitions, 5124 flow. Second operand 9 states and 136 transitions. [2024-06-27 20:45:41,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 418 transitions, 6134 flow [2024-06-27 20:45:43,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 418 transitions, 5963 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 20:45:43,060 INFO L231 Difference]: Finished difference. Result has 301 places, 398 transitions, 5201 flow [2024-06-27 20:45:43,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4979, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5201, PETRI_PLACES=301, PETRI_TRANSITIONS=398} [2024-06-27 20:45:43,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-27 20:45:43,061 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 398 transitions, 5201 flow [2024-06-27 20:45:43,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:43,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:43,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:43,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:45:43,061 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:43,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:43,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1318468416, now seen corresponding path program 1 times [2024-06-27 20:45:43,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:43,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832825532] [2024-06-27 20:45:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:43,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:43,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832825532] [2024-06-27 20:45:43,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832825532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:43,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:43,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:43,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420184189] [2024-06-27 20:45:43,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:43,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:43,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:43,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 398 transitions, 5201 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:43,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:45,113 INFO L124 PetriNetUnfolderBase]: 4129/6385 cut-off events. [2024-06-27 20:45:45,114 INFO L125 PetriNetUnfolderBase]: For 525259/525277 co-relation queries the response was YES. [2024-06-27 20:45:45,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52983 conditions, 6385 events. 4129/6385 cut-off events. For 525259/525277 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36613 event pairs, 1026 based on Foata normal form. 18/6401 useless extension candidates. Maximal degree in co-relation 52838. Up to 6206 conditions per place. [2024-06-27 20:45:45,203 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 367 selfloop transitions, 57 changer transitions 0/427 dead transitions. [2024-06-27 20:45:45,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 427 transitions, 6454 flow [2024-06-27 20:45:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:45:45,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:45:45,204 INFO L175 Difference]: Start difference. First operand has 301 places, 398 transitions, 5201 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:45:45,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 427 transitions, 6454 flow [2024-06-27 20:45:46,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 427 transitions, 6270 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:46,274 INFO L231 Difference]: Finished difference. Result has 304 places, 407 transitions, 5354 flow [2024-06-27 20:45:46,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5017, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5354, PETRI_PLACES=304, PETRI_TRANSITIONS=407} [2024-06-27 20:45:46,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-27 20:45:46,275 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 407 transitions, 5354 flow [2024-06-27 20:45:46,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:46,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:46,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:46,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:45:46,275 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:46,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash -445414698, now seen corresponding path program 3 times [2024-06-27 20:45:46,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:46,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243679908] [2024-06-27 20:45:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:46,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243679908] [2024-06-27 20:45:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243679908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:46,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:46,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:46,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187690875] [2024-06-27 20:45:46,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:46,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:46,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:46,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:46,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 407 transitions, 5354 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:46,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:46,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:46,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:48,320 INFO L124 PetriNetUnfolderBase]: 4235/6537 cut-off events. [2024-06-27 20:45:48,320 INFO L125 PetriNetUnfolderBase]: For 571853/571866 co-relation queries the response was YES. [2024-06-27 20:45:48,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55356 conditions, 6537 events. 4235/6537 cut-off events. For 571853/571866 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37539 event pairs, 753 based on Foata normal form. 14/6546 useless extension candidates. Maximal degree in co-relation 55209. Up to 5983 conditions per place. [2024-06-27 20:45:48,409 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 330 selfloop transitions, 113 changer transitions 0/446 dead transitions. [2024-06-27 20:45:48,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 446 transitions, 6958 flow [2024-06-27 20:45:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:45:48,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 20:45:48,410 INFO L175 Difference]: Start difference. First operand has 304 places, 407 transitions, 5354 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:45:48,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 446 transitions, 6958 flow [2024-06-27 20:45:49,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 446 transitions, 6815 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:49,559 INFO L231 Difference]: Finished difference. Result has 309 places, 420 transitions, 5856 flow [2024-06-27 20:45:49,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5856, PETRI_PLACES=309, PETRI_TRANSITIONS=420} [2024-06-27 20:45:49,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-27 20:45:49,560 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 420 transitions, 5856 flow [2024-06-27 20:45:49,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:49,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:49,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:45:49,560 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:49,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash -445086408, now seen corresponding path program 4 times [2024-06-27 20:45:49,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:49,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75073723] [2024-06-27 20:45:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:50,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:50,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75073723] [2024-06-27 20:45:50,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75073723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:50,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:50,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:50,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100598336] [2024-06-27 20:45:50,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:50,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:50,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:50,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:50,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:50,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:50,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 420 transitions, 5856 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:50,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:50,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:50,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:51,707 INFO L124 PetriNetUnfolderBase]: 4271/6587 cut-off events. [2024-06-27 20:45:51,708 INFO L125 PetriNetUnfolderBase]: For 585393/585406 co-relation queries the response was YES. [2024-06-27 20:45:51,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57171 conditions, 6587 events. 4271/6587 cut-off events. For 585393/585406 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37825 event pairs, 756 based on Foata normal form. 14/6596 useless extension candidates. Maximal degree in co-relation 57021. Up to 6014 conditions per place. [2024-06-27 20:45:51,794 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 321 selfloop transitions, 125 changer transitions 0/449 dead transitions. [2024-06-27 20:45:51,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 449 transitions, 7330 flow [2024-06-27 20:45:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:45:51,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 20:45:51,795 INFO L175 Difference]: Start difference. First operand has 309 places, 420 transitions, 5856 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:45:51,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 449 transitions, 7330 flow [2024-06-27 20:45:52,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 449 transitions, 7108 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-27 20:45:52,923 INFO L231 Difference]: Finished difference. Result has 314 places, 426 transitions, 6076 flow [2024-06-27 20:45:52,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5666, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6076, PETRI_PLACES=314, PETRI_TRANSITIONS=426} [2024-06-27 20:45:52,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-27 20:45:52,923 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 426 transitions, 6076 flow [2024-06-27 20:45:52,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:52,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:52,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:52,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:45:52,924 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 20:45:52,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash -445086222, now seen corresponding path program 2 times [2024-06-27 20:45:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:52,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327488946] [2024-06-27 20:45:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:53,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:53,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327488946] [2024-06-27 20:45:53,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327488946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:53,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:53,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:53,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476340674] [2024-06-27 20:45:53,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:53,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:53,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:53,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:53,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 426 transitions, 6076 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:53,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:53,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:53,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:55,158 INFO L124 PetriNetUnfolderBase]: 4281/6597 cut-off events. [2024-06-27 20:45:55,158 INFO L125 PetriNetUnfolderBase]: For 587993/588011 co-relation queries the response was YES. [2024-06-27 20:45:55,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57225 conditions, 6597 events. 4281/6597 cut-off events. For 587993/588011 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37917 event pairs, 1041 based on Foata normal form. 18/6613 useless extension candidates. Maximal degree in co-relation 57073. Up to 6468 conditions per place. [2024-06-27 20:45:55,241 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 397 selfloop transitions, 45 changer transitions 0/445 dead transitions. [2024-06-27 20:45:55,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 445 transitions, 7093 flow [2024-06-27 20:45:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:45:55,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 20:45:55,242 INFO L175 Difference]: Start difference. First operand has 314 places, 426 transitions, 6076 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:45:55,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 445 transitions, 7093 flow [2024-06-27 20:45:56,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 445 transitions, 6892 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:56,427 INFO L231 Difference]: Finished difference. Result has 318 places, 429 transitions, 6044 flow [2024-06-27 20:45:56,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5875, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6044, PETRI_PLACES=318, PETRI_TRANSITIONS=429} [2024-06-27 20:45:56,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-27 20:45:56,428 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 429 transitions, 6044 flow [2024-06-27 20:45:56,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:56,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:56,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:56,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:45:56,428 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 20:45:56,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash 602515938, now seen corresponding path program 3 times [2024-06-27 20:45:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320690625] [2024-06-27 20:45:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:57,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:57,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320690625] [2024-06-27 20:45:57,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320690625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:57,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:57,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:57,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721915261] [2024-06-27 20:45:57,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:57,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:57,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:57,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:57,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:45:57,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 429 transitions, 6044 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:57,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:57,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:45:57,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:58,663 INFO L124 PetriNetUnfolderBase]: 4275/6589 cut-off events. [2024-06-27 20:45:58,663 INFO L125 PetriNetUnfolderBase]: For 594228/594246 co-relation queries the response was YES. [2024-06-27 20:45:58,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56806 conditions, 6589 events. 4275/6589 cut-off events. For 594228/594246 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37877 event pairs, 1065 based on Foata normal form. 18/6605 useless extension candidates. Maximal degree in co-relation 56653. Up to 6504 conditions per place. [2024-06-27 20:45:58,746 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 407 selfloop transitions, 30 changer transitions 0/440 dead transitions. [2024-06-27 20:45:58,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 440 transitions, 6964 flow [2024-06-27 20:45:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-27 20:45:58,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:45:58,747 INFO L175 Difference]: Start difference. First operand has 318 places, 429 transitions, 6044 flow. Second operand 7 states and 105 transitions. [2024-06-27 20:45:58,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 440 transitions, 6964 flow [2024-06-27 20:46:00,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 440 transitions, 6806 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:00,041 INFO L231 Difference]: Finished difference. Result has 319 places, 429 transitions, 5956 flow [2024-06-27 20:46:00,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5886, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5956, PETRI_PLACES=319, PETRI_TRANSITIONS=429} [2024-06-27 20:46:00,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-27 20:46:00,041 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 429 transitions, 5956 flow [2024-06-27 20:46:00,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:00,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:00,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:00,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:46:00,042 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:00,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 602395782, now seen corresponding path program 5 times [2024-06-27 20:46:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808649593] [2024-06-27 20:46:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:00,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:00,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808649593] [2024-06-27 20:46:00,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808649593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:00,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:00,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:00,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270928229] [2024-06-27 20:46:00,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:00,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:00,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:00,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:00,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 429 transitions, 5956 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:00,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:00,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:00,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:02,081 INFO L124 PetriNetUnfolderBase]: 4263/6577 cut-off events. [2024-06-27 20:46:02,081 INFO L125 PetriNetUnfolderBase]: For 602640/602653 co-relation queries the response was YES. [2024-06-27 20:46:02,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56394 conditions, 6577 events. 4263/6577 cut-off events. For 602640/602653 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37804 event pairs, 909 based on Foata normal form. 14/6586 useless extension candidates. Maximal degree in co-relation 56240. Up to 6358 conditions per place. [2024-06-27 20:46:02,173 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 379 selfloop transitions, 60 changer transitions 0/442 dead transitions. [2024-06-27 20:46:02,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 442 transitions, 6892 flow [2024-06-27 20:46:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 20:46:02,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-27 20:46:02,174 INFO L175 Difference]: Start difference. First operand has 319 places, 429 transitions, 5956 flow. Second operand 7 states and 109 transitions. [2024-06-27 20:46:02,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 442 transitions, 6892 flow [2024-06-27 20:46:03,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 442 transitions, 6788 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:03,624 INFO L231 Difference]: Finished difference. Result has 321 places, 429 transitions, 5978 flow [2024-06-27 20:46:03,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5978, PETRI_PLACES=321, PETRI_TRANSITIONS=429} [2024-06-27 20:46:03,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-27 20:46:03,625 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 429 transitions, 5978 flow [2024-06-27 20:46:03,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:03,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:03,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:03,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:46:03,626 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:03,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:03,626 INFO L85 PathProgramCache]: Analyzing trace with hash 602783065, now seen corresponding path program 1 times [2024-06-27 20:46:03,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:03,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128690489] [2024-06-27 20:46:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:03,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:04,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:04,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128690489] [2024-06-27 20:46:04,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128690489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:04,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:04,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:04,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835008270] [2024-06-27 20:46:04,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:04,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:04,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:04,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:04,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:04,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 429 transitions, 5978 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:04,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:04,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:04,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:05,928 INFO L124 PetriNetUnfolderBase]: 4260/6569 cut-off events. [2024-06-27 20:46:05,928 INFO L125 PetriNetUnfolderBase]: For 603412/603430 co-relation queries the response was YES. [2024-06-27 20:46:06,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56426 conditions, 6569 events. 4260/6569 cut-off events. For 603412/603430 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37794 event pairs, 1057 based on Foata normal form. 17/6584 useless extension candidates. Maximal degree in co-relation 56271. Up to 6488 conditions per place. [2024-06-27 20:46:06,029 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 403 selfloop transitions, 34 changer transitions 0/440 dead transitions. [2024-06-27 20:46:06,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 440 transitions, 6952 flow [2024-06-27 20:46:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:46:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:46:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-27 20:46:06,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 20:46:06,030 INFO L175 Difference]: Start difference. First operand has 321 places, 429 transitions, 5978 flow. Second operand 6 states and 93 transitions. [2024-06-27 20:46:06,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 440 transitions, 6952 flow [2024-06-27 20:46:07,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 440 transitions, 6792 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:07,462 INFO L231 Difference]: Finished difference. Result has 321 places, 431 transitions, 5974 flow [2024-06-27 20:46:07,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5818, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5974, PETRI_PLACES=321, PETRI_TRANSITIONS=431} [2024-06-27 20:46:07,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-27 20:46:07,462 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 431 transitions, 5974 flow [2024-06-27 20:46:07,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:07,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:07,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:46:07,463 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:07,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:07,463 INFO L85 PathProgramCache]: Analyzing trace with hash 602515752, now seen corresponding path program 6 times [2024-06-27 20:46:07,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:07,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429217106] [2024-06-27 20:46:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:07,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:07,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429217106] [2024-06-27 20:46:07,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429217106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:07,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:07,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:07,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101352664] [2024-06-27 20:46:07,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:08,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:08,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 431 transitions, 5974 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:08,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:08,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:08,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:09,477 INFO L124 PetriNetUnfolderBase]: 4248/6557 cut-off events. [2024-06-27 20:46:09,478 INFO L125 PetriNetUnfolderBase]: For 614964/614977 co-relation queries the response was YES. [2024-06-27 20:46:09,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56056 conditions, 6557 events. 4248/6557 cut-off events. For 614964/614977 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37684 event pairs, 905 based on Foata normal form. 14/6566 useless extension candidates. Maximal degree in co-relation 55900. Up to 6264 conditions per place. [2024-06-27 20:46:09,574 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 367 selfloop transitions, 77 changer transitions 0/447 dead transitions. [2024-06-27 20:46:09,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 447 transitions, 7092 flow [2024-06-27 20:46:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:46:09,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 20:46:09,575 INFO L175 Difference]: Start difference. First operand has 321 places, 431 transitions, 5974 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:46:09,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 447 transitions, 7092 flow [2024-06-27 20:46:11,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 447 transitions, 6922 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:11,305 INFO L231 Difference]: Finished difference. Result has 323 places, 431 transitions, 5967 flow [2024-06-27 20:46:11,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5967, PETRI_PLACES=323, PETRI_TRANSITIONS=431} [2024-06-27 20:46:11,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-27 20:46:11,306 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 431 transitions, 5967 flow [2024-06-27 20:46:11,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:11,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:11,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:11,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:46:11,307 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 20:46:11,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:11,307 INFO L85 PathProgramCache]: Analyzing trace with hash -632034323, now seen corresponding path program 6 times [2024-06-27 20:46:11,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:11,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836611094] [2024-06-27 20:46:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:12,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836611094] [2024-06-27 20:46:12,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836611094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:12,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:12,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:46:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171756660] [2024-06-27 20:46:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:12,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:46:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:46:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:46:12,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:12,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 431 transitions, 5967 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:12,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:12,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:12,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:14,182 INFO L124 PetriNetUnfolderBase]: 4289/6624 cut-off events. [2024-06-27 20:46:14,183 INFO L125 PetriNetUnfolderBase]: For 627919/627937 co-relation queries the response was YES. [2024-06-27 20:46:14,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56622 conditions, 6624 events. 4289/6624 cut-off events. For 627919/627937 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38307 event pairs, 1026 based on Foata normal form. 28/6650 useless extension candidates. Maximal degree in co-relation 56466. Up to 6115 conditions per place. [2024-06-27 20:46:14,275 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 414 selfloop transitions, 57 changer transitions 0/474 dead transitions. [2024-06-27 20:46:14,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 474 transitions, 7175 flow [2024-06-27 20:46:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:46:14,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-27 20:46:14,277 INFO L175 Difference]: Start difference. First operand has 323 places, 431 transitions, 5967 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:46:14,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 474 transitions, 7175 flow [2024-06-27 20:46:16,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 7043 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:16,122 INFO L231 Difference]: Finished difference. Result has 329 places, 432 transitions, 6018 flow [2024-06-27 20:46:16,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6018, PETRI_PLACES=329, PETRI_TRANSITIONS=432} [2024-06-27 20:46:16,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 20:46:16,123 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 432 transitions, 6018 flow [2024-06-27 20:46:16,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:16,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:16,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:16,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:46:16,123 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 20:46:16,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash -831336113, now seen corresponding path program 7 times [2024-06-27 20:46:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410002253] [2024-06-27 20:46:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:16,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:17,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410002253] [2024-06-27 20:46:17,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410002253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:17,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:17,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:46:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230358574] [2024-06-27 20:46:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:17,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:46:17,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:46:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:46:17,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:17,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 432 transitions, 6018 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:17,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:17,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:17,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:18,959 INFO L124 PetriNetUnfolderBase]: 4269/6592 cut-off events. [2024-06-27 20:46:18,959 INFO L125 PetriNetUnfolderBase]: For 621508/621526 co-relation queries the response was YES. [2024-06-27 20:46:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55866 conditions, 6592 events. 4269/6592 cut-off events. For 621508/621526 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 38136 event pairs, 1021 based on Foata normal form. 28/6618 useless extension candidates. Maximal degree in co-relation 55709. Up to 6203 conditions per place. [2024-06-27 20:46:19,055 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 410 selfloop transitions, 57 changer transitions 0/470 dead transitions. [2024-06-27 20:46:19,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 470 transitions, 7111 flow [2024-06-27 20:46:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 20:46:19,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-27 20:46:19,057 INFO L175 Difference]: Start difference. First operand has 329 places, 432 transitions, 6018 flow. Second operand 10 states and 163 transitions. [2024-06-27 20:46:19,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 470 transitions, 7111 flow [2024-06-27 20:46:20,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 470 transitions, 6922 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:20,672 INFO L231 Difference]: Finished difference. Result has 332 places, 432 transitions, 5949 flow [2024-06-27 20:46:20,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5829, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5949, PETRI_PLACES=332, PETRI_TRANSITIONS=432} [2024-06-27 20:46:20,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-27 20:46:20,673 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 432 transitions, 5949 flow [2024-06-27 20:46:20,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:20,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:20,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:20,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:46:20,673 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:20,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash -214577413, now seen corresponding path program 8 times [2024-06-27 20:46:20,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:20,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732633481] [2024-06-27 20:46:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:20,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:22,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:22,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732633481] [2024-06-27 20:46:22,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732633481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:22,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:22,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:46:22,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801723742] [2024-06-27 20:46:22,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:22,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:46:22,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:22,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:46:22,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:46:22,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:22,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 432 transitions, 5949 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:22,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:22,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:22,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:24,101 INFO L124 PetriNetUnfolderBase]: 4344/6721 cut-off events. [2024-06-27 20:46:24,101 INFO L125 PetriNetUnfolderBase]: For 633831/633844 co-relation queries the response was YES. [2024-06-27 20:46:24,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56414 conditions, 6721 events. 4344/6721 cut-off events. For 633831/633844 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39074 event pairs, 785 based on Foata normal form. 22/6738 useless extension candidates. Maximal degree in co-relation 56256. Up to 6172 conditions per place. [2024-06-27 20:46:24,196 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 379 selfloop transitions, 93 changer transitions 0/475 dead transitions. [2024-06-27 20:46:24,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 475 transitions, 7137 flow [2024-06-27 20:46:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 20:46:24,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-27 20:46:24,197 INFO L175 Difference]: Start difference. First operand has 332 places, 432 transitions, 5949 flow. Second operand 10 states and 161 transitions. [2024-06-27 20:46:24,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 475 transitions, 7137 flow [2024-06-27 20:46:25,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 475 transitions, 6970 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:25,663 INFO L231 Difference]: Finished difference. Result has 335 places, 437 transitions, 6087 flow [2024-06-27 20:46:25,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5782, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6087, PETRI_PLACES=335, PETRI_TRANSITIONS=437} [2024-06-27 20:46:25,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-27 20:46:25,664 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 437 transitions, 6087 flow [2024-06-27 20:46:25,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:25,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:25,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:25,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:46:25,665 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:25,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:25,665 INFO L85 PathProgramCache]: Analyzing trace with hash -831480263, now seen corresponding path program 9 times [2024-06-27 20:46:25,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:25,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266462849] [2024-06-27 20:46:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:25,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:26,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:26,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266462849] [2024-06-27 20:46:26,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266462849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:26,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:26,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:46:26,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213879033] [2024-06-27 20:46:26,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:26,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:46:26,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:26,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:46:26,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:46:26,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:26,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 437 transitions, 6087 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:26,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:26,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:26,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:28,549 INFO L124 PetriNetUnfolderBase]: 4385/6788 cut-off events. [2024-06-27 20:46:28,549 INFO L125 PetriNetUnfolderBase]: For 654457/654475 co-relation queries the response was YES. [2024-06-27 20:46:28,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57263 conditions, 6788 events. 4385/6788 cut-off events. For 654457/654475 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39591 event pairs, 1046 based on Foata normal form. 28/6814 useless extension candidates. Maximal degree in co-relation 57103. Up to 6220 conditions per place. [2024-06-27 20:46:28,643 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 417 selfloop transitions, 62 changer transitions 0/482 dead transitions. [2024-06-27 20:46:28,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 482 transitions, 7358 flow [2024-06-27 20:46:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:46:28,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-27 20:46:28,644 INFO L175 Difference]: Start difference. First operand has 335 places, 437 transitions, 6087 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:46:28,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 482 transitions, 7358 flow [2024-06-27 20:46:30,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 482 transitions, 7121 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:30,201 INFO L231 Difference]: Finished difference. Result has 339 places, 440 transitions, 6107 flow [2024-06-27 20:46:30,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5850, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6107, PETRI_PLACES=339, PETRI_TRANSITIONS=440} [2024-06-27 20:46:30,202 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-27 20:46:30,202 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 440 transitions, 6107 flow [2024-06-27 20:46:30,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:30,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:30,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:46:30,203 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 20:46:30,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1828288297, now seen corresponding path program 10 times [2024-06-27 20:46:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854480454] [2024-06-27 20:46:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:31,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854480454] [2024-06-27 20:46:31,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854480454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:31,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:31,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:46:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474967376] [2024-06-27 20:46:31,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:46:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:46:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:46:31,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:31,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 440 transitions, 6107 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:31,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:31,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:31,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:33,194 INFO L124 PetriNetUnfolderBase]: 4426/6863 cut-off events. [2024-06-27 20:46:33,194 INFO L125 PetriNetUnfolderBase]: For 672576/672589 co-relation queries the response was YES. [2024-06-27 20:46:33,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57836 conditions, 6863 events. 4426/6863 cut-off events. For 672576/672589 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40227 event pairs, 805 based on Foata normal form. 22/6880 useless extension candidates. Maximal degree in co-relation 57674. Up to 6000 conditions per place. [2024-06-27 20:46:33,289 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 380 selfloop transitions, 98 changer transitions 0/481 dead transitions. [2024-06-27 20:46:33,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 481 transitions, 7349 flow [2024-06-27 20:46:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:46:33,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 20:46:33,290 INFO L175 Difference]: Start difference. First operand has 339 places, 440 transitions, 6107 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:46:33,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 481 transitions, 7349 flow [2024-06-27 20:46:34,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 481 transitions, 7123 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:34,994 INFO L231 Difference]: Finished difference. Result has 342 places, 444 transitions, 6214 flow [2024-06-27 20:46:34,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5881, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6214, PETRI_PLACES=342, PETRI_TRANSITIONS=444} [2024-06-27 20:46:34,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-27 20:46:34,994 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 444 transitions, 6214 flow [2024-06-27 20:46:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:34,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:34,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:34,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:46:34,995 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 20:46:34,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1831863217, now seen corresponding path program 11 times [2024-06-27 20:46:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:34,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109383036] [2024-06-27 20:46:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:34,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:36,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:36,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109383036] [2024-06-27 20:46:36,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109383036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:36,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:36,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:46:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102689050] [2024-06-27 20:46:36,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:36,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:46:36,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:46:36,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:46:36,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:36,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 444 transitions, 6214 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:36,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:36,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:36,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:38,379 INFO L124 PetriNetUnfolderBase]: 4406/6831 cut-off events. [2024-06-27 20:46:38,379 INFO L125 PetriNetUnfolderBase]: For 657443/657456 co-relation queries the response was YES. [2024-06-27 20:46:38,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56756 conditions, 6831 events. 4406/6831 cut-off events. For 657443/657456 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39886 event pairs, 791 based on Foata normal form. 22/6848 useless extension candidates. Maximal degree in co-relation 56592. Up to 6356 conditions per place. [2024-06-27 20:46:38,485 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 396 selfloop transitions, 84 changer transitions 0/483 dead transitions. [2024-06-27 20:46:38,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 483 transitions, 7250 flow [2024-06-27 20:46:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 20:46:38,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-27 20:46:38,486 INFO L175 Difference]: Start difference. First operand has 342 places, 444 transitions, 6214 flow. Second operand 10 states and 158 transitions. [2024-06-27 20:46:38,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 483 transitions, 7250 flow [2024-06-27 20:46:40,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 483 transitions, 6991 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:40,718 INFO L231 Difference]: Finished difference. Result has 346 places, 445 transitions, 6068 flow [2024-06-27 20:46:40,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5863, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6068, PETRI_PLACES=346, PETRI_TRANSITIONS=445} [2024-06-27 20:46:40,719 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-27 20:46:40,719 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 445 transitions, 6068 flow [2024-06-27 20:46:40,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:40,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:40,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:40,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:46:40,719 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:40,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:40,720 INFO L85 PathProgramCache]: Analyzing trace with hash 602792520, now seen corresponding path program 1 times [2024-06-27 20:46:40,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:40,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426490207] [2024-06-27 20:46:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:40,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:41,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:41,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426490207] [2024-06-27 20:46:41,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426490207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:41,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:41,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:41,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686220840] [2024-06-27 20:46:41,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:41,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:41,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:41,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:41,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 445 transitions, 6068 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:41,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:41,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:41,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:43,108 INFO L124 PetriNetUnfolderBase]: 4434/6875 cut-off events. [2024-06-27 20:46:43,109 INFO L125 PetriNetUnfolderBase]: For 664885/664894 co-relation queries the response was YES. [2024-06-27 20:46:43,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56754 conditions, 6875 events. 4434/6875 cut-off events. For 664885/664894 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40235 event pairs, 941 based on Foata normal form. 14/6884 useless extension candidates. Maximal degree in co-relation 56588. Up to 6494 conditions per place. [2024-06-27 20:46:43,200 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 60 changer transitions 0/468 dead transitions. [2024-06-27 20:46:43,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 468 transitions, 7342 flow [2024-06-27 20:46:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:46:43,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 20:46:43,201 INFO L175 Difference]: Start difference. First operand has 346 places, 445 transitions, 6068 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:46:43,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 468 transitions, 7342 flow [2024-06-27 20:46:45,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 468 transitions, 7054 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:45,173 INFO L231 Difference]: Finished difference. Result has 345 places, 446 transitions, 5932 flow [2024-06-27 20:46:45,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5780, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5932, PETRI_PLACES=345, PETRI_TRANSITIONS=446} [2024-06-27 20:46:45,174 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-27 20:46:45,174 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 446 transitions, 5932 flow [2024-06-27 20:46:45,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:45,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:45,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:45,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:46:45,174 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:45,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash 602779500, now seen corresponding path program 2 times [2024-06-27 20:46:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:45,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802352171] [2024-06-27 20:46:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:45,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:45,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802352171] [2024-06-27 20:46:45,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802352171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:45,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:45,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:45,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486443180] [2024-06-27 20:46:45,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:45,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:45,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:45,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:45,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:45,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 446 transitions, 5932 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:45,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:45,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:45,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:47,637 INFO L124 PetriNetUnfolderBase]: 4406/6835 cut-off events. [2024-06-27 20:46:47,637 INFO L125 PetriNetUnfolderBase]: For 643868/643877 co-relation queries the response was YES. [2024-06-27 20:46:47,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54844 conditions, 6835 events. 4406/6835 cut-off events. For 643868/643877 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39999 event pairs, 945 based on Foata normal form. 18/6848 useless extension candidates. Maximal degree in co-relation 54678. Up to 6578 conditions per place. [2024-06-27 20:46:47,723 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 406 selfloop transitions, 56 changer transitions 0/465 dead transitions. [2024-06-27 20:46:47,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 465 transitions, 6988 flow [2024-06-27 20:46:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:46:47,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 20:46:47,725 INFO L175 Difference]: Start difference. First operand has 345 places, 446 transitions, 5932 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:46:47,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 465 transitions, 6988 flow [2024-06-27 20:46:49,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 465 transitions, 6853 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:49,870 INFO L231 Difference]: Finished difference. Result has 348 places, 446 transitions, 5915 flow [2024-06-27 20:46:49,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5915, PETRI_PLACES=348, PETRI_TRANSITIONS=446} [2024-06-27 20:46:49,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-27 20:46:49,870 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 446 transitions, 5915 flow [2024-06-27 20:46:49,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:49,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:49,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:49,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:46:49,871 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:49,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:49,871 INFO L85 PathProgramCache]: Analyzing trace with hash -634832640, now seen corresponding path program 4 times [2024-06-27 20:46:49,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:49,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655148331] [2024-06-27 20:46:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:50,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:50,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655148331] [2024-06-27 20:46:50,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655148331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:50,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:50,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:50,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816754586] [2024-06-27 20:46:50,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:50,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:50,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:50,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:50,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 446 transitions, 5915 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:50,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:50,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:50,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:52,201 INFO L124 PetriNetUnfolderBase]: 4469/6921 cut-off events. [2024-06-27 20:46:52,201 INFO L125 PetriNetUnfolderBase]: For 620973/620991 co-relation queries the response was YES. [2024-06-27 20:46:52,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55292 conditions, 6921 events. 4469/6921 cut-off events. For 620973/620991 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40548 event pairs, 1107 based on Foata normal form. 18/6937 useless extension candidates. Maximal degree in co-relation 55125. Up to 6703 conditions per place. [2024-06-27 20:46:52,315 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 429 selfloop transitions, 51 changer transitions 0/483 dead transitions. [2024-06-27 20:46:52,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 483 transitions, 7192 flow [2024-06-27 20:46:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:46:52,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:46:52,316 INFO L175 Difference]: Start difference. First operand has 348 places, 446 transitions, 5915 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:46:52,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 483 transitions, 7192 flow [2024-06-27 20:46:54,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 483 transitions, 7052 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:54,764 INFO L231 Difference]: Finished difference. Result has 350 places, 460 transitions, 6125 flow [2024-06-27 20:46:54,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6125, PETRI_PLACES=350, PETRI_TRANSITIONS=460} [2024-06-27 20:46:54,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-27 20:46:54,765 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 460 transitions, 6125 flow [2024-06-27 20:46:54,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:54,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:54,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:46:54,765 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:54,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash 127210996, now seen corresponding path program 5 times [2024-06-27 20:46:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322733764] [2024-06-27 20:46:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:55,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:55,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322733764] [2024-06-27 20:46:55,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322733764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:55,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:55,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:55,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765716507] [2024-06-27 20:46:55,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:55,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:55,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:55,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:55,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:55,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 460 transitions, 6125 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:55,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:55,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:55,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:56,992 INFO L124 PetriNetUnfolderBase]: 4503/6968 cut-off events. [2024-06-27 20:46:56,992 INFO L125 PetriNetUnfolderBase]: For 647196/647214 co-relation queries the response was YES. [2024-06-27 20:46:57,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56602 conditions, 6968 events. 4503/6968 cut-off events. For 647196/647214 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 40896 event pairs, 1078 based on Foata normal form. 18/6984 useless extension candidates. Maximal degree in co-relation 56433. Up to 6676 conditions per place. [2024-06-27 20:46:57,092 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 405 selfloop transitions, 83 changer transitions 0/491 dead transitions. [2024-06-27 20:46:57,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 491 transitions, 7823 flow [2024-06-27 20:46:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:46:57,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:46:57,093 INFO L175 Difference]: Start difference. First operand has 350 places, 460 transitions, 6125 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:46:57,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 491 transitions, 7823 flow [2024-06-27 20:46:59,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 491 transitions, 7658 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:59,136 INFO L231 Difference]: Finished difference. Result has 354 places, 469 transitions, 6420 flow [2024-06-27 20:46:59,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6420, PETRI_PLACES=354, PETRI_TRANSITIONS=469} [2024-06-27 20:46:59,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-27 20:46:59,136 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 469 transitions, 6420 flow [2024-06-27 20:46:59,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:59,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:59,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:59,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:46:59,137 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:59,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:59,137 INFO L85 PathProgramCache]: Analyzing trace with hash 795041394, now seen corresponding path program 6 times [2024-06-27 20:46:59,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:59,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735536297] [2024-06-27 20:46:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:59,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:59,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:59,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735536297] [2024-06-27 20:46:59,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735536297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:59,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:59,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:59,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902198440] [2024-06-27 20:46:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:59,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:59,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:59,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:46:59,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 469 transitions, 6420 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:59,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:59,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:46:59,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:01,379 INFO L124 PetriNetUnfolderBase]: 4513/6982 cut-off events. [2024-06-27 20:47:01,379 INFO L125 PetriNetUnfolderBase]: For 663452/663470 co-relation queries the response was YES. [2024-06-27 20:47:01,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57155 conditions, 6982 events. 4513/6982 cut-off events. For 663452/663470 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40932 event pairs, 1104 based on Foata normal form. 18/6998 useless extension candidates. Maximal degree in co-relation 56985. Up to 6864 conditions per place. [2024-06-27 20:47:01,484 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 458 selfloop transitions, 36 changer transitions 0/497 dead transitions. [2024-06-27 20:47:01,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 497 transitions, 7791 flow [2024-06-27 20:47:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 20:47:01,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-27 20:47:01,485 INFO L175 Difference]: Start difference. First operand has 354 places, 469 transitions, 6420 flow. Second operand 9 states and 136 transitions. [2024-06-27 20:47:01,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 497 transitions, 7791 flow [2024-06-27 20:47:03,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 497 transitions, 7502 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:03,778 INFO L231 Difference]: Finished difference. Result has 359 places, 473 transitions, 6340 flow [2024-06-27 20:47:03,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6163, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6340, PETRI_PLACES=359, PETRI_TRANSITIONS=473} [2024-06-27 20:47:03,779 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-27 20:47:03,779 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 473 transitions, 6340 flow [2024-06-27 20:47:03,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:03,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:03,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:47:03,779 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:03,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 27267740, now seen corresponding path program 7 times [2024-06-27 20:47:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:03,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389699994] [2024-06-27 20:47:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:03,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:04,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:04,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389699994] [2024-06-27 20:47:04,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389699994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:04,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:04,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:04,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698350550] [2024-06-27 20:47:04,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:04,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:04,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:04,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:04,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 473 transitions, 6340 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:04,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:04,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:04,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:06,054 INFO L124 PetriNetUnfolderBase]: 4565/7058 cut-off events. [2024-06-27 20:47:06,055 INFO L125 PetriNetUnfolderBase]: For 672231/672240 co-relation queries the response was YES. [2024-06-27 20:47:06,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57834 conditions, 7058 events. 4565/7058 cut-off events. For 672231/672240 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 41410 event pairs, 826 based on Foata normal form. 10/7063 useless extension candidates. Maximal degree in co-relation 57663. Up to 6680 conditions per place. [2024-06-27 20:47:06,156 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 420 selfloop transitions, 85 changer transitions 0/508 dead transitions. [2024-06-27 20:47:06,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 508 transitions, 7822 flow [2024-06-27 20:47:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 20:47:06,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-27 20:47:06,157 INFO L175 Difference]: Start difference. First operand has 359 places, 473 transitions, 6340 flow. Second operand 10 states and 153 transitions. [2024-06-27 20:47:06,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 508 transitions, 7822 flow [2024-06-27 20:47:08,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 508 transitions, 7726 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:08,177 INFO L231 Difference]: Finished difference. Result has 363 places, 479 transitions, 6602 flow [2024-06-27 20:47:08,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6602, PETRI_PLACES=363, PETRI_TRANSITIONS=479} [2024-06-27 20:47:08,178 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 20:47:08,178 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 479 transitions, 6602 flow [2024-06-27 20:47:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:08,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:08,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:47:08,178 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:08,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash 795190938, now seen corresponding path program 8 times [2024-06-27 20:47:08,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:08,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363765526] [2024-06-27 20:47:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:08,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:08,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363765526] [2024-06-27 20:47:08,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363765526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:08,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:08,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:08,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587275396] [2024-06-27 20:47:08,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:08,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:08,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:08,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:08,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:08,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:08,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 479 transitions, 6602 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:08,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:08,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:08,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:10,436 INFO L124 PetriNetUnfolderBase]: 4553/7042 cut-off events. [2024-06-27 20:47:10,437 INFO L125 PetriNetUnfolderBase]: For 676243/676252 co-relation queries the response was YES. [2024-06-27 20:47:10,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58037 conditions, 7042 events. 4553/7042 cut-off events. For 676243/676252 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 41326 event pairs, 824 based on Foata normal form. 10/7047 useless extension candidates. Maximal degree in co-relation 57865. Up to 6672 conditions per place. [2024-06-27 20:47:10,531 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 414 selfloop transitions, 84 changer transitions 0/501 dead transitions. [2024-06-27 20:47:10,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 501 transitions, 7694 flow [2024-06-27 20:47:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:47:10,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:47:10,532 INFO L175 Difference]: Start difference. First operand has 363 places, 479 transitions, 6602 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:47:10,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 501 transitions, 7694 flow [2024-06-27 20:47:12,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 501 transitions, 7384 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:12,429 INFO L231 Difference]: Finished difference. Result has 365 places, 479 transitions, 6466 flow [2024-06-27 20:47:12,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6292, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6466, PETRI_PLACES=365, PETRI_TRANSITIONS=479} [2024-06-27 20:47:12,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-27 20:47:12,430 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 479 transitions, 6466 flow [2024-06-27 20:47:12,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:12,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:12,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:12,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:47:12,430 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:12,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash 795191124, now seen corresponding path program 7 times [2024-06-27 20:47:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:12,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174197150] [2024-06-27 20:47:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:12,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:13,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:13,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174197150] [2024-06-27 20:47:13,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174197150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:13,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:13,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:13,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738261992] [2024-06-27 20:47:13,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:13,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:13,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 479 transitions, 6466 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:13,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:13,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:14,904 INFO L124 PetriNetUnfolderBase]: 4547/7030 cut-off events. [2024-06-27 20:47:14,904 INFO L125 PetriNetUnfolderBase]: For 671066/671084 co-relation queries the response was YES. [2024-06-27 20:47:14,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57692 conditions, 7030 events. 4547/7030 cut-off events. For 671066/671084 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 41287 event pairs, 1114 based on Foata normal form. 18/7046 useless extension candidates. Maximal degree in co-relation 57519. Up to 6930 conditions per place. [2024-06-27 20:47:14,993 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 464 selfloop transitions, 30 changer transitions 0/497 dead transitions. [2024-06-27 20:47:14,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 497 transitions, 7526 flow [2024-06-27 20:47:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 20:47:14,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-27 20:47:14,994 INFO L175 Difference]: Start difference. First operand has 365 places, 479 transitions, 6466 flow. Second operand 8 states and 119 transitions. [2024-06-27 20:47:14,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 497 transitions, 7526 flow [2024-06-27 20:47:16,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 497 transitions, 7314 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:16,894 INFO L231 Difference]: Finished difference. Result has 366 places, 479 transitions, 6320 flow [2024-06-27 20:47:16,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6320, PETRI_PLACES=366, PETRI_TRANSITIONS=479} [2024-06-27 20:47:16,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 20:47:16,895 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 479 transitions, 6320 flow [2024-06-27 20:47:16,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:16,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:16,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:16,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:47:16,896 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:16,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:16,896 INFO L85 PathProgramCache]: Analyzing trace with hash -478799286, now seen corresponding path program 9 times [2024-06-27 20:47:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576479059] [2024-06-27 20:47:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:16,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:17,442 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 20:47:17,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576479059] [2024-06-27 20:47:17,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576479059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:17,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:17,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:17,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165013828] [2024-06-27 20:47:17,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:17,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:17,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:17,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:17,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:17,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 479 transitions, 6320 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:17,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:17,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:17,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:19,065 INFO L124 PetriNetUnfolderBase]: 4567/7062 cut-off events. [2024-06-27 20:47:19,065 INFO L125 PetriNetUnfolderBase]: For 692603/692612 co-relation queries the response was YES. [2024-06-27 20:47:19,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57864 conditions, 7062 events. 4567/7062 cut-off events. For 692603/692612 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 41463 event pairs, 811 based on Foata normal form. 10/7067 useless extension candidates. Maximal degree in co-relation 57690. Up to 6335 conditions per place. [2024-06-27 20:47:19,170 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 368 selfloop transitions, 139 changer transitions 0/510 dead transitions. [2024-06-27 20:47:19,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 510 transitions, 8032 flow [2024-06-27 20:47:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:47:19,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:47:19,172 INFO L175 Difference]: Start difference. First operand has 366 places, 479 transitions, 6320 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:47:19,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 510 transitions, 8032 flow [2024-06-27 20:47:21,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 510 transitions, 7972 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:21,689 INFO L231 Difference]: Finished difference. Result has 368 places, 485 transitions, 6738 flow [2024-06-27 20:47:21,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6738, PETRI_PLACES=368, PETRI_TRANSITIONS=485} [2024-06-27 20:47:21,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-27 20:47:21,690 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 485 transitions, 6738 flow [2024-06-27 20:47:21,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:21,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:21,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:21,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:47:21,691 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:21,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash -478799100, now seen corresponding path program 8 times [2024-06-27 20:47:21,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:21,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431186816] [2024-06-27 20:47:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:22,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:22,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431186816] [2024-06-27 20:47:22,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431186816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:22,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:22,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:22,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844043180] [2024-06-27 20:47:22,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:22,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:22,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:22,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:22,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:22,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:22,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 485 transitions, 6738 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:22,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:22,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:22,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:23,951 INFO L124 PetriNetUnfolderBase]: 4577/7072 cut-off events. [2024-06-27 20:47:23,951 INFO L125 PetriNetUnfolderBase]: For 705176/705194 co-relation queries the response was YES. [2024-06-27 20:47:24,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59026 conditions, 7072 events. 4577/7072 cut-off events. For 705176/705194 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 41550 event pairs, 1079 based on Foata normal form. 18/7088 useless extension candidates. Maximal degree in co-relation 58851. Up to 6911 conditions per place. [2024-06-27 20:47:24,060 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 449 selfloop transitions, 53 changer transitions 0/505 dead transitions. [2024-06-27 20:47:24,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 505 transitions, 7900 flow [2024-06-27 20:47:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 20:47:24,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-27 20:47:24,061 INFO L175 Difference]: Start difference. First operand has 368 places, 485 transitions, 6738 flow. Second operand 8 states and 121 transitions. [2024-06-27 20:47:24,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 505 transitions, 7900 flow [2024-06-27 20:47:26,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 505 transitions, 7709 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:26,196 INFO L231 Difference]: Finished difference. Result has 372 places, 488 transitions, 6743 flow [2024-06-27 20:47:26,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6743, PETRI_PLACES=372, PETRI_TRANSITIONS=488} [2024-06-27 20:47:26,196 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-27 20:47:26,196 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 488 transitions, 6743 flow [2024-06-27 20:47:26,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:26,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:26,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:26,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:47:26,197 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:26,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:26,197 INFO L85 PathProgramCache]: Analyzing trace with hash -478561950, now seen corresponding path program 9 times [2024-06-27 20:47:26,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:26,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25915603] [2024-06-27 20:47:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:26,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:26,883 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 20:47:26,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:26,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25915603] [2024-06-27 20:47:26,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25915603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:26,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:26,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:26,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346569444] [2024-06-27 20:47:26,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:26,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:26,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:26,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:26,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 488 transitions, 6743 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:26,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:26,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:26,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:28,511 INFO L124 PetriNetUnfolderBase]: 4587/7086 cut-off events. [2024-06-27 20:47:28,511 INFO L125 PetriNetUnfolderBase]: For 709551/709569 co-relation queries the response was YES. [2024-06-27 20:47:28,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58587 conditions, 7086 events. 4587/7086 cut-off events. For 709551/709569 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 41636 event pairs, 1085 based on Foata normal form. 18/7102 useless extension candidates. Maximal degree in co-relation 58410. Up to 6893 conditions per place. [2024-06-27 20:47:28,626 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 441 selfloop transitions, 64 changer transitions 0/508 dead transitions. [2024-06-27 20:47:28,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 508 transitions, 7917 flow [2024-06-27 20:47:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:47:28,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 20:47:28,627 INFO L175 Difference]: Start difference. First operand has 372 places, 488 transitions, 6743 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:47:28,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 508 transitions, 7917 flow [2024-06-27 20:47:31,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 508 transitions, 7749 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:31,129 INFO L231 Difference]: Finished difference. Result has 374 places, 491 transitions, 6799 flow [2024-06-27 20:47:31,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6575, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6799, PETRI_PLACES=374, PETRI_TRANSITIONS=491} [2024-06-27 20:47:31,129 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-27 20:47:31,129 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 491 transitions, 6799 flow [2024-06-27 20:47:31,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:31,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:31,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:31,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:47:31,130 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:31,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2109530098, now seen corresponding path program 10 times [2024-06-27 20:47:31,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:31,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266706258] [2024-06-27 20:47:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:31,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:31,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:31,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266706258] [2024-06-27 20:47:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266706258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:31,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:31,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:31,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935602836] [2024-06-27 20:47:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:31,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:31,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 491 transitions, 6799 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:31,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:31,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:31,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:33,503 INFO L124 PetriNetUnfolderBase]: 4597/7100 cut-off events. [2024-06-27 20:47:33,503 INFO L125 PetriNetUnfolderBase]: For 724037/724055 co-relation queries the response was YES. [2024-06-27 20:47:33,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58874 conditions, 7100 events. 4597/7100 cut-off events. For 724037/724055 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 41726 event pairs, 1111 based on Foata normal form. 18/7116 useless extension candidates. Maximal degree in co-relation 58696. Up to 6975 conditions per place. [2024-06-27 20:47:33,615 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 462 selfloop transitions, 43 changer transitions 0/508 dead transitions. [2024-06-27 20:47:33,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 508 transitions, 8143 flow [2024-06-27 20:47:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-27 20:47:33,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-27 20:47:33,616 INFO L175 Difference]: Start difference. First operand has 374 places, 491 transitions, 6799 flow. Second operand 8 states and 117 transitions. [2024-06-27 20:47:33,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 508 transitions, 8143 flow [2024-06-27 20:47:35,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 508 transitions, 7947 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:35,823 INFO L231 Difference]: Finished difference. Result has 376 places, 494 transitions, 6785 flow [2024-06-27 20:47:35,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6603, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6785, PETRI_PLACES=376, PETRI_TRANSITIONS=494} [2024-06-27 20:47:35,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-27 20:47:35,823 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 494 transitions, 6785 flow [2024-06-27 20:47:35,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:35,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:35,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:35,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:47:35,824 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:35,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1392662902, now seen corresponding path program 10 times [2024-06-27 20:47:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:35,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335472645] [2024-06-27 20:47:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:35,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:36,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:36,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335472645] [2024-06-27 20:47:36,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335472645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:36,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:36,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:36,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167410066] [2024-06-27 20:47:36,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:36,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:36,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:36,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:36,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 494 transitions, 6785 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:36,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:36,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:36,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:38,038 INFO L124 PetriNetUnfolderBase]: 4629/7149 cut-off events. [2024-06-27 20:47:38,038 INFO L125 PetriNetUnfolderBase]: For 753981/753990 co-relation queries the response was YES. [2024-06-27 20:47:38,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59535 conditions, 7149 events. 4629/7149 cut-off events. For 753981/753990 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41965 event pairs, 956 based on Foata normal form. 10/7154 useless extension candidates. Maximal degree in co-relation 59356. Up to 6755 conditions per place. [2024-06-27 20:47:38,145 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 424 selfloop transitions, 93 changer transitions 0/520 dead transitions. [2024-06-27 20:47:38,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 520 transitions, 8519 flow [2024-06-27 20:47:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:47:38,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 20:47:38,146 INFO L175 Difference]: Start difference. First operand has 376 places, 494 transitions, 6785 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:47:38,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 520 transitions, 8519 flow [2024-06-27 20:47:40,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 520 transitions, 8316 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:40,974 INFO L231 Difference]: Finished difference. Result has 379 places, 500 transitions, 6987 flow [2024-06-27 20:47:40,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6582, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6987, PETRI_PLACES=379, PETRI_TRANSITIONS=500} [2024-06-27 20:47:40,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-27 20:47:40,975 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 500 transitions, 6987 flow [2024-06-27 20:47:40,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:40,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:40,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:40,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:47:40,975 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:40,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash -463762766, now seen corresponding path program 11 times [2024-06-27 20:47:40,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:40,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140892739] [2024-06-27 20:47:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140892739] [2024-06-27 20:47:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140892739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:41,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:41,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503923598] [2024-06-27 20:47:41,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:41,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:41,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:41,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 500 transitions, 6987 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:41,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:41,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:41,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:43,347 INFO L124 PetriNetUnfolderBase]: 4639/7159 cut-off events. [2024-06-27 20:47:43,348 INFO L125 PetriNetUnfolderBase]: For 759622/759640 co-relation queries the response was YES. [2024-06-27 20:47:43,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59989 conditions, 7159 events. 4639/7159 cut-off events. For 759622/759640 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42076 event pairs, 1113 based on Foata normal form. 18/7175 useless extension candidates. Maximal degree in co-relation 59808. Up to 7065 conditions per place. [2024-06-27 20:47:43,449 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 478 selfloop transitions, 35 changer transitions 0/516 dead transitions. [2024-06-27 20:47:43,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 516 transitions, 8153 flow [2024-06-27 20:47:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-27 20:47:43,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-27 20:47:43,450 INFO L175 Difference]: Start difference. First operand has 379 places, 500 transitions, 6987 flow. Second operand 8 states and 115 transitions. [2024-06-27 20:47:43,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 516 transitions, 8153 flow [2024-06-27 20:47:46,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 516 transitions, 7736 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:46,136 INFO L231 Difference]: Finished difference. Result has 381 places, 503 transitions, 6734 flow [2024-06-27 20:47:46,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6734, PETRI_PLACES=381, PETRI_TRANSITIONS=503} [2024-06-27 20:47:46,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-27 20:47:46,136 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 503 transitions, 6734 flow [2024-06-27 20:47:46,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:46,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:46,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:46,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:47:46,136 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:46,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1141430439, now seen corresponding path program 2 times [2024-06-27 20:47:46,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:46,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391322836] [2024-06-27 20:47:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:46,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:46,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:46,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391322836] [2024-06-27 20:47:46,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391322836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:46,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:46,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:46,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334681160] [2024-06-27 20:47:46,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:46,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:46,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:46,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:46,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:46,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 503 transitions, 6734 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:46,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:46,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:46,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:48,567 INFO L124 PetriNetUnfolderBase]: 4636/7155 cut-off events. [2024-06-27 20:47:48,567 INFO L125 PetriNetUnfolderBase]: For 761541/761559 co-relation queries the response was YES. [2024-06-27 20:47:48,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59048 conditions, 7155 events. 4636/7155 cut-off events. For 761541/761559 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42069 event pairs, 1132 based on Foata normal form. 17/7170 useless extension candidates. Maximal degree in co-relation 58867. Up to 7075 conditions per place. [2024-06-27 20:47:48,668 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 480 selfloop transitions, 33 changer transitions 0/516 dead transitions. [2024-06-27 20:47:48,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 516 transitions, 7898 flow [2024-06-27 20:47:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-27 20:47:48,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678571428571429 [2024-06-27 20:47:48,669 INFO L175 Difference]: Start difference. First operand has 381 places, 503 transitions, 6734 flow. Second operand 7 states and 103 transitions. [2024-06-27 20:47:48,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 516 transitions, 7898 flow [2024-06-27 20:47:51,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 516 transitions, 7762 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:51,519 INFO L231 Difference]: Finished difference. Result has 382 places, 506 transitions, 6782 flow [2024-06-27 20:47:51,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6598, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6782, PETRI_PLACES=382, PETRI_TRANSITIONS=506} [2024-06-27 20:47:51,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-27 20:47:51,519 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 506 transitions, 6782 flow [2024-06-27 20:47:51,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:51,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:51,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:51,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:47:51,520 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:51,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:51,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1135716519, now seen corresponding path program 3 times [2024-06-27 20:47:51,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:51,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219441779] [2024-06-27 20:47:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:51,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:52,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219441779] [2024-06-27 20:47:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219441779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:52,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:52,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:52,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408468465] [2024-06-27 20:47:52,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:52,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:52,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:52,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:52,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:52,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 506 transitions, 6782 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:52,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:52,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:52,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:53,965 INFO L124 PetriNetUnfolderBase]: 4629/7145 cut-off events. [2024-06-27 20:47:53,965 INFO L125 PetriNetUnfolderBase]: For 771683/771701 co-relation queries the response was YES. [2024-06-27 20:47:54,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59001 conditions, 7145 events. 4629/7145 cut-off events. For 771683/771701 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42039 event pairs, 1116 based on Foata normal form. 17/7160 useless extension candidates. Maximal degree in co-relation 58819. Up to 7036 conditions per place. [2024-06-27 20:47:54,056 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 465 selfloop transitions, 49 changer transitions 0/517 dead transitions. [2024-06-27 20:47:54,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 517 transitions, 7856 flow [2024-06-27 20:47:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-27 20:47:54,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-27 20:47:54,057 INFO L175 Difference]: Start difference. First operand has 382 places, 506 transitions, 6782 flow. Second operand 7 states and 104 transitions. [2024-06-27 20:47:54,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 517 transitions, 7856 flow [2024-06-27 20:47:56,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 517 transitions, 7648 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:56,932 INFO L231 Difference]: Finished difference. Result has 383 places, 506 transitions, 6682 flow [2024-06-27 20:47:56,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6574, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6682, PETRI_PLACES=383, PETRI_TRANSITIONS=506} [2024-06-27 20:47:56,933 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-27 20:47:56,933 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 506 transitions, 6682 flow [2024-06-27 20:47:56,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:56,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:56,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:56,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:47:56,934 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:56,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash 369529418, now seen corresponding path program 11 times [2024-06-27 20:47:56,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:56,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328267871] [2024-06-27 20:47:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:56,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:57,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:57,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328267871] [2024-06-27 20:47:57,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328267871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:57,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:57,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:57,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746091017] [2024-06-27 20:47:57,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:57,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:57,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:57,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:47:57,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 506 transitions, 6682 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:57,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:57,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:47:57,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:59,180 INFO L124 PetriNetUnfolderBase]: 4649/7177 cut-off events. [2024-06-27 20:47:59,180 INFO L125 PetriNetUnfolderBase]: For 786561/786570 co-relation queries the response was YES. [2024-06-27 20:47:59,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59215 conditions, 7177 events. 4649/7177 cut-off events. For 786561/786570 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 42193 event pairs, 970 based on Foata normal form. 10/7182 useless extension candidates. Maximal degree in co-relation 59033. Up to 6895 conditions per place. [2024-06-27 20:47:59,290 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 454 selfloop transitions, 71 changer transitions 0/528 dead transitions. [2024-06-27 20:47:59,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 528 transitions, 8104 flow [2024-06-27 20:47:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:47:59,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 20:47:59,291 INFO L175 Difference]: Start difference. First operand has 383 places, 506 transitions, 6682 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:47:59,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 528 transitions, 8104 flow [2024-06-27 20:48:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 528 transitions, 7998 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:02,425 INFO L231 Difference]: Finished difference. Result has 384 places, 509 transitions, 6813 flow [2024-06-27 20:48:02,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6578, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6813, PETRI_PLACES=384, PETRI_TRANSITIONS=509} [2024-06-27 20:48:02,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-27 20:48:02,426 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 509 transitions, 6813 flow [2024-06-27 20:48:02,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:02,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:02,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:02,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:48:02,426 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:02,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash 369529604, now seen corresponding path program 12 times [2024-06-27 20:48:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:02,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241507337] [2024-06-27 20:48:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:02,999 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 20:48:02,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:02,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241507337] [2024-06-27 20:48:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241507337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:02,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426809923] [2024-06-27 20:48:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:03,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:03,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 509 transitions, 6813 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:03,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:03,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:04,724 INFO L124 PetriNetUnfolderBase]: 4643/7165 cut-off events. [2024-06-27 20:48:04,725 INFO L125 PetriNetUnfolderBase]: For 767964/767982 co-relation queries the response was YES. [2024-06-27 20:48:04,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59049 conditions, 7165 events. 4643/7165 cut-off events. For 767964/767982 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 42147 event pairs, 1125 based on Foata normal form. 18/7181 useless extension candidates. Maximal degree in co-relation 58867. Up to 7091 conditions per place. [2024-06-27 20:48:04,835 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 491 selfloop transitions, 27 changer transitions 0/521 dead transitions. [2024-06-27 20:48:04,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 521 transitions, 7897 flow [2024-06-27 20:48:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-27 20:48:04,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353125 [2024-06-27 20:48:04,836 INFO L175 Difference]: Start difference. First operand has 384 places, 509 transitions, 6813 flow. Second operand 8 states and 113 transitions. [2024-06-27 20:48:04,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 521 transitions, 7897 flow [2024-06-27 20:48:07,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 521 transitions, 7508 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:07,254 INFO L231 Difference]: Finished difference. Result has 385 places, 509 transitions, 6484 flow [2024-06-27 20:48:07,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6484, PETRI_PLACES=385, PETRI_TRANSITIONS=509} [2024-06-27 20:48:07,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-27 20:48:07,254 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 509 transitions, 6484 flow [2024-06-27 20:48:07,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:07,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:07,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:07,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:48:07,255 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:07,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash 369409448, now seen corresponding path program 12 times [2024-06-27 20:48:07,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:07,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88940918] [2024-06-27 20:48:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:07,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:07,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:07,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88940918] [2024-06-27 20:48:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88940918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:07,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:07,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326140290] [2024-06-27 20:48:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:07,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:07,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:07,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:07,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:07,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 509 transitions, 6484 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:07,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:07,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:07,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:09,461 INFO L124 PetriNetUnfolderBase]: 4660/7193 cut-off events. [2024-06-27 20:48:09,461 INFO L125 PetriNetUnfolderBase]: For 784826/784835 co-relation queries the response was YES. [2024-06-27 20:48:09,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58429 conditions, 7193 events. 4660/7193 cut-off events. For 784826/784835 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42283 event pairs, 974 based on Foata normal form. 10/7198 useless extension candidates. Maximal degree in co-relation 58247. Up to 6947 conditions per place. [2024-06-27 20:48:09,573 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 461 selfloop transitions, 68 changer transitions 0/532 dead transitions. [2024-06-27 20:48:09,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 532 transitions, 7714 flow [2024-06-27 20:48:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:48:09,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 20:48:09,574 INFO L175 Difference]: Start difference. First operand has 385 places, 509 transitions, 6484 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:48:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 532 transitions, 7714 flow [2024-06-27 20:48:12,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 532 transitions, 7626 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:12,654 INFO L231 Difference]: Finished difference. Result has 387 places, 516 transitions, 6650 flow [2024-06-27 20:48:12,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6650, PETRI_PLACES=387, PETRI_TRANSITIONS=516} [2024-06-27 20:48:12,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-27 20:48:12,654 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 516 transitions, 6650 flow [2024-06-27 20:48:12,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:12,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:12,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:12,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:48:12,654 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:12,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1569517654, now seen corresponding path program 3 times [2024-06-27 20:48:12,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:12,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890418984] [2024-06-27 20:48:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:12,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:13,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:13,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890418984] [2024-06-27 20:48:13,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890418984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:13,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:13,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:13,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884836500] [2024-06-27 20:48:13,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:13,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:13,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:13,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:13,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:13,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:13,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 516 transitions, 6650 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:13,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:13,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:13,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:15,128 INFO L124 PetriNetUnfolderBase]: 4734/7307 cut-off events. [2024-06-27 20:48:15,128 INFO L125 PetriNetUnfolderBase]: For 861292/861301 co-relation queries the response was YES. [2024-06-27 20:48:15,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61005 conditions, 7307 events. 4734/7307 cut-off events. For 861292/861301 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 43065 event pairs, 974 based on Foata normal form. 14/7316 useless extension candidates. Maximal degree in co-relation 60821. Up to 6957 conditions per place. [2024-06-27 20:48:15,241 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 475 selfloop transitions, 65 changer transitions 0/543 dead transitions. [2024-06-27 20:48:15,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 543 transitions, 8170 flow [2024-06-27 20:48:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:48:15,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:48:15,242 INFO L175 Difference]: Start difference. First operand has 387 places, 516 transitions, 6650 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:48:15,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 543 transitions, 8170 flow [2024-06-27 20:48:18,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 543 transitions, 7986 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 20:48:18,525 INFO L231 Difference]: Finished difference. Result has 391 places, 518 transitions, 6658 flow [2024-06-27 20:48:18,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6466, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6658, PETRI_PLACES=391, PETRI_TRANSITIONS=518} [2024-06-27 20:48:18,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 350 predicate places. [2024-06-27 20:48:18,526 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 518 transitions, 6658 flow [2024-06-27 20:48:18,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:18,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:18,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:18,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:48:18,526 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:18,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1141434004, now seen corresponding path program 4 times [2024-06-27 20:48:18,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:18,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989612650] [2024-06-27 20:48:18,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:18,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:19,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:19,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989612650] [2024-06-27 20:48:19,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989612650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:19,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:19,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:19,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413528174] [2024-06-27 20:48:19,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:19,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:19,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:19,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 518 transitions, 6658 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:19,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:19,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:19,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:21,112 INFO L124 PetriNetUnfolderBase]: 4706/7267 cut-off events. [2024-06-27 20:48:21,112 INFO L125 PetriNetUnfolderBase]: For 838339/838348 co-relation queries the response was YES. [2024-06-27 20:48:21,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59571 conditions, 7267 events. 4706/7267 cut-off events. For 838339/838348 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 42792 event pairs, 976 based on Foata normal form. 18/7280 useless extension candidates. Maximal degree in co-relation 59386. Up to 6983 conditions per place. [2024-06-27 20:48:21,225 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 471 selfloop transitions, 64 changer transitions 0/538 dead transitions. [2024-06-27 20:48:21,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 538 transitions, 7878 flow [2024-06-27 20:48:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:48:21,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 20:48:21,226 INFO L175 Difference]: Start difference. First operand has 391 places, 518 transitions, 6658 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:48:21,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 538 transitions, 7878 flow [2024-06-27 20:48:24,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 538 transitions, 7766 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:48:24,844 INFO L231 Difference]: Finished difference. Result has 395 places, 518 transitions, 6680 flow [2024-06-27 20:48:24,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6680, PETRI_PLACES=395, PETRI_TRANSITIONS=518} [2024-06-27 20:48:24,844 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-27 20:48:24,845 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 518 transitions, 6680 flow [2024-06-27 20:48:24,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:24,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:24,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:24,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:48:24,845 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:24,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:24,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1126688854, now seen corresponding path program 5 times [2024-06-27 20:48:24,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:24,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398369855] [2024-06-27 20:48:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:24,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398369855] [2024-06-27 20:48:25,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398369855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:25,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:25,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542977379] [2024-06-27 20:48:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:25,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:25,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:25,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:25,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 518 transitions, 6680 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:25,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:25,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:25,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:27,335 INFO L124 PetriNetUnfolderBase]: 4688/7241 cut-off events. [2024-06-27 20:48:27,335 INFO L125 PetriNetUnfolderBase]: For 791819/791828 co-relation queries the response was YES. [2024-06-27 20:48:27,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58612 conditions, 7241 events. 4688/7241 cut-off events. For 791819/791828 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 42588 event pairs, 950 based on Foata normal form. 14/7250 useless extension candidates. Maximal degree in co-relation 58425. Up to 6729 conditions per place. [2024-06-27 20:48:27,449 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 467 selfloop transitions, 71 changer transitions 0/541 dead transitions. [2024-06-27 20:48:27,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 541 transitions, 7924 flow [2024-06-27 20:48:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 20:48:27,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 20:48:27,450 INFO L175 Difference]: Start difference. First operand has 395 places, 518 transitions, 6680 flow. Second operand 8 states and 124 transitions. [2024-06-27 20:48:27,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 541 transitions, 7924 flow [2024-06-27 20:48:30,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 541 transitions, 7791 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:30,391 INFO L231 Difference]: Finished difference. Result has 396 places, 518 transitions, 6693 flow [2024-06-27 20:48:30,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6693, PETRI_PLACES=396, PETRI_TRANSITIONS=518} [2024-06-27 20:48:30,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-27 20:48:30,392 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 518 transitions, 6693 flow [2024-06-27 20:48:30,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:30,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:30,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:30,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:48:30,392 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:30,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash -622437600, now seen corresponding path program 1 times [2024-06-27 20:48:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625220299] [2024-06-27 20:48:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:31,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:31,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625220299] [2024-06-27 20:48:31,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625220299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:31,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:31,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416696403] [2024-06-27 20:48:31,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:31,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:31,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:31,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:31,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 518 transitions, 6693 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:31,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:31,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:31,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:33,119 INFO L124 PetriNetUnfolderBase]: 4696/7261 cut-off events. [2024-06-27 20:48:33,119 INFO L125 PetriNetUnfolderBase]: For 778729/778729 co-relation queries the response was YES. [2024-06-27 20:48:33,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58986 conditions, 7261 events. 4696/7261 cut-off events. For 778729/778729 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 43018 event pairs, 2135 based on Foata normal form. 2/7262 useless extension candidates. Maximal degree in co-relation 58798. Up to 7163 conditions per place. [2024-06-27 20:48:33,230 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 506 selfloop transitions, 31 changer transitions 0/540 dead transitions. [2024-06-27 20:48:33,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 540 transitions, 7911 flow [2024-06-27 20:48:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-27 20:48:33,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-27 20:48:33,231 INFO L175 Difference]: Start difference. First operand has 396 places, 518 transitions, 6693 flow. Second operand 9 states and 129 transitions. [2024-06-27 20:48:33,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 540 transitions, 7911 flow [2024-06-27 20:48:36,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 540 transitions, 7674 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:36,745 INFO L231 Difference]: Finished difference. Result has 397 places, 520 transitions, 6581 flow [2024-06-27 20:48:36,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6581, PETRI_PLACES=397, PETRI_TRANSITIONS=520} [2024-06-27 20:48:36,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-27 20:48:36,745 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 520 transitions, 6581 flow [2024-06-27 20:48:36,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:36,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:36,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:36,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:48:36,746 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:36,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash -478345260, now seen corresponding path program 2 times [2024-06-27 20:48:36,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36122375] [2024-06-27 20:48:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:36,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:37,610 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 20:48:37,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:37,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36122375] [2024-06-27 20:48:37,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36122375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:37,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:37,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:37,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598825989] [2024-06-27 20:48:37,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:37,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:37,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:37,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:37,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:37,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 520 transitions, 6581 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:37,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:37,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:37,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:39,402 INFO L124 PetriNetUnfolderBase]: 4704/7273 cut-off events. [2024-06-27 20:48:39,402 INFO L125 PetriNetUnfolderBase]: For 791316/791316 co-relation queries the response was YES. [2024-06-27 20:48:39,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58611 conditions, 7273 events. 4704/7273 cut-off events. For 791316/791316 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 43092 event pairs, 2152 based on Foata normal form. 2/7274 useless extension candidates. Maximal degree in co-relation 58424. Up to 7198 conditions per place. [2024-06-27 20:48:39,516 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 514 selfloop transitions, 22 changer transitions 0/539 dead transitions. [2024-06-27 20:48:39,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 539 transitions, 7789 flow [2024-06-27 20:48:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-27 20:48:39,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-27 20:48:39,517 INFO L175 Difference]: Start difference. First operand has 397 places, 520 transitions, 6581 flow. Second operand 8 states and 117 transitions. [2024-06-27 20:48:39,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 539 transitions, 7789 flow [2024-06-27 20:48:42,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 539 transitions, 7666 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:42,457 INFO L231 Difference]: Finished difference. Result has 399 places, 522 transitions, 6569 flow [2024-06-27 20:48:42,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6458, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6569, PETRI_PLACES=399, PETRI_TRANSITIONS=522} [2024-06-27 20:48:42,458 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-27 20:48:42,458 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 522 transitions, 6569 flow [2024-06-27 20:48:42,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:42,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:42,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:42,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:48:42,458 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:42,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash 40627376, now seen corresponding path program 3 times [2024-06-27 20:48:42,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:42,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939695064] [2024-06-27 20:48:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:43,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:43,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939695064] [2024-06-27 20:48:43,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939695064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:43,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:43,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716748657] [2024-06-27 20:48:43,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:43,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:43,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:43,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:43,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:43,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 522 transitions, 6569 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:43,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:43,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:43,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:45,132 INFO L124 PetriNetUnfolderBase]: 4712/7285 cut-off events. [2024-06-27 20:48:45,133 INFO L125 PetriNetUnfolderBase]: For 806875/806875 co-relation queries the response was YES. [2024-06-27 20:48:45,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58829 conditions, 7285 events. 4712/7285 cut-off events. For 806875/806875 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 43180 event pairs, 2145 based on Foata normal form. 2/7286 useless extension candidates. Maximal degree in co-relation 58641. Up to 7210 conditions per place. [2024-06-27 20:48:45,254 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 517 selfloop transitions, 21 changer transitions 0/541 dead transitions. [2024-06-27 20:48:45,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 541 transitions, 7775 flow [2024-06-27 20:48:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:45,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-27 20:48:45,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-27 20:48:45,255 INFO L175 Difference]: Start difference. First operand has 399 places, 522 transitions, 6569 flow. Second operand 8 states and 116 transitions. [2024-06-27 20:48:45,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 541 transitions, 7775 flow [2024-06-27 20:48:48,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 541 transitions, 7680 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:48,859 INFO L231 Difference]: Finished difference. Result has 401 places, 524 transitions, 6587 flow [2024-06-27 20:48:48,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6587, PETRI_PLACES=401, PETRI_TRANSITIONS=524} [2024-06-27 20:48:48,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-27 20:48:48,859 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 524 transitions, 6587 flow [2024-06-27 20:48:48,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:48,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:48,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:48,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:48:48,860 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:48,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1067283540, now seen corresponding path program 4 times [2024-06-27 20:48:48,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:48,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967762681] [2024-06-27 20:48:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:48,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:49,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:49,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967762681] [2024-06-27 20:48:49,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967762681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:49,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585594407] [2024-06-27 20:48:49,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:49,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:49,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 524 transitions, 6587 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:49,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:49,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:49,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:51,470 INFO L124 PetriNetUnfolderBase]: 4720/7297 cut-off events. [2024-06-27 20:48:51,470 INFO L125 PetriNetUnfolderBase]: For 822476/822476 co-relation queries the response was YES. [2024-06-27 20:48:51,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59138 conditions, 7297 events. 4720/7297 cut-off events. For 822476/822476 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 43335 event pairs, 2173 based on Foata normal form. 2/7298 useless extension candidates. Maximal degree in co-relation 58949. Up to 7226 conditions per place. [2024-06-27 20:48:51,609 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 511 selfloop transitions, 25 changer transitions 0/539 dead transitions. [2024-06-27 20:48:51,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 539 transitions, 7779 flow [2024-06-27 20:48:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-27 20:48:51,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-27 20:48:51,610 INFO L175 Difference]: Start difference. First operand has 401 places, 524 transitions, 6587 flow. Second operand 8 states and 112 transitions. [2024-06-27 20:48:51,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 539 transitions, 7779 flow [2024-06-27 20:48:54,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 539 transitions, 7682 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:54,839 INFO L231 Difference]: Finished difference. Result has 403 places, 526 transitions, 6616 flow [2024-06-27 20:48:54,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6616, PETRI_PLACES=403, PETRI_TRANSITIONS=526} [2024-06-27 20:48:54,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-27 20:48:54,840 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 526 transitions, 6616 flow [2024-06-27 20:48:54,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:54,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:54,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:54,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:48:54,840 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:54,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:54,840 INFO L85 PathProgramCache]: Analyzing trace with hash -463516688, now seen corresponding path program 1 times [2024-06-27 20:48:54,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:54,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026810486] [2024-06-27 20:48:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:55,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:55,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026810486] [2024-06-27 20:48:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026810486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:55,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:55,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741755726] [2024-06-27 20:48:55,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:55,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:48:55,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 526 transitions, 6616 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:55,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:55,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:48:55,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:57,390 INFO L124 PetriNetUnfolderBase]: 4714/7289 cut-off events. [2024-06-27 20:48:57,390 INFO L125 PetriNetUnfolderBase]: For 826527/826527 co-relation queries the response was YES. [2024-06-27 20:48:57,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59017 conditions, 7289 events. 4714/7289 cut-off events. For 826527/826527 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 43258 event pairs, 2166 based on Foata normal form. 2/7290 useless extension candidates. Maximal degree in co-relation 58827. Up to 7219 conditions per place. [2024-06-27 20:48:57,505 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 515 selfloop transitions, 21 changer transitions 0/539 dead transitions. [2024-06-27 20:48:57,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 539 transitions, 7752 flow [2024-06-27 20:48:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-27 20:48:57,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33611111111111114 [2024-06-27 20:48:57,506 INFO L175 Difference]: Start difference. First operand has 403 places, 526 transitions, 6616 flow. Second operand 9 states and 121 transitions. [2024-06-27 20:48:57,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 539 transitions, 7752 flow [2024-06-27 20:49:01,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 539 transitions, 7622 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:01,383 INFO L231 Difference]: Finished difference. Result has 406 places, 526 transitions, 6536 flow [2024-06-27 20:49:01,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6486, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6536, PETRI_PLACES=406, PETRI_TRANSITIONS=526} [2024-06-27 20:49:01,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 365 predicate places. [2024-06-27 20:49:01,383 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 526 transitions, 6536 flow [2024-06-27 20:49:01,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:01,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:01,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:01,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:49:01,384 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:01,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1126504156, now seen corresponding path program 5 times [2024-06-27 20:49:01,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:01,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603026670] [2024-06-27 20:49:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:01,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:02,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:02,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603026670] [2024-06-27 20:49:02,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603026670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:02,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:02,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:02,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139415179] [2024-06-27 20:49:02,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:02,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:02,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:02,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:02,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 526 transitions, 6536 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:02,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:02,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:02,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:03,969 INFO L124 PetriNetUnfolderBase]: 4722/7301 cut-off events. [2024-06-27 20:49:03,969 INFO L125 PetriNetUnfolderBase]: For 840805/840805 co-relation queries the response was YES. [2024-06-27 20:49:04,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59168 conditions, 7301 events. 4722/7301 cut-off events. For 840805/840805 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 43328 event pairs, 2168 based on Foata normal form. 2/7302 useless extension candidates. Maximal degree in co-relation 58977. Up to 7236 conditions per place. [2024-06-27 20:49:04,086 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 521 selfloop transitions, 17 changer transitions 0/541 dead transitions. [2024-06-27 20:49:04,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 541 transitions, 7716 flow [2024-06-27 20:49:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-27 20:49:04,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-27 20:49:04,087 INFO L175 Difference]: Start difference. First operand has 406 places, 526 transitions, 6536 flow. Second operand 8 states and 110 transitions. [2024-06-27 20:49:04,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 541 transitions, 7716 flow [2024-06-27 20:49:08,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 541 transitions, 7636 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:49:08,178 INFO L231 Difference]: Finished difference. Result has 405 places, 528 transitions, 6569 flow [2024-06-27 20:49:08,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6569, PETRI_PLACES=405, PETRI_TRANSITIONS=528} [2024-06-27 20:49:08,178 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-27 20:49:08,178 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 528 transitions, 6569 flow [2024-06-27 20:49:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:08,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:08,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:08,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:49:08,179 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:08,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:08,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1392201436, now seen corresponding path program 6 times [2024-06-27 20:49:08,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:08,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832638591] [2024-06-27 20:49:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:09,033 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 20:49:09,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:09,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832638591] [2024-06-27 20:49:09,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832638591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:09,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:09,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:09,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450239290] [2024-06-27 20:49:09,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:09,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:09,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:09,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 528 transitions, 6569 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:09,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:09,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:09,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:10,819 INFO L124 PetriNetUnfolderBase]: 4730/7313 cut-off events. [2024-06-27 20:49:10,820 INFO L125 PetriNetUnfolderBase]: For 857711/857711 co-relation queries the response was YES. [2024-06-27 20:49:10,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59501 conditions, 7313 events. 4730/7313 cut-off events. For 857711/857711 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43445 event pairs, 2174 based on Foata normal form. 2/7314 useless extension candidates. Maximal degree in co-relation 59311. Up to 7253 conditions per place. [2024-06-27 20:49:10,935 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 524 selfloop transitions, 16 changer transitions 0/543 dead transitions. [2024-06-27 20:49:10,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 543 transitions, 7767 flow [2024-06-27 20:49:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-27 20:49:10,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-27 20:49:10,936 INFO L175 Difference]: Start difference. First operand has 405 places, 528 transitions, 6569 flow. Second operand 8 states and 110 transitions. [2024-06-27 20:49:10,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 543 transitions, 7767 flow [2024-06-27 20:49:14,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 543 transitions, 7670 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:14,775 INFO L231 Difference]: Finished difference. Result has 407 places, 530 transitions, 6587 flow [2024-06-27 20:49:14,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6472, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6587, PETRI_PLACES=407, PETRI_TRANSITIONS=530} [2024-06-27 20:49:14,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-27 20:49:14,775 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 530 transitions, 6587 flow [2024-06-27 20:49:14,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:14,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:14,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:14,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:49:14,776 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:14,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1135708583, now seen corresponding path program 1 times [2024-06-27 20:49:14,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:14,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312156499] [2024-06-27 20:49:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:14,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:15,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:15,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312156499] [2024-06-27 20:49:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312156499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:15,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:15,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87341428] [2024-06-27 20:49:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:15,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:15,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:15,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:15,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 530 transitions, 6587 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:15,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:15,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:15,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:17,338 INFO L124 PetriNetUnfolderBase]: 4724/7305 cut-off events. [2024-06-27 20:49:17,338 INFO L125 PetriNetUnfolderBase]: For 861004/861004 co-relation queries the response was YES. [2024-06-27 20:49:17,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59322 conditions, 7305 events. 4724/7305 cut-off events. For 861004/861004 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43351 event pairs, 2173 based on Foata normal form. 2/7306 useless extension candidates. Maximal degree in co-relation 59131. Up to 7220 conditions per place. [2024-06-27 20:49:17,449 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 513 selfloop transitions, 31 changer transitions 0/547 dead transitions. [2024-06-27 20:49:17,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 547 transitions, 7849 flow [2024-06-27 20:49:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-27 20:49:17,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35625 [2024-06-27 20:49:17,449 INFO L175 Difference]: Start difference. First operand has 407 places, 530 transitions, 6587 flow. Second operand 8 states and 114 transitions. [2024-06-27 20:49:17,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 547 transitions, 7849 flow [2024-06-27 20:49:21,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 547 transitions, 7750 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:21,744 INFO L231 Difference]: Finished difference. Result has 409 places, 533 transitions, 6652 flow [2024-06-27 20:49:21,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6652, PETRI_PLACES=409, PETRI_TRANSITIONS=533} [2024-06-27 20:49:21,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-27 20:49:21,744 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 533 transitions, 6652 flow [2024-06-27 20:49:21,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:21,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:21,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:21,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:49:21,745 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:21,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1135700926, now seen corresponding path program 7 times [2024-06-27 20:49:21,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:21,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183209967] [2024-06-27 20:49:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:21,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:22,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:22,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183209967] [2024-06-27 20:49:22,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183209967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:22,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:22,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:22,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769808670] [2024-06-27 20:49:22,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:22,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:22,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:22,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:22,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:22,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 533 transitions, 6652 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:22,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:22,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:22,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:24,387 INFO L124 PetriNetUnfolderBase]: 4719/7298 cut-off events. [2024-06-27 20:49:24,387 INFO L125 PetriNetUnfolderBase]: For 864631/864631 co-relation queries the response was YES. [2024-06-27 20:49:24,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59519 conditions, 7298 events. 4719/7298 cut-off events. For 864631/864631 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43281 event pairs, 2170 based on Foata normal form. 2/7299 useless extension candidates. Maximal degree in co-relation 59327. Up to 7218 conditions per place. [2024-06-27 20:49:24,498 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 520 selfloop transitions, 25 changer transitions 0/548 dead transitions. [2024-06-27 20:49:24,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 548 transitions, 7866 flow [2024-06-27 20:49:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-27 20:49:24,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346875 [2024-06-27 20:49:24,499 INFO L175 Difference]: Start difference. First operand has 409 places, 533 transitions, 6652 flow. Second operand 8 states and 111 transitions. [2024-06-27 20:49:24,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 548 transitions, 7866 flow [2024-06-27 20:49:28,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 548 transitions, 7734 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:28,649 INFO L231 Difference]: Finished difference. Result has 410 places, 535 transitions, 6662 flow [2024-06-27 20:49:28,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6520, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6662, PETRI_PLACES=410, PETRI_TRANSITIONS=535} [2024-06-27 20:49:28,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-27 20:49:28,650 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 535 transitions, 6662 flow [2024-06-27 20:49:28,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:28,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:28,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:28,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:49:28,650 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:28,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash 935723751, now seen corresponding path program 1 times [2024-06-27 20:49:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:28,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706083155] [2024-06-27 20:49:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:28,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:29,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:29,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706083155] [2024-06-27 20:49:29,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706083155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:29,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:29,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:49:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473510647] [2024-06-27 20:49:29,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:49:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:49:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:49:29,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:29,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 535 transitions, 6662 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:29,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:29,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:29,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:31,490 INFO L124 PetriNetUnfolderBase]: 4914/7564 cut-off events. [2024-06-27 20:49:31,490 INFO L125 PetriNetUnfolderBase]: For 878311/878319 co-relation queries the response was YES. [2024-06-27 20:49:31,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61659 conditions, 7564 events. 4914/7564 cut-off events. For 878311/878319 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 44817 event pairs, 1000 based on Foata normal form. 10/7573 useless extension candidates. Maximal degree in co-relation 61467. Up to 7186 conditions per place. [2024-06-27 20:49:31,608 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 515 selfloop transitions, 113 changer transitions 0/631 dead transitions. [2024-06-27 20:49:31,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 631 transitions, 9098 flow [2024-06-27 20:49:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 20:49:31,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 20:49:31,609 INFO L175 Difference]: Start difference. First operand has 410 places, 535 transitions, 6662 flow. Second operand 12 states and 189 transitions. [2024-06-27 20:49:31,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 631 transitions, 9098 flow [2024-06-27 20:49:34,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 631 transitions, 8974 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:34,557 INFO L231 Difference]: Finished difference. Result has 420 places, 586 transitions, 7666 flow [2024-06-27 20:49:34,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6540, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7666, PETRI_PLACES=420, PETRI_TRANSITIONS=586} [2024-06-27 20:49:34,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-27 20:49:34,558 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 586 transitions, 7666 flow [2024-06-27 20:49:34,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:34,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:34,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:34,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:49:34,558 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:34,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:34,559 INFO L85 PathProgramCache]: Analyzing trace with hash 463101603, now seen corresponding path program 2 times [2024-06-27 20:49:34,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:34,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664378625] [2024-06-27 20:49:34,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:34,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:35,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:35,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664378625] [2024-06-27 20:49:35,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664378625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:35,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:35,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246965610] [2024-06-27 20:49:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:35,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:35,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:35,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 586 transitions, 7666 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:35,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:35,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:35,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:37,540 INFO L124 PetriNetUnfolderBase]: 5068/7788 cut-off events. [2024-06-27 20:49:37,540 INFO L125 PetriNetUnfolderBase]: For 909135/909139 co-relation queries the response was YES. [2024-06-27 20:49:37,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64715 conditions, 7788 events. 5068/7788 cut-off events. For 909135/909139 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 46404 event pairs, 1420 based on Foata normal form. 6/7793 useless extension candidates. Maximal degree in co-relation 64518. Up to 7369 conditions per place. [2024-06-27 20:49:37,670 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 516 selfloop transitions, 146 changer transitions 0/665 dead transitions. [2024-06-27 20:49:37,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 665 transitions, 10118 flow [2024-06-27 20:49:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-27 20:49:37,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 20:49:37,671 INFO L175 Difference]: Start difference. First operand has 420 places, 586 transitions, 7666 flow. Second operand 12 states and 186 transitions. [2024-06-27 20:49:37,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 665 transitions, 10118 flow [2024-06-27 20:49:41,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 665 transitions, 9788 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:41,082 INFO L231 Difference]: Finished difference. Result has 429 places, 628 transitions, 8547 flow [2024-06-27 20:49:41,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8547, PETRI_PLACES=429, PETRI_TRANSITIONS=628} [2024-06-27 20:49:41,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 20:49:41,083 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 628 transitions, 8547 flow [2024-06-27 20:49:41,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:41,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:41,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:41,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:49:41,083 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:41,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1356348003, now seen corresponding path program 3 times [2024-06-27 20:49:41,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:41,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274555302] [2024-06-27 20:49:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:41,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:41,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274555302] [2024-06-27 20:49:41,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274555302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:41,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:41,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827531013] [2024-06-27 20:49:41,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:41,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:41,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:41,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 628 transitions, 8547 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:41,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:41,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:41,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:43,932 INFO L124 PetriNetUnfolderBase]: 5056/7770 cut-off events. [2024-06-27 20:49:43,933 INFO L125 PetriNetUnfolderBase]: For 915703/915707 co-relation queries the response was YES. [2024-06-27 20:49:44,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64979 conditions, 7770 events. 5056/7770 cut-off events. For 915703/915707 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 46216 event pairs, 1512 based on Foata normal form. 8/7777 useless extension candidates. Maximal degree in co-relation 64779. Up to 7462 conditions per place. [2024-06-27 20:49:44,058 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 536 selfloop transitions, 119 changer transitions 0/658 dead transitions. [2024-06-27 20:49:44,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 658 transitions, 9976 flow [2024-06-27 20:49:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-27 20:49:44,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-27 20:49:44,059 INFO L175 Difference]: Start difference. First operand has 429 places, 628 transitions, 8547 flow. Second operand 11 states and 168 transitions. [2024-06-27 20:49:44,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 658 transitions, 9976 flow [2024-06-27 20:49:47,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 658 transitions, 9639 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:47,692 INFO L231 Difference]: Finished difference. Result has 434 places, 628 transitions, 8466 flow [2024-06-27 20:49:47,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8210, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8466, PETRI_PLACES=434, PETRI_TRANSITIONS=628} [2024-06-27 20:49:47,693 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-27 20:49:47,693 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 628 transitions, 8466 flow [2024-06-27 20:49:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:47,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:47,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:47,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:49:47,693 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:47,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:47,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1463299438, now seen corresponding path program 1 times [2024-06-27 20:49:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:47,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265092082] [2024-06-27 20:49:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:48,375 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 20:49:48,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:48,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265092082] [2024-06-27 20:49:48,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265092082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:48,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:48,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:49:48,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57809622] [2024-06-27 20:49:48,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:49:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:49:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:49:48,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:48,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 628 transitions, 8466 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:48,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:48,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:48,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:50,688 INFO L124 PetriNetUnfolderBase]: 5108/7841 cut-off events. [2024-06-27 20:49:50,689 INFO L125 PetriNetUnfolderBase]: For 956890/956898 co-relation queries the response was YES. [2024-06-27 20:49:50,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66245 conditions, 7841 events. 5108/7841 cut-off events. For 956890/956898 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 46663 event pairs, 1128 based on Foata normal form. 12/7852 useless extension candidates. Maximal degree in co-relation 66044. Up to 7358 conditions per place. [2024-06-27 20:49:50,816 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 537 selfloop transitions, 137 changer transitions 0/677 dead transitions. [2024-06-27 20:49:50,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 677 transitions, 10441 flow [2024-06-27 20:49:50,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:49:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:49:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 200 transitions. [2024-06-27 20:49:50,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-27 20:49:50,817 INFO L175 Difference]: Start difference. First operand has 434 places, 628 transitions, 8466 flow. Second operand 13 states and 200 transitions. [2024-06-27 20:49:50,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 677 transitions, 10441 flow [2024-06-27 20:49:54,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 677 transitions, 10211 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:49:54,878 INFO L231 Difference]: Finished difference. Result has 438 places, 635 transitions, 8732 flow [2024-06-27 20:49:54,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8732, PETRI_PLACES=438, PETRI_TRANSITIONS=635} [2024-06-27 20:49:54,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-27 20:49:54,879 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 635 transitions, 8732 flow [2024-06-27 20:49:54,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:54,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:54,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:54,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:49:54,879 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:54,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash -701746118, now seen corresponding path program 2 times [2024-06-27 20:49:54,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:54,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905526324] [2024-06-27 20:49:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:54,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:55,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:55,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905526324] [2024-06-27 20:49:55,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905526324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:55,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:55,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:55,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112113851] [2024-06-27 20:49:55,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:55,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:55,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:55,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:55,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:49:55,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 635 transitions, 8732 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:55,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:55,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:49:55,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:57,818 INFO L124 PetriNetUnfolderBase]: 5128/7868 cut-off events. [2024-06-27 20:49:57,818 INFO L125 PetriNetUnfolderBase]: For 979349/979357 co-relation queries the response was YES. [2024-06-27 20:49:57,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67273 conditions, 7868 events. 5128/7868 cut-off events. For 979349/979357 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 46822 event pairs, 1141 based on Foata normal form. 12/7879 useless extension candidates. Maximal degree in co-relation 67071. Up to 7472 conditions per place. [2024-06-27 20:49:57,954 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 542 selfloop transitions, 131 changer transitions 0/676 dead transitions. [2024-06-27 20:49:57,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 676 transitions, 10368 flow [2024-06-27 20:49:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:49:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:49:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 195 transitions. [2024-06-27 20:49:57,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:49:57,955 INFO L175 Difference]: Start difference. First operand has 438 places, 635 transitions, 8732 flow. Second operand 13 states and 195 transitions. [2024-06-27 20:49:57,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 676 transitions, 10368 flow [2024-06-27 20:50:02,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 676 transitions, 10063 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-27 20:50:02,133 INFO L231 Difference]: Finished difference. Result has 446 places, 638 transitions, 8810 flow [2024-06-27 20:50:02,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8473, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8810, PETRI_PLACES=446, PETRI_TRANSITIONS=638} [2024-06-27 20:50:02,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2024-06-27 20:50:02,133 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 638 transitions, 8810 flow [2024-06-27 20:50:02,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:02,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:02,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:50:02,134 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:02,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2138475060, now seen corresponding path program 3 times [2024-06-27 20:50:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:02,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058029658] [2024-06-27 20:50:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:02,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:02,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058029658] [2024-06-27 20:50:02,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058029658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:02,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:02,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603510630] [2024-06-27 20:50:02,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:02,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:02,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:02,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:02,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:50:02,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 638 transitions, 8810 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:02,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:02,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:50:02,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:05,011 INFO L124 PetriNetUnfolderBase]: 5116/7852 cut-off events. [2024-06-27 20:50:05,011 INFO L125 PetriNetUnfolderBase]: For 966149/966157 co-relation queries the response was YES. [2024-06-27 20:50:05,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66603 conditions, 7852 events. 5116/7852 cut-off events. For 966149/966157 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 46744 event pairs, 1230 based on Foata normal form. 12/7863 useless extension candidates. Maximal degree in co-relation 66399. Up to 7530 conditions per place. [2024-06-27 20:50:05,159 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 551 selfloop transitions, 116 changer transitions 0/670 dead transitions. [2024-06-27 20:50:05,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 670 transitions, 10286 flow [2024-06-27 20:50:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2024-06-27 20:50:05,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-27 20:50:05,161 INFO L175 Difference]: Start difference. First operand has 446 places, 638 transitions, 8810 flow. Second operand 12 states and 178 transitions. [2024-06-27 20:50:05,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 670 transitions, 10286 flow [2024-06-27 20:50:09,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 670 transitions, 9941 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-27 20:50:09,691 INFO L231 Difference]: Finished difference. Result has 448 places, 638 transitions, 8704 flow [2024-06-27 20:50:09,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8704, PETRI_PLACES=448, PETRI_TRANSITIONS=638} [2024-06-27 20:50:09,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-27 20:50:09,692 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 638 transitions, 8704 flow [2024-06-27 20:50:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:09,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:09,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:50:09,693 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:09,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2130194123, now seen corresponding path program 1 times [2024-06-27 20:50:09,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:09,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882900955] [2024-06-27 20:50:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:09,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:10,312 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 20:50:10,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:10,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882900955] [2024-06-27 20:50:10,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882900955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:10,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:10,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392392262] [2024-06-27 20:50:10,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:10,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:10,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:50:10,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 638 transitions, 8704 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:10,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:10,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:50:10,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:12,562 INFO L124 PetriNetUnfolderBase]: 5131/7873 cut-off events. [2024-06-27 20:50:12,562 INFO L125 PetriNetUnfolderBase]: For 969854/969862 co-relation queries the response was YES. [2024-06-27 20:50:12,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66702 conditions, 7873 events. 5131/7873 cut-off events. For 969854/969862 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 46845 event pairs, 1233 based on Foata normal form. 10/7882 useless extension candidates. Maximal degree in co-relation 66497. Up to 7570 conditions per place. [2024-06-27 20:50:12,702 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 553 selfloop transitions, 117 changer transitions 0/673 dead transitions. [2024-06-27 20:50:12,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 673 transitions, 10298 flow [2024-06-27 20:50:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-27 20:50:12,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37727272727272726 [2024-06-27 20:50:12,703 INFO L175 Difference]: Start difference. First operand has 448 places, 638 transitions, 8704 flow. Second operand 11 states and 166 transitions. [2024-06-27 20:50:12,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 673 transitions, 10298 flow [2024-06-27 20:50:16,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 673 transitions, 10024 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 20:50:16,866 INFO L231 Difference]: Finished difference. Result has 449 places, 644 transitions, 8835 flow [2024-06-27 20:50:16,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8434, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8835, PETRI_PLACES=449, PETRI_TRANSITIONS=644} [2024-06-27 20:50:16,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-27 20:50:16,867 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 644 transitions, 8835 flow [2024-06-27 20:50:16,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:16,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:16,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:16,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:50:16,867 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:16,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:16,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1996537763, now seen corresponding path program 4 times [2024-06-27 20:50:16,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:16,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052303841] [2024-06-27 20:50:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:17,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:17,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052303841] [2024-06-27 20:50:17,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052303841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:17,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:17,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838044061] [2024-06-27 20:50:17,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:17,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:17,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:17,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:50:17,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 644 transitions, 8835 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:17,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:17,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:50:17,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:19,868 INFO L124 PetriNetUnfolderBase]: 5156/7911 cut-off events. [2024-06-27 20:50:19,868 INFO L125 PetriNetUnfolderBase]: For 1009907/1009915 co-relation queries the response was YES. [2024-06-27 20:50:19,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67742 conditions, 7911 events. 5156/7911 cut-off events. For 1009907/1009915 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 47099 event pairs, 1543 based on Foata normal form. 13/7922 useless extension candidates. Maximal degree in co-relation 67535. Up to 7536 conditions per place. [2024-06-27 20:50:20,007 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 546 selfloop transitions, 123 changer transitions 0/672 dead transitions. [2024-06-27 20:50:20,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 672 transitions, 10481 flow [2024-06-27 20:50:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:50:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:50:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 20:50:20,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-27 20:50:20,008 INFO L175 Difference]: Start difference. First operand has 449 places, 644 transitions, 8835 flow. Second operand 9 states and 136 transitions. [2024-06-27 20:50:20,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 672 transitions, 10481 flow [2024-06-27 20:50:24,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 672 transitions, 10197 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 20:50:24,201 INFO L231 Difference]: Finished difference. Result has 450 places, 650 transitions, 9041 flow [2024-06-27 20:50:24,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8551, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9041, PETRI_PLACES=450, PETRI_TRANSITIONS=650} [2024-06-27 20:50:24,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-27 20:50:24,201 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 650 transitions, 9041 flow [2024-06-27 20:50:24,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:24,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:24,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:24,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:50:24,202 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:24,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1502564264, now seen corresponding path program 4 times [2024-06-27 20:50:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:24,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749237621] [2024-06-27 20:50:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:24,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:24,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749237621] [2024-06-27 20:50:24,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749237621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:24,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:24,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:24,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417948422] [2024-06-27 20:50:24,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:24,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:24,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:24,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:50:24,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 650 transitions, 9041 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:24,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:24,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:50:24,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:27,212 INFO L124 PetriNetUnfolderBase]: 5208/7983 cut-off events. [2024-06-27 20:50:27,212 INFO L125 PetriNetUnfolderBase]: For 1050259/1050271 co-relation queries the response was YES. [2024-06-27 20:50:27,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69390 conditions, 7983 events. 5208/7983 cut-off events. For 1050259/1050271 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 47523 event pairs, 1089 based on Foata normal form. 16/7995 useless extension candidates. Maximal degree in co-relation 69182. Up to 7203 conditions per place. [2024-06-27 20:50:27,564 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 506 selfloop transitions, 178 changer transitions 0/687 dead transitions. [2024-06-27 20:50:27,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 687 transitions, 11027 flow [2024-06-27 20:50:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:50:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:50:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 20:50:27,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-27 20:50:27,566 INFO L175 Difference]: Start difference. First operand has 450 places, 650 transitions, 9041 flow. Second operand 10 states and 159 transitions. [2024-06-27 20:50:27,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 687 transitions, 11027 flow [2024-06-27 20:50:31,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 687 transitions, 10655 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-06-27 20:50:31,242 INFO L231 Difference]: Finished difference. Result has 451 places, 656 transitions, 9265 flow [2024-06-27 20:50:31,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8675, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9265, PETRI_PLACES=451, PETRI_TRANSITIONS=656} [2024-06-27 20:50:31,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-27 20:50:31,243 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 656 transitions, 9265 flow [2024-06-27 20:50:31,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:31,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:31,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:31,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:50:31,243 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:31,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1502414534, now seen corresponding path program 5 times [2024-06-27 20:50:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:31,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7101426] [2024-06-27 20:50:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:31,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:31,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7101426] [2024-06-27 20:50:31,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7101426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:31,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:31,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:31,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207247653] [2024-06-27 20:50:31,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:31,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:31,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:31,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:31,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:32,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:50:32,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 656 transitions, 9265 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:32,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:32,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:50:32,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:34,466 INFO L124 PetriNetUnfolderBase]: 5228/8011 cut-off events. [2024-06-27 20:50:34,466 INFO L125 PetriNetUnfolderBase]: For 1024641/1024653 co-relation queries the response was YES. [2024-06-27 20:50:34,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69877 conditions, 8011 events. 5228/8011 cut-off events. For 1024641/1024653 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 47703 event pairs, 1094 based on Foata normal form. 16/8023 useless extension candidates. Maximal degree in co-relation 69670. Up to 7433 conditions per place. [2024-06-27 20:50:34,595 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 520 selfloop transitions, 163 changer transitions 0/686 dead transitions. [2024-06-27 20:50:34,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 686 transitions, 10901 flow [2024-06-27 20:50:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:50:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:50:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 20:50:34,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385 [2024-06-27 20:50:34,597 INFO L175 Difference]: Start difference. First operand has 451 places, 656 transitions, 9265 flow. Second operand 10 states and 154 transitions. [2024-06-27 20:50:34,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 686 transitions, 10901 flow [2024-06-27 20:50:38,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 686 transitions, 10499 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-27 20:50:38,793 INFO L231 Difference]: Finished difference. Result has 454 places, 659 transitions, 9321 flow [2024-06-27 20:50:38,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8909, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9321, PETRI_PLACES=454, PETRI_TRANSITIONS=659} [2024-06-27 20:50:38,793 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-27 20:50:38,793 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 659 transitions, 9321 flow [2024-06-27 20:50:38,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:38,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:38,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:38,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:50:38,794 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:38,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1295761094, now seen corresponding path program 6 times [2024-06-27 20:50:38,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:38,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699781309] [2024-06-27 20:50:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:38,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:39,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:39,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699781309] [2024-06-27 20:50:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699781309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:39,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:39,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:39,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608682637] [2024-06-27 20:50:39,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:39,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:39,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:39,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:50:39,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 659 transitions, 9321 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:39,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:39,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:50:39,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:41,735 INFO L124 PetriNetUnfolderBase]: 5248/8038 cut-off events. [2024-06-27 20:50:41,735 INFO L125 PetriNetUnfolderBase]: For 1016038/1016050 co-relation queries the response was YES. [2024-06-27 20:50:41,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69712 conditions, 8038 events. 5248/8038 cut-off events. For 1016038/1016050 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47828 event pairs, 1269 based on Foata normal form. 16/8050 useless extension candidates. Maximal degree in co-relation 69504. Up to 7649 conditions per place. [2024-06-27 20:50:41,872 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 554 selfloop transitions, 127 changer transitions 0/684 dead transitions. [2024-06-27 20:50:41,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 684 transitions, 10873 flow [2024-06-27 20:50:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:50:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:50:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-27 20:50:41,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2024-06-27 20:50:41,873 INFO L175 Difference]: Start difference. First operand has 454 places, 659 transitions, 9321 flow. Second operand 10 states and 148 transitions. [2024-06-27 20:50:41,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 684 transitions, 10873 flow [2024-06-27 20:50:46,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 684 transitions, 10500 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 20:50:46,036 INFO L231 Difference]: Finished difference. Result has 455 places, 662 transitions, 9294 flow [2024-06-27 20:50:46,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8948, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9294, PETRI_PLACES=455, PETRI_TRANSITIONS=662} [2024-06-27 20:50:46,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-27 20:50:46,037 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 662 transitions, 9294 flow [2024-06-27 20:50:46,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:46,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:46,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:46,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:50:46,037 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:46,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:46,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2076824386, now seen corresponding path program 7 times [2024-06-27 20:50:46,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:46,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434501676] [2024-06-27 20:50:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:46,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:46,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:46,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434501676] [2024-06-27 20:50:46,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434501676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:46,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:46,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:46,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793279851] [2024-06-27 20:50:46,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:46,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:46,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:46,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:50:46,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 662 transitions, 9294 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:46,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:46,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:50:46,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:49,062 INFO L124 PetriNetUnfolderBase]: 5322/8146 cut-off events. [2024-06-27 20:50:49,062 INFO L125 PetriNetUnfolderBase]: For 1046486/1046494 co-relation queries the response was YES. [2024-06-27 20:50:49,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71072 conditions, 8146 events. 5322/8146 cut-off events. For 1046486/1046494 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 48541 event pairs, 1570 based on Foata normal form. 12/8155 useless extension candidates. Maximal degree in co-relation 70864. Up to 7882 conditions per place. [2024-06-27 20:50:49,206 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 624 selfloop transitions, 71 changer transitions 0/698 dead transitions. [2024-06-27 20:50:49,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 698 transitions, 11316 flow [2024-06-27 20:50:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:50:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:50:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:50:49,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 20:50:49,207 INFO L175 Difference]: Start difference. First operand has 455 places, 662 transitions, 9294 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:50:49,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 698 transitions, 11316 flow [2024-06-27 20:50:53,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 698 transitions, 11007 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-27 20:50:53,643 INFO L231 Difference]: Finished difference. Result has 456 places, 671 transitions, 9401 flow [2024-06-27 20:50:53,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8987, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9401, PETRI_PLACES=456, PETRI_TRANSITIONS=671} [2024-06-27 20:50:53,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-27 20:50:53,644 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 671 transitions, 9401 flow [2024-06-27 20:50:53,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:53,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:53,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:53,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:50:53,645 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:53,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash -917411795, now seen corresponding path program 1 times [2024-06-27 20:50:53,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:53,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902001965] [2024-06-27 20:50:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:53,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:54,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:54,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902001965] [2024-06-27 20:50:54,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902001965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:54,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:54,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:54,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827246207] [2024-06-27 20:50:54,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:54,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:54,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:54,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:50:54,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 671 transitions, 9401 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:54,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:54,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:50:54,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:56,770 INFO L124 PetriNetUnfolderBase]: 5477/8357 cut-off events. [2024-06-27 20:50:56,770 INFO L125 PetriNetUnfolderBase]: For 1075273/1075277 co-relation queries the response was YES. [2024-06-27 20:50:56,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73685 conditions, 8357 events. 5477/8357 cut-off events. For 1075273/1075277 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 49829 event pairs, 1615 based on Foata normal form. 8/8364 useless extension candidates. Maximal degree in co-relation 73476. Up to 8161 conditions per place. [2024-06-27 20:50:56,919 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 683 selfloop transitions, 55 changer transitions 0/741 dead transitions. [2024-06-27 20:50:56,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 741 transitions, 11907 flow [2024-06-27 20:50:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-06-27 20:50:56,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3770833333333333 [2024-06-27 20:50:56,920 INFO L175 Difference]: Start difference. First operand has 456 places, 671 transitions, 9401 flow. Second operand 12 states and 181 transitions. [2024-06-27 20:50:56,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 741 transitions, 11907 flow [2024-06-27 20:51:01,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 741 transitions, 11652 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-27 20:51:01,349 INFO L231 Difference]: Finished difference. Result has 466 places, 701 transitions, 9871 flow [2024-06-27 20:51:01,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9166, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9871, PETRI_PLACES=466, PETRI_TRANSITIONS=701} [2024-06-27 20:51:01,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 425 predicate places. [2024-06-27 20:51:01,350 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 701 transitions, 9871 flow [2024-06-27 20:51:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:01,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:01,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:51:01,350 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:01,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:01,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1544635372, now seen corresponding path program 8 times [2024-06-27 20:51:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:01,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671303097] [2024-06-27 20:51:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:02,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:02,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671303097] [2024-06-27 20:51:02,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671303097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:02,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:02,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81856711] [2024-06-27 20:51:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:02,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:51:02,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 701 transitions, 9871 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:02,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:02,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:51:02,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:04,484 INFO L124 PetriNetUnfolderBase]: 5497/8391 cut-off events. [2024-06-27 20:51:04,485 INFO L125 PetriNetUnfolderBase]: For 1095561/1095569 co-relation queries the response was YES. [2024-06-27 20:51:04,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74399 conditions, 8391 events. 5497/8391 cut-off events. For 1095561/1095569 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 50029 event pairs, 1562 based on Foata normal form. 12/8401 useless extension candidates. Maximal degree in co-relation 74185. Up to 8065 conditions per place. [2024-06-27 20:51:04,644 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 640 selfloop transitions, 86 changer transitions 0/729 dead transitions. [2024-06-27 20:51:04,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 729 transitions, 11776 flow [2024-06-27 20:51:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:51:04,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 20:51:04,645 INFO L175 Difference]: Start difference. First operand has 466 places, 701 transitions, 9871 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:51:04,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 729 transitions, 11776 flow [2024-06-27 20:51:09,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 729 transitions, 11558 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-27 20:51:09,615 INFO L231 Difference]: Finished difference. Result has 470 places, 704 transitions, 9897 flow [2024-06-27 20:51:09,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9653, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9897, PETRI_PLACES=470, PETRI_TRANSITIONS=704} [2024-06-27 20:51:09,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-27 20:51:09,616 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 704 transitions, 9897 flow [2024-06-27 20:51:09,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:09,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:09,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:09,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:51:09,616 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:09,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:09,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1269867236, now seen corresponding path program 9 times [2024-06-27 20:51:09,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:09,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365546905] [2024-06-27 20:51:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:09,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:10,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:10,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365546905] [2024-06-27 20:51:10,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365546905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:10,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:10,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:10,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647303461] [2024-06-27 20:51:10,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:10,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:10,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:10,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:51:10,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 704 transitions, 9897 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:10,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:10,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:51:10,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:13,212 INFO L124 PetriNetUnfolderBase]: 5571/8491 cut-off events. [2024-06-27 20:51:13,212 INFO L125 PetriNetUnfolderBase]: For 1143274/1143278 co-relation queries the response was YES. [2024-06-27 20:51:13,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76057 conditions, 8491 events. 5571/8491 cut-off events. For 1143274/1143278 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 50489 event pairs, 898 based on Foata normal form. 8/8494 useless extension candidates. Maximal degree in co-relation 75842. Up to 7548 conditions per place. [2024-06-27 20:51:13,356 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 516 selfloop transitions, 225 changer transitions 0/744 dead transitions. [2024-06-27 20:51:13,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 744 transitions, 12291 flow [2024-06-27 20:51:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:51:13,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 20:51:13,357 INFO L175 Difference]: Start difference. First operand has 470 places, 704 transitions, 9897 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:51:13,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 744 transitions, 12291 flow [2024-06-27 20:51:18,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 744 transitions, 12107 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:18,019 INFO L231 Difference]: Finished difference. Result has 474 places, 713 transitions, 10451 flow [2024-06-27 20:51:18,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9713, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10451, PETRI_PLACES=474, PETRI_TRANSITIONS=713} [2024-06-27 20:51:18,020 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-27 20:51:18,020 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 713 transitions, 10451 flow [2024-06-27 20:51:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:18,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:18,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:51:18,020 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:18,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:18,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2071611736, now seen corresponding path program 10 times [2024-06-27 20:51:18,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:18,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665896549] [2024-06-27 20:51:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:18,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:18,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:18,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665896549] [2024-06-27 20:51:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665896549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:18,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:18,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037077716] [2024-06-27 20:51:18,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:18,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:18,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:51:18,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 713 transitions, 10451 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:18,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:18,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:51:18,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:21,611 INFO L124 PetriNetUnfolderBase]: 5591/8519 cut-off events. [2024-06-27 20:51:21,611 INFO L125 PetriNetUnfolderBase]: For 1171821/1171825 co-relation queries the response was YES. [2024-06-27 20:51:21,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77592 conditions, 8519 events. 5591/8519 cut-off events. For 1171821/1171825 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 50678 event pairs, 894 based on Foata normal form. 8/8522 useless extension candidates. Maximal degree in co-relation 77375. Up to 7666 conditions per place. [2024-06-27 20:51:21,773 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 521 selfloop transitions, 219 changer transitions 0/743 dead transitions. [2024-06-27 20:51:21,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 743 transitions, 12468 flow [2024-06-27 20:51:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:51:21,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 20:51:21,775 INFO L175 Difference]: Start difference. First operand has 474 places, 713 transitions, 10451 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:51:21,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 743 transitions, 12468 flow [2024-06-27 20:51:26,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 743 transitions, 11957 flow, removed 117 selfloop flow, removed 5 redundant places. [2024-06-27 20:51:26,646 INFO L231 Difference]: Finished difference. Result has 478 places, 716 transitions, 10515 flow [2024-06-27 20:51:26,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10002, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10515, PETRI_PLACES=478, PETRI_TRANSITIONS=716} [2024-06-27 20:51:26,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 437 predicate places. [2024-06-27 20:51:26,647 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 716 transitions, 10515 flow [2024-06-27 20:51:26,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:26,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:26,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:26,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:51:26,648 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:26,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2081801467, now seen corresponding path program 1 times [2024-06-27 20:51:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:26,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776304590] [2024-06-27 20:51:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:27,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:27,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776304590] [2024-06-27 20:51:27,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776304590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:27,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:27,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:27,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628090739] [2024-06-27 20:51:27,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:27,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:27,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:27,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:27,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:27,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:51:27,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 716 transitions, 10515 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:27,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:27,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:51:27,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:30,254 INFO L124 PetriNetUnfolderBase]: 5599/8536 cut-off events. [2024-06-27 20:51:30,254 INFO L125 PetriNetUnfolderBase]: For 1169919/1169927 co-relation queries the response was YES. [2024-06-27 20:51:30,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77870 conditions, 8536 events. 5599/8536 cut-off events. For 1169919/1169927 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 50968 event pairs, 1617 based on Foata normal form. 10/8543 useless extension candidates. Maximal degree in co-relation 77651. Up to 8383 conditions per place. [2024-06-27 20:51:30,399 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 677 selfloop transitions, 54 changer transitions 0/734 dead transitions. [2024-06-27 20:51:30,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 734 transitions, 12127 flow [2024-06-27 20:51:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:51:30,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:51:30,400 INFO L175 Difference]: Start difference. First operand has 478 places, 716 transitions, 10515 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:51:30,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 734 transitions, 12127 flow [2024-06-27 20:51:35,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 734 transitions, 11645 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:51:35,213 INFO L231 Difference]: Finished difference. Result has 479 places, 718 transitions, 10226 flow [2024-06-27 20:51:35,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10033, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10226, PETRI_PLACES=479, PETRI_TRANSITIONS=718} [2024-06-27 20:51:35,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 438 predicate places. [2024-06-27 20:51:35,214 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 718 transitions, 10226 flow [2024-06-27 20:51:35,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:35,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:35,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:35,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:51:35,214 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:35,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:35,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2081794523, now seen corresponding path program 2 times [2024-06-27 20:51:35,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:35,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433109537] [2024-06-27 20:51:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:35,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:35,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:35,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433109537] [2024-06-27 20:51:35,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433109537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:35,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:35,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207641791] [2024-06-27 20:51:35,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:35,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:35,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:35,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:35,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:51:35,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 718 transitions, 10226 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:35,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:35,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:51:35,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:38,857 INFO L124 PetriNetUnfolderBase]: 5639/8592 cut-off events. [2024-06-27 20:51:38,857 INFO L125 PetriNetUnfolderBase]: For 1226199/1226207 co-relation queries the response was YES. [2024-06-27 20:51:38,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78128 conditions, 8592 events. 5639/8592 cut-off events. For 1226199/1226207 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 51262 event pairs, 1619 based on Foata normal form. 16/8605 useless extension candidates. Maximal degree in co-relation 77908. Up to 8381 conditions per place. [2024-06-27 20:51:38,996 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 673 selfloop transitions, 67 changer transitions 0/743 dead transitions. [2024-06-27 20:51:38,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 743 transitions, 12037 flow [2024-06-27 20:51:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 20:51:38,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:51:38,997 INFO L175 Difference]: Start difference. First operand has 479 places, 718 transitions, 10226 flow. Second operand 9 states and 135 transitions. [2024-06-27 20:51:38,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 743 transitions, 12037 flow [2024-06-27 20:51:44,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 743 transitions, 11870 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:44,077 INFO L231 Difference]: Finished difference. Result has 482 places, 724 transitions, 10409 flow [2024-06-27 20:51:44,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10059, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10409, PETRI_PLACES=482, PETRI_TRANSITIONS=724} [2024-06-27 20:51:44,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-27 20:51:44,077 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 724 transitions, 10409 flow [2024-06-27 20:51:44,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:44,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:44,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:44,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:51:44,078 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:44,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash -912775962, now seen corresponding path program 11 times [2024-06-27 20:51:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:44,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173287413] [2024-06-27 20:51:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:44,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:44,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173287413] [2024-06-27 20:51:44,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173287413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:44,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:44,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:44,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687156436] [2024-06-27 20:51:44,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:44,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:44,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:44,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:44,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:44,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:51:44,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 724 transitions, 10409 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:44,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:44,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:51:44,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:47,841 INFO L124 PetriNetUnfolderBase]: 5659/8615 cut-off events. [2024-06-27 20:51:47,842 INFO L125 PetriNetUnfolderBase]: For 1221785/1221789 co-relation queries the response was YES. [2024-06-27 20:51:47,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79021 conditions, 8615 events. 5659/8615 cut-off events. For 1221785/1221789 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51252 event pairs, 882 based on Foata normal form. 8/8618 useless extension candidates. Maximal degree in co-relation 78800. Up to 7762 conditions per place. [2024-06-27 20:51:47,983 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 522 selfloop transitions, 227 changer transitions 0/752 dead transitions. [2024-06-27 20:51:47,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 752 transitions, 12624 flow [2024-06-27 20:51:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:51:47,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-27 20:51:47,984 INFO L175 Difference]: Start difference. First operand has 482 places, 724 transitions, 10409 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:51:47,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 752 transitions, 12624 flow [2024-06-27 20:51:53,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 752 transitions, 12335 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:53,701 INFO L231 Difference]: Finished difference. Result has 483 places, 727 transitions, 10659 flow [2024-06-27 20:51:53,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10124, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10659, PETRI_PLACES=483, PETRI_TRANSITIONS=727} [2024-06-27 20:51:53,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 442 predicate places. [2024-06-27 20:51:53,702 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 727 transitions, 10659 flow [2024-06-27 20:51:53,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:53,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:53,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:53,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:51:53,702 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:53,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2081794306, now seen corresponding path program 12 times [2024-06-27 20:51:53,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:53,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015984184] [2024-06-27 20:51:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:53,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:54,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015984184] [2024-06-27 20:51:54,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015984184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:54,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:54,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387090058] [2024-06-27 20:51:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:54,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:51:54,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 727 transitions, 10659 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:54,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:54,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:51:54,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:57,172 INFO L124 PetriNetUnfolderBase]: 5679/8648 cut-off events. [2024-06-27 20:51:57,172 INFO L125 PetriNetUnfolderBase]: For 1224328/1224336 co-relation queries the response was YES. [2024-06-27 20:51:57,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79525 conditions, 8648 events. 5679/8648 cut-off events. For 1224328/1224336 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 51641 event pairs, 1623 based on Foata normal form. 12/8657 useless extension candidates. Maximal degree in co-relation 79304. Up to 8465 conditions per place. [2024-06-27 20:51:57,318 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 685 selfloop transitions, 61 changer transitions 0/749 dead transitions. [2024-06-27 20:51:57,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 749 transitions, 12343 flow [2024-06-27 20:51:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 20:51:57,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-27 20:51:57,319 INFO L175 Difference]: Start difference. First operand has 483 places, 727 transitions, 10659 flow. Second operand 9 states and 134 transitions. [2024-06-27 20:51:57,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 749 transitions, 12343 flow [2024-06-27 20:52:03,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 749 transitions, 11839 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:03,281 INFO L231 Difference]: Finished difference. Result has 485 places, 730 transitions, 10358 flow [2024-06-27 20:52:03,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10155, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10358, PETRI_PLACES=485, PETRI_TRANSITIONS=730} [2024-06-27 20:52:03,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 444 predicate places. [2024-06-27 20:52:03,282 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 730 transitions, 10358 flow [2024-06-27 20:52:03,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:03,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:03,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:03,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:52:03,283 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:03,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:03,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1498132667, now seen corresponding path program 2 times [2024-06-27 20:52:03,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:03,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847802542] [2024-06-27 20:52:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:03,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:04,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:04,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847802542] [2024-06-27 20:52:04,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847802542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:04,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:04,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495564171] [2024-06-27 20:52:04,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:04,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:04,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:04,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:52:04,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 730 transitions, 10358 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:04,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:04,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:52:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:07,003 INFO L124 PetriNetUnfolderBase]: 5687/8655 cut-off events. [2024-06-27 20:52:07,003 INFO L125 PetriNetUnfolderBase]: For 1225008/1225016 co-relation queries the response was YES. [2024-06-27 20:52:07,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79073 conditions, 8655 events. 5687/8655 cut-off events. For 1225008/1225016 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 51617 event pairs, 1691 based on Foata normal form. 10/8662 useless extension candidates. Maximal degree in co-relation 78851. Up to 8555 conditions per place. [2024-06-27 20:52:07,163 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 704 selfloop transitions, 36 changer transitions 0/743 dead transitions. [2024-06-27 20:52:07,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 743 transitions, 11962 flow [2024-06-27 20:52:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-27 20:52:07,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678571428571429 [2024-06-27 20:52:07,164 INFO L175 Difference]: Start difference. First operand has 485 places, 730 transitions, 10358 flow. Second operand 7 states and 103 transitions. [2024-06-27 20:52:07,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 743 transitions, 11962 flow [2024-06-27 20:52:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 743 transitions, 11795 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:13,042 INFO L231 Difference]: Finished difference. Result has 485 places, 732 transitions, 10354 flow [2024-06-27 20:52:13,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10191, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10354, PETRI_PLACES=485, PETRI_TRANSITIONS=732} [2024-06-27 20:52:13,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 444 predicate places. [2024-06-27 20:52:13,043 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 732 transitions, 10354 flow [2024-06-27 20:52:13,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:13,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:13,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:13,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:52:13,043 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:13,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash 973895112, now seen corresponding path program 13 times [2024-06-27 20:52:13,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:13,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079411227] [2024-06-27 20:52:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:13,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079411227] [2024-06-27 20:52:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079411227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:13,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436924965] [2024-06-27 20:52:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:13,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:52:13,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 732 transitions, 10354 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:13,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:13,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:52:13,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:16,470 INFO L124 PetriNetUnfolderBase]: 5675/8639 cut-off events. [2024-06-27 20:52:16,470 INFO L125 PetriNetUnfolderBase]: For 1227321/1227325 co-relation queries the response was YES. [2024-06-27 20:52:16,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78480 conditions, 8639 events. 5675/8639 cut-off events. For 1227321/1227325 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 51417 event pairs, 1127 based on Foata normal form. 8/8642 useless extension candidates. Maximal degree in co-relation 78257. Up to 8131 conditions per place. [2024-06-27 20:52:16,775 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 599 selfloop transitions, 148 changer transitions 0/750 dead transitions. [2024-06-27 20:52:16,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 750 transitions, 12216 flow [2024-06-27 20:52:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:52:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:52:16,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:52:16,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 20:52:16,776 INFO L175 Difference]: Start difference. First operand has 485 places, 732 transitions, 10354 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:52:16,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 750 transitions, 12216 flow [2024-06-27 20:52:22,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 750 transitions, 12035 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-27 20:52:22,064 INFO L231 Difference]: Finished difference. Result has 488 places, 732 transitions, 10475 flow [2024-06-27 20:52:22,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10173, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10475, PETRI_PLACES=488, PETRI_TRANSITIONS=732} [2024-06-27 20:52:22,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-27 20:52:22,065 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 732 transitions, 10475 flow [2024-06-27 20:52:22,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:22,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:22,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:22,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:52:22,065 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:22,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1506703547, now seen corresponding path program 3 times [2024-06-27 20:52:22,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:22,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471599598] [2024-06-27 20:52:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:22,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:22,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471599598] [2024-06-27 20:52:22,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471599598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:22,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:22,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922659206] [2024-06-27 20:52:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:22,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:22,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:22,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:22,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:22,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:52:22,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 732 transitions, 10475 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:22,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:22,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:52:22,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:25,570 INFO L124 PetriNetUnfolderBase]: 5683/8651 cut-off events. [2024-06-27 20:52:25,570 INFO L125 PetriNetUnfolderBase]: For 1232884/1232892 co-relation queries the response was YES. [2024-06-27 20:52:25,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78968 conditions, 8651 events. 5683/8651 cut-off events. For 1232884/1232892 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 51614 event pairs, 1679 based on Foata normal form. 10/8658 useless extension candidates. Maximal degree in co-relation 78744. Up to 8544 conditions per place. [2024-06-27 20:52:25,714 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 705 selfloop transitions, 37 changer transitions 0/745 dead transitions. [2024-06-27 20:52:25,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 745 transitions, 12071 flow [2024-06-27 20:52:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-27 20:52:25,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678571428571429 [2024-06-27 20:52:25,715 INFO L175 Difference]: Start difference. First operand has 488 places, 732 transitions, 10475 flow. Second operand 7 states and 103 transitions. [2024-06-27 20:52:25,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 745 transitions, 12071 flow [2024-06-27 20:52:31,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 745 transitions, 11763 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:52:31,107 INFO L231 Difference]: Finished difference. Result has 489 places, 734 transitions, 10335 flow [2024-06-27 20:52:31,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10167, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10335, PETRI_PLACES=489, PETRI_TRANSITIONS=734} [2024-06-27 20:52:31,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-27 20:52:31,108 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 734 transitions, 10335 flow [2024-06-27 20:52:31,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:31,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:31,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:31,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:52:31,108 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:31,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash -740280275, now seen corresponding path program 3 times [2024-06-27 20:52:31,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:31,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943337453] [2024-06-27 20:52:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:31,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:31,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:31,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943337453] [2024-06-27 20:52:31,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943337453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:31,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:31,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:31,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280595213] [2024-06-27 20:52:31,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:31,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:31,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:31,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:31,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:32,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:52:32,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 734 transitions, 10335 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:32,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:32,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:52:32,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:34,693 INFO L124 PetriNetUnfolderBase]: 5687/8657 cut-off events. [2024-06-27 20:52:34,693 INFO L125 PetriNetUnfolderBase]: For 1253390/1253398 co-relation queries the response was YES. [2024-06-27 20:52:34,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78679 conditions, 8657 events. 5687/8657 cut-off events. For 1253390/1253398 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 51682 event pairs, 1670 based on Foata normal form. 12/8666 useless extension candidates. Maximal degree in co-relation 78454. Up to 8523 conditions per place. [2024-06-27 20:52:34,991 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 701 selfloop transitions, 48 changer transitions 0/752 dead transitions. [2024-06-27 20:52:34,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 752 transitions, 12109 flow [2024-06-27 20:52:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:52:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:52:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-27 20:52:34,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-27 20:52:34,992 INFO L175 Difference]: Start difference. First operand has 489 places, 734 transitions, 10335 flow. Second operand 8 states and 117 transitions. [2024-06-27 20:52:34,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 752 transitions, 12109 flow [2024-06-27 20:52:40,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 752 transitions, 11965 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:52:40,269 INFO L231 Difference]: Finished difference. Result has 492 places, 739 transitions, 10503 flow [2024-06-27 20:52:40,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10191, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10503, PETRI_PLACES=492, PETRI_TRANSITIONS=739} [2024-06-27 20:52:40,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-27 20:52:40,269 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 739 transitions, 10503 flow [2024-06-27 20:52:40,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:40,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:40,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:40,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:52:40,270 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:40,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1494667983, now seen corresponding path program 2 times [2024-06-27 20:52:40,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:40,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917728931] [2024-06-27 20:52:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:40,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:40,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:40,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917728931] [2024-06-27 20:52:40,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917728931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:40,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:40,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:40,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322793416] [2024-06-27 20:52:40,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:40,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:40,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:40,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:40,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:40,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:52:40,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 739 transitions, 10503 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:40,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:40,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:52:40,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:43,659 INFO L124 PetriNetUnfolderBase]: 5672/8637 cut-off events. [2024-06-27 20:52:43,659 INFO L125 PetriNetUnfolderBase]: For 1236162/1236166 co-relation queries the response was YES. [2024-06-27 20:52:43,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78148 conditions, 8637 events. 5672/8637 cut-off events. For 1236162/1236166 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 51428 event pairs, 1150 based on Foata normal form. 9/8641 useless extension candidates. Maximal degree in co-relation 77922. Up to 8302 conditions per place. [2024-06-27 20:52:43,798 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 647 selfloop transitions, 104 changer transitions 0/754 dead transitions. [2024-06-27 20:52:43,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 754 transitions, 12099 flow [2024-06-27 20:52:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 20:52:43,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-27 20:52:43,799 INFO L175 Difference]: Start difference. First operand has 492 places, 739 transitions, 10503 flow. Second operand 7 states and 109 transitions. [2024-06-27 20:52:43,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 754 transitions, 12099 flow [2024-06-27 20:52:49,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 754 transitions, 11755 flow, removed 129 selfloop flow, removed 6 redundant places. [2024-06-27 20:52:49,803 INFO L231 Difference]: Finished difference. Result has 493 places, 739 transitions, 10387 flow [2024-06-27 20:52:49,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10159, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10387, PETRI_PLACES=493, PETRI_TRANSITIONS=739} [2024-06-27 20:52:49,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-27 20:52:49,803 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 739 transitions, 10387 flow [2024-06-27 20:52:49,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:49,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:49,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:52:49,804 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:49,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1506406629, now seen corresponding path program 1 times [2024-06-27 20:52:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:49,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230350217] [2024-06-27 20:52:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:50,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:50,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230350217] [2024-06-27 20:52:50,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230350217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:50,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:50,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:50,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164170385] [2024-06-27 20:52:50,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:50,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:50,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:50,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:50,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:52:50,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 739 transitions, 10387 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:50,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:50,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:52:50,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:53,396 INFO L124 PetriNetUnfolderBase]: 5677/8644 cut-off events. [2024-06-27 20:52:53,396 INFO L125 PetriNetUnfolderBase]: For 1224611/1224619 co-relation queries the response was YES. [2024-06-27 20:52:53,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78177 conditions, 8644 events. 5677/8644 cut-off events. For 1224611/1224619 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 51620 event pairs, 1675 based on Foata normal form. 9/8650 useless extension candidates. Maximal degree in co-relation 77950. Up to 8511 conditions per place. [2024-06-27 20:52:53,697 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 692 selfloop transitions, 58 changer transitions 0/753 dead transitions. [2024-06-27 20:52:53,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 753 transitions, 12097 flow [2024-06-27 20:52:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-27 20:52:53,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:52:53,698 INFO L175 Difference]: Start difference. First operand has 493 places, 739 transitions, 10387 flow. Second operand 7 states and 105 transitions. [2024-06-27 20:52:53,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 753 transitions, 12097 flow [2024-06-27 20:52:59,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 753 transitions, 11774 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:59,748 INFO L231 Difference]: Finished difference. Result has 493 places, 742 transitions, 10355 flow [2024-06-27 20:52:59,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10064, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10355, PETRI_PLACES=493, PETRI_TRANSITIONS=742} [2024-06-27 20:52:59,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-27 20:52:59,749 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 742 transitions, 10355 flow [2024-06-27 20:52:59,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:59,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:59,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:59,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:52:59,749 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:59,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash -105608296, now seen corresponding path program 14 times [2024-06-27 20:52:59,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971682105] [2024-06-27 20:52:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:00,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:00,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971682105] [2024-06-27 20:53:00,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971682105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:00,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:00,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:00,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071895824] [2024-06-27 20:53:00,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:00,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:00,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:00,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:00,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:53:00,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 742 transitions, 10355 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:00,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:00,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:53:00,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:02,983 INFO L124 PetriNetUnfolderBase]: 5665/8628 cut-off events. [2024-06-27 20:53:02,983 INFO L125 PetriNetUnfolderBase]: For 1213829/1213833 co-relation queries the response was YES. [2024-06-27 20:53:03,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77456 conditions, 8628 events. 5665/8628 cut-off events. For 1213829/1213833 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 51416 event pairs, 1163 based on Foata normal form. 8/8631 useless extension candidates. Maximal degree in co-relation 77229. Up to 8292 conditions per place. [2024-06-27 20:53:03,297 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 650 selfloop transitions, 104 changer transitions 0/757 dead transitions. [2024-06-27 20:53:03,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 757 transitions, 11957 flow [2024-06-27 20:53:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 20:53:03,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-27 20:53:03,299 INFO L175 Difference]: Start difference. First operand has 493 places, 742 transitions, 10355 flow. Second operand 8 states and 121 transitions. [2024-06-27 20:53:03,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 757 transitions, 11957 flow