./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix045_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix045_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix045_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix045_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:31:47,729 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:31:47,796 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:31:47,801 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:31:47,801 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:31:47,829 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:31:47,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:31:47,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:31:47,830 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:31:47,833 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:31:47,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:31:47,834 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:31:47,835 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:31:47,836 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:31:47,836 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:31:47,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:31:47,837 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:31:47,837 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:31:47,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:31:47,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:31:47,838 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:31:47,839 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:31:47,839 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:31:47,839 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:31:47,840 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:31:47,840 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:31:47,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:31:47,840 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:31:47,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:31:47,841 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:31:47,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:31:47,842 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:31:47,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:31:47,842 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:31:47,843 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:31:47,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:31:47,843 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:31:47,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:31:47,843 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:31:47,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:31:47,844 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:31:47,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:31:47,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:31:47,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:31:48,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:31:48,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:31:48,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:31:48,086 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:31:48,087 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:31:48,088 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix045_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 20:31:48,277 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:31:48,278 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:31:48,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix045_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:31:49,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:31:49,465 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:31:49,466 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix045_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:31:49,478 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1c1b22a3/ceb641fff0554e00a49a41817bf1b7e9/FLAG9b68580d8 [2024-06-27 20:31:49,488 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1c1b22a3/ceb641fff0554e00a49a41817bf1b7e9 [2024-06-27 20:31:49,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:31:49,491 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:31:49,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:31:49,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:31:49,496 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:31:49,496 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:31:48" (1/2) ... [2024-06-27 20:31:49,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790ff09 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:31:49, skipping insertion in model container [2024-06-27 20:31:49,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:31:48" (1/2) ... [2024-06-27 20:31:49,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3936bd07 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:31:49, skipping insertion in model container [2024-06-27 20:31:49,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:31:49" (2/2) ... [2024-06-27 20:31:49,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790ff09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:49, skipping insertion in model container [2024-06-27 20:31:49,501 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:31:49" (2/2) ... [2024-06-27 20:31:49,501 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:31:49,565 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:31:49,566 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((! multithreaded || a$r_buff1_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 20:31:49,566 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((! multithreaded || a$r_buff1_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 20:31:49,566 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || a$r_buff1_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 20:31:49,566 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:31:49,567 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-27 20:31:49,605 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:31:49,930 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:31:49,939 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:31:50,052 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:31:50,087 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:31:50,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50 WrapperNode [2024-06-27 20:31:50,088 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:31:50,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:31:50,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:31:50,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:31:50,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,153 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-27 20:31:50,161 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:31:50,161 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:31:50,162 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:31:50,162 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:31:50,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,183 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,202 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 20:31:50,210 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,210 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,218 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,241 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:31:50,245 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:31:50,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:31:50,245 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:31:50,246 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (1/1) ... [2024-06-27 20:31:50,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:31:50,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:31:50,269 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 20:31:50,290 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 20:31:50,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:31:50,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:31:50,305 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:31:50,306 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:31:50,306 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:31:50,306 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:31:50,306 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:31:50,306 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:31:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:31:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:31:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:31:50,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:31:50,309 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 20:31:50,454 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:31:50,455 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:31:50,732 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:31:50,733 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:31:50,865 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:31:50,865 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:31:50,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:31:50 BoogieIcfgContainer [2024-06-27 20:31:50,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:31:50,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:31:50,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:31:50,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:31:50,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:31:48" (1/4) ... [2024-06-27 20:31:50,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf355a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:31:50, skipping insertion in model container [2024-06-27 20:31:50,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:31:49" (2/4) ... [2024-06-27 20:31:50,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf355a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:31:50, skipping insertion in model container [2024-06-27 20:31:50,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:31:50" (3/4) ... [2024-06-27 20:31:50,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf355a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:31:50, skipping insertion in model container [2024-06-27 20:31:50,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:31:50" (4/4) ... [2024-06-27 20:31:50,872 INFO L112 eAbstractionObserver]: Analyzing ICFG mix045_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:31:50,885 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:31:50,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:31:50,885 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:31:50,936 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:31:50,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:31:50,992 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:31:50,992 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:31:50,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 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. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:31:50,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:31:50,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:31:51,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:31:51,017 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;@71c16b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:31:51,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:31:51,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:31:51,023 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:31:51,023 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:31:51,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:51,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:31:51,024 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 20:31:51,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash 375457951, now seen corresponding path program 1 times [2024-06-27 20:31:51,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:51,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010399031] [2024-06-27 20:31:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:51,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:51,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:51,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010399031] [2024-06-27 20:31:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010399031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:51,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:51,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:31:51,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241093605] [2024-06-27 20:31:51,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:51,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:31:51,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:31:51,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:31:51,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:31:51,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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 20:31:51,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:51,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:31:51,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:52,304 INFO L124 PetriNetUnfolderBase]: 1911/2909 cut-off events. [2024-06-27 20:31:52,304 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 20:31:52,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5833 conditions, 2909 events. 1911/2909 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13861 event pairs, 1379 based on Foata normal form. 1/2833 useless extension candidates. Maximal degree in co-relation 5821. Up to 2825 conditions per place. [2024-06-27 20:31:52,323 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 20:31:52,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-27 20:31:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:31:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:31:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-27 20:31:52,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-27 20:31:52,334 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 74 transitions. [2024-06-27 20:31:52,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-27 20:31:52,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:31:52,339 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:31:52,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 20:31:52,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:31:52,343 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:31:52,343 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 20:31:52,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:52,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:52,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:31:52,344 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 20:31:52,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:52,345 INFO L85 PathProgramCache]: Analyzing trace with hash 37881534, now seen corresponding path program 1 times [2024-06-27 20:31:52,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:52,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748969528] [2024-06-27 20:31:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:52,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748969528] [2024-06-27 20:31:52,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748969528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:52,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:52,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:31:52,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119530051] [2024-06-27 20:31:52,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:52,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:31:52,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:31:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:31:52,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:31:52,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:52,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:52,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:31:52,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:53,279 INFO L124 PetriNetUnfolderBase]: 1905/2900 cut-off events. [2024-06-27 20:31:53,280 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2024-06-27 20:31:53,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 2900 events. 1905/2900 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13853 event pairs, 1212 based on Foata normal form. 3/2866 useless extension candidates. Maximal degree in co-relation 6509. Up to 2801 conditions per place. [2024-06-27 20:31:53,291 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 20:31:53,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 244 flow [2024-06-27 20:31:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:31:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:31:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-27 20:31:53,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-27 20:31:53,293 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 95 transitions. [2024-06-27 20:31:53,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 244 flow [2024-06-27 20:31:53,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:31:53,295 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:31:53,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 20:31:53,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:31:53,296 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:31:53,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:53,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:53,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:53,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:31:53,297 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 20:31:53,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:53,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1174328974, now seen corresponding path program 1 times [2024-06-27 20:31:53,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:53,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051680709] [2024-06-27 20:31:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:53,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:53,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:53,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051680709] [2024-06-27 20:31:53,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051680709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:53,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:53,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:31:53,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097091713] [2024-06-27 20:31:53,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:53,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:31:53,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:53,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:31:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:31:53,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:31:53,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:53,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:53,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:31:53,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:54,147 INFO L124 PetriNetUnfolderBase]: 1913/2918 cut-off events. [2024-06-27 20:31:54,147 INFO L125 PetriNetUnfolderBase]: For 1479/1479 co-relation queries the response was YES. [2024-06-27 20:31:54,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7248 conditions, 2918 events. 1913/2918 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13971 event pairs, 951 based on Foata normal form. 5/2891 useless extension candidates. Maximal degree in co-relation 7234. Up to 2747 conditions per place. [2024-06-27 20:31:54,160 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-27 20:31:54,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 398 flow [2024-06-27 20:31:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:31:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:31:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 20:31:54,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-27 20:31:54,162 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 124 transitions. [2024-06-27 20:31:54,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 398 flow [2024-06-27 20:31:54,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:31:54,165 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 20:31:54,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 20:31:54,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:31:54,165 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 20:31:54,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:54,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:54,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:54,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:31:54,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:54,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2111977869, now seen corresponding path program 1 times [2024-06-27 20:31:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:54,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635428385] [2024-06-27 20:31:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:54,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:54,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:54,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635428385] [2024-06-27 20:31:54,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635428385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:54,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:54,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:31:54,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867055199] [2024-06-27 20:31:54,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:54,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:31:54,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:31:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:31:54,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:31:54,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 20:31:54,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:54,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:31:54,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:55,308 INFO L124 PetriNetUnfolderBase]: 1921/2930 cut-off events. [2024-06-27 20:31:55,308 INFO L125 PetriNetUnfolderBase]: For 3456/3458 co-relation queries the response was YES. [2024-06-27 20:31:55,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8493 conditions, 2930 events. 1921/2930 cut-off events. For 3456/3458 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13976 event pairs, 784 based on Foata normal form. 7/2905 useless extension candidates. Maximal degree in co-relation 8476. Up to 2733 conditions per place. [2024-06-27 20:31:55,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 61 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2024-06-27 20:31:55,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 525 flow [2024-06-27 20:31:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:31:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:31:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 20:31:55,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-27 20:31:55,325 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 146 transitions. [2024-06-27 20:31:55,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 525 flow [2024-06-27 20:31:55,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 517 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:31:55,329 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 310 flow [2024-06-27 20:31:55,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-27 20:31:55,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 20:31:55,330 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 310 flow [2024-06-27 20:31:55,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 20:31:55,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:55,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:55,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:31:55,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:55,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:55,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1046208371, now seen corresponding path program 1 times [2024-06-27 20:31:55,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:55,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999640465] [2024-06-27 20:31:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:55,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:56,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:56,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999640465] [2024-06-27 20:31:56,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999640465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:56,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:56,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:31:56,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780994877] [2024-06-27 20:31:56,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:56,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:31:56,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:31:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:31:56,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:31:56,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 20:31:56,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:56,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:31:56,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:56,801 INFO L124 PetriNetUnfolderBase]: 1933/2950 cut-off events. [2024-06-27 20:31:56,802 INFO L125 PetriNetUnfolderBase]: For 5435/5437 co-relation queries the response was YES. [2024-06-27 20:31:56,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9454 conditions, 2950 events. 1933/2950 cut-off events. For 5435/5437 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14081 event pairs, 596 based on Foata normal form. 12/2930 useless extension candidates. Maximal degree in co-relation 9434. Up to 2701 conditions per place. [2024-06-27 20:31:56,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-27 20:31:56,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 626 flow [2024-06-27 20:31:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:31:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:31:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 20:31:56,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-27 20:31:56,820 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 310 flow. Second operand 7 states and 164 transitions. [2024-06-27 20:31:56,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 626 flow [2024-06-27 20:31:56,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 577 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:31:56,825 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 337 flow [2024-06-27 20:31:56,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 20:31:56,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:31:56,826 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 337 flow [2024-06-27 20:31:56,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 20:31:56,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:56,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:56,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:31:56,827 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 20:31:56,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1941900936, now seen corresponding path program 1 times [2024-06-27 20:31:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:56,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578096316] [2024-06-27 20:31:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:56,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:57,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578096316] [2024-06-27 20:31:57,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578096316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:57,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:57,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:31:57,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338795930] [2024-06-27 20:31:57,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:57,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:31:57,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:31:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:31:57,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:57,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 337 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 20:31:57,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:57,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:57,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:57,729 INFO L124 PetriNetUnfolderBase]: 1928/2939 cut-off events. [2024-06-27 20:31:57,729 INFO L125 PetriNetUnfolderBase]: For 7382/7382 co-relation queries the response was YES. [2024-06-27 20:31:57,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10049 conditions, 2939 events. 1928/2939 cut-off events. For 7382/7382 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13979 event pairs, 776 based on Foata normal form. 2/2906 useless extension candidates. Maximal degree in co-relation 10027. Up to 2844 conditions per place. [2024-06-27 20:31:57,744 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 55 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-27 20:31:57,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 491 flow [2024-06-27 20:31:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:31:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:31:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 20:31:57,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 20:31:57,746 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 337 flow. Second operand 5 states and 92 transitions. [2024-06-27 20:31:57,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 491 flow [2024-06-27 20:31:57,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 427 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:57,750 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 297 flow [2024-06-27 20:31:57,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 20:31:57,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:31:57,751 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 297 flow [2024-06-27 20:31:57,751 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 20:31:57,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:57,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:57,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:31:57,751 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 20:31:57,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash -69673986, now seen corresponding path program 1 times [2024-06-27 20:31:57,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:57,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6425965] [2024-06-27 20:31:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:57,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:58,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6425965] [2024-06-27 20:31:58,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6425965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:58,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:58,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:31:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356635859] [2024-06-27 20:31:58,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:31:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:31:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:31:58,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:58,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 297 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 20:31:58,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:58,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:58,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:58,817 INFO L124 PetriNetUnfolderBase]: 1932/2969 cut-off events. [2024-06-27 20:31:58,817 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-27 20:31:58,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10111 conditions, 2969 events. 1932/2969 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14198 event pairs, 727 based on Foata normal form. 6/2974 useless extension candidates. Maximal degree in co-relation 10087. Up to 2802 conditions per place. [2024-06-27 20:31:58,831 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-27 20:31:58,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 591 flow [2024-06-27 20:31:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:31:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:31:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:31:58,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 20:31:58,833 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 297 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:31:58,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 591 flow [2024-06-27 20:31:58,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 569 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:31:58,837 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 406 flow [2024-06-27 20:31:58,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-27 20:31:58,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-27 20:31:58,838 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 406 flow [2024-06-27 20:31:58,838 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 20:31:58,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:58,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:58,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:31:58,839 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 20:31:58,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 417428651, now seen corresponding path program 1 times [2024-06-27 20:31:58,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:58,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577291041] [2024-06-27 20:31:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:58,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:59,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:59,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577291041] [2024-06-27 20:31:59,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577291041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:59,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:59,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:31:59,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625444552] [2024-06-27 20:31:59,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:59,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:31:59,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:31:59,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:31:59,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:59,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 406 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 20:31:59,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:59,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:59,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:59,795 INFO L124 PetriNetUnfolderBase]: 1938/2988 cut-off events. [2024-06-27 20:31:59,795 INFO L125 PetriNetUnfolderBase]: For 12342/12346 co-relation queries the response was YES. [2024-06-27 20:31:59,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11223 conditions, 2988 events. 1938/2988 cut-off events. For 12342/12346 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14405 event pairs, 750 based on Foata normal form. 8/2994 useless extension candidates. Maximal degree in co-relation 11197. Up to 2784 conditions per place. [2024-06-27 20:31:59,809 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-06-27 20:31:59,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 678 flow [2024-06-27 20:31:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:31:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:31:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-27 20:31:59,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:31:59,811 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 406 flow. Second operand 6 states and 117 transitions. [2024-06-27 20:31:59,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 678 flow [2024-06-27 20:31:59,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 660 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 20:31:59,818 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 460 flow [2024-06-27 20:31:59,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-27 20:31:59,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-27 20:31:59,819 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 460 flow [2024-06-27 20:31:59,819 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 20:31:59,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:59,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:31:59,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:59,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2144004311, now seen corresponding path program 2 times [2024-06-27 20:31:59,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:59,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888542584] [2024-06-27 20:31:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:00,333 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 20:32:00,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:00,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888542584] [2024-06-27 20:32:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888542584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:00,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:00,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:00,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252039407] [2024-06-27 20:32:00,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:00,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:00,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 460 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 20:32:00,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:00,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:00,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:00,838 INFO L124 PetriNetUnfolderBase]: 1923/2962 cut-off events. [2024-06-27 20:32:00,838 INFO L125 PetriNetUnfolderBase]: For 13824/13824 co-relation queries the response was YES. [2024-06-27 20:32:00,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11342 conditions, 2962 events. 1923/2962 cut-off events. For 13824/13824 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14225 event pairs, 746 based on Foata normal form. 2/2962 useless extension candidates. Maximal degree in co-relation 11313. Up to 2825 conditions per place. [2024-06-27 20:32:00,851 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-06-27 20:32:00,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 660 flow [2024-06-27 20:32:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:32:00,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:32:00,852 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 460 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:32:00,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 85 transitions, 660 flow [2024-06-27 20:32:00,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 85 transitions, 631 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:00,860 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 461 flow [2024-06-27 20:32:00,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=461, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-06-27 20:32:00,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-27 20:32:00,861 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 461 flow [2024-06-27 20:32:00,861 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 20:32:00,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:00,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:00,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:32:00,862 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 20:32:00,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1849465907, now seen corresponding path program 1 times [2024-06-27 20:32:00,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:00,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673279539] [2024-06-27 20:32:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:00,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:01,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673279539] [2024-06-27 20:32:01,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673279539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:01,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:01,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504819448] [2024-06-27 20:32:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:01,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:01,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:01,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:01,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:01,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:01,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:01,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:01,969 INFO L124 PetriNetUnfolderBase]: 2091/3195 cut-off events. [2024-06-27 20:32:01,970 INFO L125 PetriNetUnfolderBase]: For 17123/17123 co-relation queries the response was YES. [2024-06-27 20:32:01,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12468 conditions, 3195 events. 2091/3195 cut-off events. For 17123/17123 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15260 event pairs, 644 based on Foata normal form. 12/3206 useless extension candidates. Maximal degree in co-relation 12438. Up to 2721 conditions per place. [2024-06-27 20:32:01,988 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 87 selfloop transitions, 31 changer transitions 0/122 dead transitions. [2024-06-27 20:32:01,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 122 transitions, 987 flow [2024-06-27 20:32:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 20:32:01,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-27 20:32:01,990 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 461 flow. Second operand 7 states and 146 transitions. [2024-06-27 20:32:01,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 122 transitions, 987 flow [2024-06-27 20:32:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 122 transitions, 940 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:02,044 INFO L231 Difference]: Finished difference. Result has 75 places, 89 transitions, 662 flow [2024-06-27 20:32:02,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=662, PETRI_PLACES=75, PETRI_TRANSITIONS=89} [2024-06-27 20:32:02,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-27 20:32:02,046 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 89 transitions, 662 flow [2024-06-27 20:32:02,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:02,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:02,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:02,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:32:02,047 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 20:32:02,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2039625387, now seen corresponding path program 2 times [2024-06-27 20:32:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:02,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421230965] [2024-06-27 20:32:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:02,607 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 20:32:02,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421230965] [2024-06-27 20:32:02,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421230965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:02,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:02,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:02,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065840953] [2024-06-27 20:32:02,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:02,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:02,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:02,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 89 transitions, 662 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:02,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:02,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:02,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:03,120 INFO L124 PetriNetUnfolderBase]: 2127/3249 cut-off events. [2024-06-27 20:32:03,120 INFO L125 PetriNetUnfolderBase]: For 22943/22943 co-relation queries the response was YES. [2024-06-27 20:32:03,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14611 conditions, 3249 events. 2127/3249 cut-off events. For 22943/22943 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15552 event pairs, 700 based on Foata normal form. 6/3254 useless extension candidates. Maximal degree in co-relation 14577. Up to 3007 conditions per place. [2024-06-27 20:32:03,139 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-27 20:32:03,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 124 transitions, 1144 flow [2024-06-27 20:32:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:32:03,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 20:32:03,141 INFO L175 Difference]: Start difference. First operand has 75 places, 89 transitions, 662 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:32:03,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 124 transitions, 1144 flow [2024-06-27 20:32:03,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 1100 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 20:32:03,160 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 770 flow [2024-06-27 20:32:03,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=770, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-27 20:32:03,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 20:32:03,161 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 770 flow [2024-06-27 20:32:03,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:03,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:03,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:03,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:32:03,162 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 20:32:03,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1762806237, now seen corresponding path program 3 times [2024-06-27 20:32:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906948950] [2024-06-27 20:32:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:03,750 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 20:32:03,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:03,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906948950] [2024-06-27 20:32:03,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906948950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:03,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:03,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:03,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255870161] [2024-06-27 20:32:03,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:03,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:03,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:03,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:03,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 770 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:03,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:03,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:03,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:04,326 INFO L124 PetriNetUnfolderBase]: 2131/3255 cut-off events. [2024-06-27 20:32:04,326 INFO L125 PetriNetUnfolderBase]: For 27428/27428 co-relation queries the response was YES. [2024-06-27 20:32:04,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15259 conditions, 3255 events. 2131/3255 cut-off events. For 27428/27428 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15608 event pairs, 694 based on Foata normal form. 6/3260 useless extension candidates. Maximal degree in co-relation 15221. Up to 3076 conditions per place. [2024-06-27 20:32:04,342 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 100 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-27 20:32:04,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 125 transitions, 1172 flow [2024-06-27 20:32:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:32:04,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:32:04,343 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 770 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:32:04,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 125 transitions, 1172 flow [2024-06-27 20:32:04,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 1123 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:04,359 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 848 flow [2024-06-27 20:32:04,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=848, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-27 20:32:04,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 20:32:04,360 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 848 flow [2024-06-27 20:32:04,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:04,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:04,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:04,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:32:04,360 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 20:32:04,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1672088309, now seen corresponding path program 1 times [2024-06-27 20:32:04,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:04,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010529537] [2024-06-27 20:32:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:04,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:05,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010529537] [2024-06-27 20:32:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010529537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:05,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:05,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:05,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969706877] [2024-06-27 20:32:05,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:05,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:05,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:05,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:05,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:05,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:05,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 848 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:05,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:05,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:05,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:05,756 INFO L124 PetriNetUnfolderBase]: 2134/3259 cut-off events. [2024-06-27 20:32:05,757 INFO L125 PetriNetUnfolderBase]: For 30219/30219 co-relation queries the response was YES. [2024-06-27 20:32:05,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15629 conditions, 3259 events. 2134/3259 cut-off events. For 30219/30219 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15643 event pairs, 673 based on Foata normal form. 6/3264 useless extension candidates. Maximal degree in co-relation 15589. Up to 3061 conditions per place. [2024-06-27 20:32:05,775 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-27 20:32:05,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 128 transitions, 1230 flow [2024-06-27 20:32:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:32:05,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:32:05,776 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 848 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:32:05,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 128 transitions, 1230 flow [2024-06-27 20:32:05,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 128 transitions, 1177 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:05,799 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 891 flow [2024-06-27 20:32:05,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=891, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-27 20:32:05,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-27 20:32:05,800 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 891 flow [2024-06-27 20:32:05,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:05,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:05,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:05,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:32:05,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:05,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:05,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1948830532, now seen corresponding path program 1 times [2024-06-27 20:32:05,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:05,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336052592] [2024-06-27 20:32:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:05,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:06,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:06,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336052592] [2024-06-27 20:32:06,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336052592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:06,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:06,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:32:06,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649825656] [2024-06-27 20:32:06,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:06,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:32:06,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:32:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:32:06,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:06,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 891 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:06,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:06,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:06,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:06,709 INFO L124 PetriNetUnfolderBase]: 2131/3255 cut-off events. [2024-06-27 20:32:06,709 INFO L125 PetriNetUnfolderBase]: For 32999/32999 co-relation queries the response was YES. [2024-06-27 20:32:06,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16074 conditions, 3255 events. 2131/3255 cut-off events. For 32999/32999 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15540 event pairs, 697 based on Foata normal form. 1/3255 useless extension candidates. Maximal degree in co-relation 16033. Up to 3137 conditions per place. [2024-06-27 20:32:06,726 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 102 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2024-06-27 20:32:06,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 1131 flow [2024-06-27 20:32:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:32:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:32:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 20:32:06,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 20:32:06,727 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 891 flow. Second operand 5 states and 88 transitions. [2024-06-27 20:32:06,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 1131 flow [2024-06-27 20:32:06,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 114 transitions, 1051 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:06,747 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 833 flow [2024-06-27 20:32:06,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=833, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-27 20:32:06,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-27 20:32:06,748 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 833 flow [2024-06-27 20:32:06,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:06,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:06,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:06,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:32:06,749 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 20:32:06,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1713197834, now seen corresponding path program 1 times [2024-06-27 20:32:06,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:06,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350518470] [2024-06-27 20:32:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:06,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:07,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:07,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350518470] [2024-06-27 20:32:07,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350518470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:07,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:07,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:07,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129326512] [2024-06-27 20:32:07,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:07,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:07,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:07,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:07,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 833 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:07,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:07,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:07,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:08,072 INFO L124 PetriNetUnfolderBase]: 2142/3272 cut-off events. [2024-06-27 20:32:08,072 INFO L125 PetriNetUnfolderBase]: For 36332/36338 co-relation queries the response was YES. [2024-06-27 20:32:08,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16245 conditions, 3272 events. 2142/3272 cut-off events. For 36332/36338 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15683 event pairs, 680 based on Foata normal form. 8/3279 useless extension candidates. Maximal degree in co-relation 16203. Up to 3032 conditions per place. [2024-06-27 20:32:08,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 109 selfloop transitions, 26 changer transitions 0/139 dead transitions. [2024-06-27 20:32:08,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 139 transitions, 1305 flow [2024-06-27 20:32:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:32:08,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 20:32:08,091 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 833 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:32:08,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 139 transitions, 1305 flow [2024-06-27 20:32:08,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1281 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:08,112 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 955 flow [2024-06-27 20:32:08,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=955, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-27 20:32:08,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-27 20:32:08,113 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 955 flow [2024-06-27 20:32:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:08,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:08,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:32:08,114 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 20:32:08,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1502592074, now seen corresponding path program 2 times [2024-06-27 20:32:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329002735] [2024-06-27 20:32:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:08,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:08,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:08,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329002735] [2024-06-27 20:32:08,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329002735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:08,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:08,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:08,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822852699] [2024-06-27 20:32:08,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:08,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:08,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:08,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:08,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:08,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 955 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:08,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:08,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:08,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:09,343 INFO L124 PetriNetUnfolderBase]: 2137/3265 cut-off events. [2024-06-27 20:32:09,344 INFO L125 PetriNetUnfolderBase]: For 41235/41241 co-relation queries the response was YES. [2024-06-27 20:32:09,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16875 conditions, 3265 events. 2137/3265 cut-off events. For 41235/41241 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15654 event pairs, 680 based on Foata normal form. 8/3272 useless extension candidates. Maximal degree in co-relation 16833. Up to 3060 conditions per place. [2024-06-27 20:32:09,358 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 108 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-27 20:32:09,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 134 transitions, 1271 flow [2024-06-27 20:32:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:32:09,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 20:32:09,359 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 955 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:32:09,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 134 transitions, 1271 flow [2024-06-27 20:32:09,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1190 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:09,384 INFO L231 Difference]: Finished difference. Result has 97 places, 112 transitions, 926 flow [2024-06-27 20:32:09,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=926, PETRI_PLACES=97, PETRI_TRANSITIONS=112} [2024-06-27 20:32:09,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 20:32:09,385 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 112 transitions, 926 flow [2024-06-27 20:32:09,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:09,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:09,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:09,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:32:09,386 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 20:32:09,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1498867269, now seen corresponding path program 1 times [2024-06-27 20:32:09,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:09,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511384684] [2024-06-27 20:32:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:09,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:09,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:09,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511384684] [2024-06-27 20:32:09,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511384684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:09,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:09,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:09,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59376436] [2024-06-27 20:32:09,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:09,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:09,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:10,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:10,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 112 transitions, 926 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:10,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:10,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:10,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:10,499 INFO L124 PetriNetUnfolderBase]: 2221/3380 cut-off events. [2024-06-27 20:32:10,499 INFO L125 PetriNetUnfolderBase]: For 46826/46828 co-relation queries the response was YES. [2024-06-27 20:32:10,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17807 conditions, 3380 events. 2221/3380 cut-off events. For 46826/46828 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16205 event pairs, 639 based on Foata normal form. 8/3387 useless extension candidates. Maximal degree in co-relation 17763. Up to 2821 conditions per place. [2024-06-27 20:32:10,517 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 102 selfloop transitions, 47 changer transitions 0/153 dead transitions. [2024-06-27 20:32:10,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 153 transitions, 1600 flow [2024-06-27 20:32:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 20:32:10,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-27 20:32:10,519 INFO L175 Difference]: Start difference. First operand has 97 places, 112 transitions, 926 flow. Second operand 7 states and 145 transitions. [2024-06-27 20:32:10,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 153 transitions, 1600 flow [2024-06-27 20:32:10,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 153 transitions, 1545 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:10,547 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 1133 flow [2024-06-27 20:32:10,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1133, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-27 20:32:10,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-27 20:32:10,548 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 1133 flow [2024-06-27 20:32:10,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:10,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:10,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:10,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:32:10,549 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 20:32:10,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1498872849, now seen corresponding path program 2 times [2024-06-27 20:32:10,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:10,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088164737] [2024-06-27 20:32:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:10,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:11,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:11,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088164737] [2024-06-27 20:32:11,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088164737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:11,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:11,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:11,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288566053] [2024-06-27 20:32:11,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:11,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:11,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:11,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:11,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 1133 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:11,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:11,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:11,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:11,739 INFO L124 PetriNetUnfolderBase]: 2209/3364 cut-off events. [2024-06-27 20:32:11,740 INFO L125 PetriNetUnfolderBase]: For 53119/53121 co-relation queries the response was YES. [2024-06-27 20:32:11,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18741 conditions, 3364 events. 2209/3364 cut-off events. For 53119/53121 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16116 event pairs, 636 based on Foata normal form. 8/3371 useless extension candidates. Maximal degree in co-relation 18694. Up to 2815 conditions per place. [2024-06-27 20:32:11,761 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 103 selfloop transitions, 50 changer transitions 0/157 dead transitions. [2024-06-27 20:32:11,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 157 transitions, 1723 flow [2024-06-27 20:32:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 20:32:11,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-27 20:32:11,763 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 1133 flow. Second operand 7 states and 148 transitions. [2024-06-27 20:32:11,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 157 transitions, 1723 flow [2024-06-27 20:32:11,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 157 transitions, 1628 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:11,807 INFO L231 Difference]: Finished difference. Result has 106 places, 124 transitions, 1241 flow [2024-06-27 20:32:11,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1241, PETRI_PLACES=106, PETRI_TRANSITIONS=124} [2024-06-27 20:32:11,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 20:32:11,808 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 124 transitions, 1241 flow [2024-06-27 20:32:11,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:11,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:11,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:11,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:32:11,809 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:11,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1188762136, now seen corresponding path program 1 times [2024-06-27 20:32:11,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:11,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549996260] [2024-06-27 20:32:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:11,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:12,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:12,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549996260] [2024-06-27 20:32:12,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549996260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:12,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:12,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:12,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456688318] [2024-06-27 20:32:12,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:12,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:12,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:12,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:12,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:12,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:12,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 124 transitions, 1241 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:32:12,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:12,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:12,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:13,193 INFO L124 PetriNetUnfolderBase]: 2211/3371 cut-off events. [2024-06-27 20:32:13,193 INFO L125 PetriNetUnfolderBase]: For 57677/57677 co-relation queries the response was YES. [2024-06-27 20:32:13,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19360 conditions, 3371 events. 2211/3371 cut-off events. For 57677/57677 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16185 event pairs, 669 based on Foata normal form. 3/3373 useless extension candidates. Maximal degree in co-relation 19310. Up to 3162 conditions per place. [2024-06-27 20:32:13,211 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2024-06-27 20:32:13,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 1677 flow [2024-06-27 20:32:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:32:13,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:32:13,213 INFO L175 Difference]: Start difference. First operand has 106 places, 124 transitions, 1241 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:32:13,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 1677 flow [2024-06-27 20:32:13,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 149 transitions, 1582 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:13,250 INFO L231 Difference]: Finished difference. Result has 108 places, 128 transitions, 1284 flow [2024-06-27 20:32:13,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1284, PETRI_PLACES=108, PETRI_TRANSITIONS=128} [2024-06-27 20:32:13,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 20:32:13,251 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 128 transitions, 1284 flow [2024-06-27 20:32:13,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:32:13,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:13,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:13,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:32:13,252 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:13,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1187580501, now seen corresponding path program 3 times [2024-06-27 20:32:13,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:13,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476384177] [2024-06-27 20:32:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:13,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:13,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476384177] [2024-06-27 20:32:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476384177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:13,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:13,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444379497] [2024-06-27 20:32:13,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:13,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:13,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:13,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 128 transitions, 1284 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:13,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:13,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:13,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:14,370 INFO L124 PetriNetUnfolderBase]: 2215/3379 cut-off events. [2024-06-27 20:32:14,370 INFO L125 PetriNetUnfolderBase]: For 61852/61858 co-relation queries the response was YES. [2024-06-27 20:32:14,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19625 conditions, 3379 events. 2215/3379 cut-off events. For 61852/61858 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16285 event pairs, 674 based on Foata normal form. 12/3390 useless extension candidates. Maximal degree in co-relation 19575. Up to 3167 conditions per place. [2024-06-27 20:32:14,391 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 23 changer transitions 0/154 dead transitions. [2024-06-27 20:32:14,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 154 transitions, 1739 flow [2024-06-27 20:32:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:32:14,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:32:14,392 INFO L175 Difference]: Start difference. First operand has 108 places, 128 transitions, 1284 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:32:14,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 154 transitions, 1739 flow [2024-06-27 20:32:14,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 154 transitions, 1653 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:14,435 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1320 flow [2024-06-27 20:32:14,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1320, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-27 20:32:14,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-27 20:32:14,436 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1320 flow [2024-06-27 20:32:14,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:14,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:14,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:14,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:32:14,436 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 20:32:14,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash 284206230, now seen corresponding path program 1 times [2024-06-27 20:32:14,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:14,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221887073] [2024-06-27 20:32:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:14,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:14,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:14,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221887073] [2024-06-27 20:32:14,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221887073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:14,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654055788] [2024-06-27 20:32:14,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:14,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:32:14,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1320 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:14,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:14,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:32:14,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:15,556 INFO L124 PetriNetUnfolderBase]: 2464/3630 cut-off events. [2024-06-27 20:32:15,556 INFO L125 PetriNetUnfolderBase]: For 75398/75398 co-relation queries the response was YES. [2024-06-27 20:32:15,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21801 conditions, 3630 events. 2464/3630 cut-off events. For 75398/75398 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16666 event pairs, 778 based on Foata normal form. 1/3630 useless extension candidates. Maximal degree in co-relation 21750. Up to 3612 conditions per place. [2024-06-27 20:32:15,584 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 130 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-06-27 20:32:15,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 144 transitions, 1650 flow [2024-06-27 20:32:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-27 20:32:15,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:32:15,585 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1320 flow. Second operand 6 states and 96 transitions. [2024-06-27 20:32:15,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 144 transitions, 1650 flow [2024-06-27 20:32:15,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 144 transitions, 1579 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:15,631 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1309 flow [2024-06-27 20:32:15,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-27 20:32:15,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-27 20:32:15,631 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1309 flow [2024-06-27 20:32:15,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:15,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:15,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:15,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:32:15,632 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:15,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash 661430064, now seen corresponding path program 1 times [2024-06-27 20:32:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:15,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185991087] [2024-06-27 20:32:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:16,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:16,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185991087] [2024-06-27 20:32:16,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185991087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:16,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:16,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:16,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212250386] [2024-06-27 20:32:16,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:16,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:16,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:16,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:16,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:16,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1309 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:16,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:16,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:16,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:17,241 INFO L124 PetriNetUnfolderBase]: 2301/3478 cut-off events. [2024-06-27 20:32:17,242 INFO L125 PetriNetUnfolderBase]: For 82010/82016 co-relation queries the response was YES. [2024-06-27 20:32:17,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21601 conditions, 3478 events. 2301/3478 cut-off events. For 82010/82016 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16734 event pairs, 533 based on Foata normal form. 10/3487 useless extension candidates. Maximal degree in co-relation 21549. Up to 3136 conditions per place. [2024-06-27 20:32:17,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 32 changer transitions 0/172 dead transitions. [2024-06-27 20:32:17,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 1901 flow [2024-06-27 20:32:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:32:17,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:32:17,263 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1309 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:32:17,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 1901 flow [2024-06-27 20:32:17,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 172 transitions, 1863 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:17,303 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1442 flow [2024-06-27 20:32:17,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1442, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-06-27 20:32:17,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-27 20:32:17,304 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1442 flow [2024-06-27 20:32:17,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:17,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:17,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:17,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:32:17,305 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:17,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash 661490514, now seen corresponding path program 2 times [2024-06-27 20:32:17,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:17,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812139805] [2024-06-27 20:32:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:17,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:18,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:18,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812139805] [2024-06-27 20:32:18,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812139805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:18,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:18,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:18,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459480835] [2024-06-27 20:32:18,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:18,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:18,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:18,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:18,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:18,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1442 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:18,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:18,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:18,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:18,764 INFO L124 PetriNetUnfolderBase]: 2318/3505 cut-off events. [2024-06-27 20:32:18,764 INFO L125 PetriNetUnfolderBase]: For 90451/90457 co-relation queries the response was YES. [2024-06-27 20:32:18,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22399 conditions, 3505 events. 2318/3505 cut-off events. For 90451/90457 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16848 event pairs, 674 based on Foata normal form. 10/3514 useless extension candidates. Maximal degree in co-relation 22346. Up to 3245 conditions per place. [2024-06-27 20:32:18,789 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 28 changer transitions 0/171 dead transitions. [2024-06-27 20:32:18,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1902 flow [2024-06-27 20:32:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:32:18,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:32:18,790 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1442 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:32:18,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1902 flow [2024-06-27 20:32:18,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 171 transitions, 1796 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:18,853 INFO L231 Difference]: Finished difference. Result has 119 places, 141 transitions, 1455 flow [2024-06-27 20:32:18,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1455, PETRI_PLACES=119, PETRI_TRANSITIONS=141} [2024-06-27 20:32:18,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-27 20:32:18,854 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 141 transitions, 1455 flow [2024-06-27 20:32:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:18,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:18,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:18,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:32:18,855 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 20:32:18,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash 661490638, now seen corresponding path program 1 times [2024-06-27 20:32:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:18,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692886594] [2024-06-27 20:32:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:19,611 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 20:32:19,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:19,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692886594] [2024-06-27 20:32:19,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692886594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:19,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:19,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:19,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600049074] [2024-06-27 20:32:19,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:19,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:19,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:19,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:19,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 141 transitions, 1455 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:19,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:19,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:20,336 INFO L124 PetriNetUnfolderBase]: 2421/3640 cut-off events. [2024-06-27 20:32:20,336 INFO L125 PetriNetUnfolderBase]: For 98775/98779 co-relation queries the response was YES. [2024-06-27 20:32:20,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23388 conditions, 3640 events. 2421/3640 cut-off events. For 98775/98779 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17603 event pairs, 582 based on Foata normal form. 8/3643 useless extension candidates. Maximal degree in co-relation 23333. Up to 2862 conditions per place. [2024-06-27 20:32:20,362 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 132 selfloop transitions, 67 changer transitions 0/204 dead transitions. [2024-06-27 20:32:20,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 2449 flow [2024-06-27 20:32:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:32:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:32:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 20:32:20,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-27 20:32:20,363 INFO L175 Difference]: Start difference. First operand has 119 places, 141 transitions, 1455 flow. Second operand 10 states and 208 transitions. [2024-06-27 20:32:20,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 2449 flow [2024-06-27 20:32:20,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 204 transitions, 2368 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:20,434 INFO L231 Difference]: Finished difference. Result has 125 places, 153 transitions, 1698 flow [2024-06-27 20:32:20,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1698, PETRI_PLACES=125, PETRI_TRANSITIONS=153} [2024-06-27 20:32:20,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-27 20:32:20,435 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 153 transitions, 1698 flow [2024-06-27 20:32:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:20,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:20,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:20,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:32:20,436 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 20:32:20,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash 664287024, now seen corresponding path program 3 times [2024-06-27 20:32:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798185832] [2024-06-27 20:32:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:21,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:21,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798185832] [2024-06-27 20:32:21,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798185832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:21,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:21,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:21,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101994490] [2024-06-27 20:32:21,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:21,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:21,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:21,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:21,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:21,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:21,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 153 transitions, 1698 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:21,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:21,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:21,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:22,060 INFO L124 PetriNetUnfolderBase]: 2397/3611 cut-off events. [2024-06-27 20:32:22,060 INFO L125 PetriNetUnfolderBase]: For 108401/108409 co-relation queries the response was YES. [2024-06-27 20:32:22,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24494 conditions, 3611 events. 2397/3611 cut-off events. For 108401/108409 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17432 event pairs, 671 based on Foata normal form. 10/3615 useless extension candidates. Maximal degree in co-relation 24436. Up to 3390 conditions per place. [2024-06-27 20:32:22,083 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 151 selfloop transitions, 24 changer transitions 0/180 dead transitions. [2024-06-27 20:32:22,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 180 transitions, 2116 flow [2024-06-27 20:32:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:32:22,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:32:22,084 INFO L175 Difference]: Start difference. First operand has 125 places, 153 transitions, 1698 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:32:22,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 180 transitions, 2116 flow [2024-06-27 20:32:22,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 180 transitions, 1949 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:22,154 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1586 flow [2024-06-27 20:32:22,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1586, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-27 20:32:22,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-27 20:32:22,155 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1586 flow [2024-06-27 20:32:22,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:22,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:22,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:22,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:32:22,155 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 20:32:22,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:22,156 INFO L85 PathProgramCache]: Analyzing trace with hash 779578318, now seen corresponding path program 2 times [2024-06-27 20:32:22,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:22,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544481736] [2024-06-27 20:32:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:22,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:22,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544481736] [2024-06-27 20:32:22,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544481736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:22,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:22,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156856116] [2024-06-27 20:32:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:22,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:23,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:23,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1586 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:23,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:23,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:23,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:23,660 INFO L124 PetriNetUnfolderBase]: 2432/3667 cut-off events. [2024-06-27 20:32:23,661 INFO L125 PetriNetUnfolderBase]: For 115343/115345 co-relation queries the response was YES. [2024-06-27 20:32:23,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24840 conditions, 3667 events. 2432/3667 cut-off events. For 115343/115345 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17836 event pairs, 554 based on Foata normal form. 6/3672 useless extension candidates. Maximal degree in co-relation 24780. Up to 2874 conditions per place. [2024-06-27 20:32:23,688 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 128 selfloop transitions, 78 changer transitions 0/211 dead transitions. [2024-06-27 20:32:23,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 211 transitions, 2647 flow [2024-06-27 20:32:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 20:32:23,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 20:32:23,689 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1586 flow. Second operand 8 states and 174 transitions. [2024-06-27 20:32:23,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 211 transitions, 2647 flow [2024-06-27 20:32:23,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 211 transitions, 2584 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:23,765 INFO L231 Difference]: Finished difference. Result has 132 places, 167 transitions, 1963 flow [2024-06-27 20:32:23,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1963, PETRI_PLACES=132, PETRI_TRANSITIONS=167} [2024-06-27 20:32:23,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 20:32:23,766 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 167 transitions, 1963 flow [2024-06-27 20:32:23,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:23,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:23,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:23,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:32:23,766 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 20:32:23,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:23,766 INFO L85 PathProgramCache]: Analyzing trace with hash 779582968, now seen corresponding path program 3 times [2024-06-27 20:32:23,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:23,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502957533] [2024-06-27 20:32:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:23,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:24,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:24,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502957533] [2024-06-27 20:32:24,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502957533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:24,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:24,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:24,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206018647] [2024-06-27 20:32:24,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:24,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:24,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:24,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:24,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 167 transitions, 1963 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:24,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:24,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:24,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:25,175 INFO L124 PetriNetUnfolderBase]: 2467/3718 cut-off events. [2024-06-27 20:32:25,176 INFO L125 PetriNetUnfolderBase]: For 129290/129292 co-relation queries the response was YES. [2024-06-27 20:32:25,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27127 conditions, 3718 events. 2467/3718 cut-off events. For 129290/129292 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18103 event pairs, 556 based on Foata normal form. 6/3723 useless extension candidates. Maximal degree in co-relation 27063. Up to 3066 conditions per place. [2024-06-27 20:32:25,204 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 134 selfloop transitions, 70 changer transitions 0/209 dead transitions. [2024-06-27 20:32:25,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 209 transitions, 2783 flow [2024-06-27 20:32:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 20:32:25,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-27 20:32:25,205 INFO L175 Difference]: Start difference. First operand has 132 places, 167 transitions, 1963 flow. Second operand 8 states and 167 transitions. [2024-06-27 20:32:25,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 209 transitions, 2783 flow [2024-06-27 20:32:25,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2696 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-27 20:32:25,310 INFO L231 Difference]: Finished difference. Result has 138 places, 171 transitions, 2105 flow [2024-06-27 20:32:25,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2105, PETRI_PLACES=138, PETRI_TRANSITIONS=171} [2024-06-27 20:32:25,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-27 20:32:25,310 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 171 transitions, 2105 flow [2024-06-27 20:32:25,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:25,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:25,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:25,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:32:25,311 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:25,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1687791798, now seen corresponding path program 4 times [2024-06-27 20:32:25,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:25,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232925896] [2024-06-27 20:32:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:25,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232925896] [2024-06-27 20:32:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232925896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:26,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637269089] [2024-06-27 20:32:26,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:26,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:26,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:26,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:26,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:26,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 171 transitions, 2105 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:26,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:26,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:26,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:26,867 INFO L124 PetriNetUnfolderBase]: 2502/3769 cut-off events. [2024-06-27 20:32:26,867 INFO L125 PetriNetUnfolderBase]: For 139464/139466 co-relation queries the response was YES. [2024-06-27 20:32:26,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28180 conditions, 3769 events. 2502/3769 cut-off events. For 139464/139466 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18342 event pairs, 555 based on Foata normal form. 8/3776 useless extension candidates. Maximal degree in co-relation 28114. Up to 3179 conditions per place. [2024-06-27 20:32:26,894 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 55 changer transitions 0/207 dead transitions. [2024-06-27 20:32:26,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 207 transitions, 2783 flow [2024-06-27 20:32:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:32:26,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:32:26,895 INFO L175 Difference]: Start difference. First operand has 138 places, 171 transitions, 2105 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:32:26,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 207 transitions, 2783 flow [2024-06-27 20:32:26,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 207 transitions, 2602 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:26,988 INFO L231 Difference]: Finished difference. Result has 140 places, 175 transitions, 2131 flow [2024-06-27 20:32:26,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2131, PETRI_PLACES=140, PETRI_TRANSITIONS=175} [2024-06-27 20:32:26,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 20:32:26,989 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 175 transitions, 2131 flow [2024-06-27 20:32:26,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:26,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:26,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:26,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:32:26,989 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 20:32:26,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:26,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1687798742, now seen corresponding path program 1 times [2024-06-27 20:32:26,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:26,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485422515] [2024-06-27 20:32:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:26,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:27,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:27,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485422515] [2024-06-27 20:32:27,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485422515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:27,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:27,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:27,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426425338] [2024-06-27 20:32:27,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:27,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:27,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:27,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:27,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:27,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 175 transitions, 2131 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:27,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:27,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:27,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:28,694 INFO L124 PetriNetUnfolderBase]: 2570/3869 cut-off events. [2024-06-27 20:32:28,694 INFO L125 PetriNetUnfolderBase]: For 151960/151962 co-relation queries the response was YES. [2024-06-27 20:32:28,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29063 conditions, 3869 events. 2570/3869 cut-off events. For 151960/151962 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18951 event pairs, 580 based on Foata normal form. 14/3882 useless extension candidates. Maximal degree in co-relation 28996. Up to 3261 conditions per place. [2024-06-27 20:32:28,729 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 154 selfloop transitions, 53 changer transitions 0/212 dead transitions. [2024-06-27 20:32:28,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 212 transitions, 2877 flow [2024-06-27 20:32:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:32:28,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 20:32:28,731 INFO L175 Difference]: Start difference. First operand has 140 places, 175 transitions, 2131 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:32:28,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 212 transitions, 2877 flow [2024-06-27 20:32:28,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 212 transitions, 2718 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:28,849 INFO L231 Difference]: Finished difference. Result has 142 places, 179 transitions, 2173 flow [2024-06-27 20:32:28,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1972, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2173, PETRI_PLACES=142, PETRI_TRANSITIONS=179} [2024-06-27 20:32:28,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 20:32:28,849 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 179 transitions, 2173 flow [2024-06-27 20:32:28,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:28,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:28,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:28,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:32:28,850 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:28,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:28,850 INFO L85 PathProgramCache]: Analyzing trace with hash -878650687, now seen corresponding path program 1 times [2024-06-27 20:32:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:28,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003484287] [2024-06-27 20:32:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:28,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:29,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:29,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003484287] [2024-06-27 20:32:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003484287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:29,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:29,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763773851] [2024-06-27 20:32:29,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:29,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:29,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:29,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:29,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:29,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 179 transitions, 2173 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:29,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:29,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:29,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:29,964 INFO L124 PetriNetUnfolderBase]: 2567/3866 cut-off events. [2024-06-27 20:32:29,964 INFO L125 PetriNetUnfolderBase]: For 155700/155700 co-relation queries the response was YES. [2024-06-27 20:32:29,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29623 conditions, 3866 events. 2567/3866 cut-off events. For 155700/155700 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18943 event pairs, 672 based on Foata normal form. 1/3866 useless extension candidates. Maximal degree in co-relation 29555. Up to 3722 conditions per place. [2024-06-27 20:32:29,997 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 177 selfloop transitions, 16 changer transitions 0/198 dead transitions. [2024-06-27 20:32:29,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 198 transitions, 2714 flow [2024-06-27 20:32:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:32:29,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:32:29,998 INFO L175 Difference]: Start difference. First operand has 142 places, 179 transitions, 2173 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:32:29,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 198 transitions, 2714 flow [2024-06-27 20:32:30,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 2539 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:30,117 INFO L231 Difference]: Finished difference. Result has 142 places, 182 transitions, 2093 flow [2024-06-27 20:32:30,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2093, PETRI_PLACES=142, PETRI_TRANSITIONS=182} [2024-06-27 20:32:30,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 20:32:30,118 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 182 transitions, 2093 flow [2024-06-27 20:32:30,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:30,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:30,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:30,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:32:30,118 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 20:32:30,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash -567637078, now seen corresponding path program 2 times [2024-06-27 20:32:30,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:30,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830429499] [2024-06-27 20:32:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:30,870 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 20:32:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830429499] [2024-06-27 20:32:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830429499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:30,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:30,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:30,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042642317] [2024-06-27 20:32:30,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:30,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:30,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:30,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:30,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 182 transitions, 2093 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:30,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:30,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:30,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:31,617 INFO L124 PetriNetUnfolderBase]: 2595/3910 cut-off events. [2024-06-27 20:32:31,618 INFO L125 PetriNetUnfolderBase]: For 165464/165464 co-relation queries the response was YES. [2024-06-27 20:32:31,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29497 conditions, 3910 events. 2595/3910 cut-off events. For 165464/165464 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19182 event pairs, 662 based on Foata normal form. 6/3915 useless extension candidates. Maximal degree in co-relation 29428. Up to 3704 conditions per place. [2024-06-27 20:32:31,652 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 24 changer transitions 0/211 dead transitions. [2024-06-27 20:32:31,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 211 transitions, 2707 flow [2024-06-27 20:32:31,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:32:31,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:32:31,653 INFO L175 Difference]: Start difference. First operand has 142 places, 182 transitions, 2093 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:32:31,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 211 transitions, 2707 flow [2024-06-27 20:32:31,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 211 transitions, 2564 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:31,776 INFO L231 Difference]: Finished difference. Result has 144 places, 185 transitions, 2088 flow [2024-06-27 20:32:31,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2088, PETRI_PLACES=144, PETRI_TRANSITIONS=185} [2024-06-27 20:32:31,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-27 20:32:31,777 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 185 transitions, 2088 flow [2024-06-27 20:32:31,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:31,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:31,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:31,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:32:31,778 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 20:32:31,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash -795538228, now seen corresponding path program 3 times [2024-06-27 20:32:31,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:31,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098122716] [2024-06-27 20:32:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:32,575 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 20:32:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098122716] [2024-06-27 20:32:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098122716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:32,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:32,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075294338] [2024-06-27 20:32:32,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:32,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:32,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:32,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:32,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 185 transitions, 2088 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:32,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:32,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:32,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:33,325 INFO L124 PetriNetUnfolderBase]: 2623/3954 cut-off events. [2024-06-27 20:32:33,326 INFO L125 PetriNetUnfolderBase]: For 175346/175346 co-relation queries the response was YES. [2024-06-27 20:32:33,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30245 conditions, 3954 events. 2623/3954 cut-off events. For 175346/175346 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19427 event pairs, 664 based on Foata normal form. 6/3959 useless extension candidates. Maximal degree in co-relation 30176. Up to 3688 conditions per place. [2024-06-27 20:32:33,363 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 30 changer transitions 0/216 dead transitions. [2024-06-27 20:32:33,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 2788 flow [2024-06-27 20:32:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:32:33,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:32:33,364 INFO L175 Difference]: Start difference. First operand has 144 places, 185 transitions, 2088 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:32:33,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 2788 flow [2024-06-27 20:32:33,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 2674 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:33,510 INFO L231 Difference]: Finished difference. Result has 146 places, 188 transitions, 2130 flow [2024-06-27 20:32:33,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2130, PETRI_PLACES=146, PETRI_TRANSITIONS=188} [2024-06-27 20:32:33,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-27 20:32:33,511 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 188 transitions, 2130 flow [2024-06-27 20:32:33,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:33,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:33,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:33,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:32:33,512 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 20:32:33,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash -567644022, now seen corresponding path program 5 times [2024-06-27 20:32:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685577757] [2024-06-27 20:32:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:34,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685577757] [2024-06-27 20:32:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685577757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:34,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:34,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703046901] [2024-06-27 20:32:34,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:34,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:34,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:34,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 188 transitions, 2130 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:34,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:34,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:34,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:34,990 INFO L124 PetriNetUnfolderBase]: 2641/3981 cut-off events. [2024-06-27 20:32:34,991 INFO L125 PetriNetUnfolderBase]: For 184444/184450 co-relation queries the response was YES. [2024-06-27 20:32:35,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30639 conditions, 3981 events. 2641/3981 cut-off events. For 184444/184450 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19589 event pairs, 659 based on Foata normal form. 15/3995 useless extension candidates. Maximal degree in co-relation 30569. Up to 3668 conditions per place. [2024-06-27 20:32:35,088 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 43 changer transitions 0/228 dead transitions. [2024-06-27 20:32:35,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 228 transitions, 3045 flow [2024-06-27 20:32:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:32:35,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 20:32:35,089 INFO L175 Difference]: Start difference. First operand has 146 places, 188 transitions, 2130 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:32:35,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 228 transitions, 3045 flow [2024-06-27 20:32:35,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 228 transitions, 2913 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:35,202 INFO L231 Difference]: Finished difference. Result has 149 places, 199 transitions, 2334 flow [2024-06-27 20:32:35,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=149, PETRI_TRANSITIONS=199} [2024-06-27 20:32:35,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-27 20:32:35,203 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 199 transitions, 2334 flow [2024-06-27 20:32:35,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:35,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:35,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:35,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:32:35,203 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 20:32:35,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1803089066, now seen corresponding path program 4 times [2024-06-27 20:32:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:35,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730708783] [2024-06-27 20:32:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:35,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:35,870 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 20:32:35,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730708783] [2024-06-27 20:32:35,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730708783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:35,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:35,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:35,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768144962] [2024-06-27 20:32:35,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:35,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:35,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:35,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:36,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:36,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 199 transitions, 2334 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:36,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:36,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:36,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:36,771 INFO L124 PetriNetUnfolderBase]: 2669/4024 cut-off events. [2024-06-27 20:32:36,771 INFO L125 PetriNetUnfolderBase]: For 193247/193247 co-relation queries the response was YES. [2024-06-27 20:32:36,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31343 conditions, 4024 events. 2669/4024 cut-off events. For 193247/193247 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19852 event pairs, 647 based on Foata normal form. 6/4029 useless extension candidates. Maximal degree in co-relation 31271. Up to 3790 conditions per place. [2024-06-27 20:32:36,803 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 28 changer transitions 0/228 dead transitions. [2024-06-27 20:32:36,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 228 transitions, 3000 flow [2024-06-27 20:32:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:32:36,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:32:36,804 INFO L175 Difference]: Start difference. First operand has 149 places, 199 transitions, 2334 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:32:36,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 228 transitions, 3000 flow [2024-06-27 20:32:36,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 228 transitions, 2877 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:36,929 INFO L231 Difference]: Finished difference. Result has 153 places, 202 transitions, 2371 flow [2024-06-27 20:32:36,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2211, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2371, PETRI_PLACES=153, PETRI_TRANSITIONS=202} [2024-06-27 20:32:36,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-27 20:32:36,929 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 202 transitions, 2371 flow [2024-06-27 20:32:36,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:36,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:36,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:36,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:32:36,930 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 20:32:36,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1847992318, now seen corresponding path program 5 times [2024-06-27 20:32:36,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:36,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955611144] [2024-06-27 20:32:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:36,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:37,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955611144] [2024-06-27 20:32:37,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955611144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:37,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:37,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:37,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621719606] [2024-06-27 20:32:37,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:37,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:37,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:37,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:37,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 202 transitions, 2371 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:37,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:37,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:37,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:38,506 INFO L124 PetriNetUnfolderBase]: 2672/4029 cut-off events. [2024-06-27 20:32:38,506 INFO L125 PetriNetUnfolderBase]: For 201370/201370 co-relation queries the response was YES. [2024-06-27 20:32:38,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31567 conditions, 4029 events. 2672/4029 cut-off events. For 201370/201370 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19909 event pairs, 663 based on Foata normal form. 6/4034 useless extension candidates. Maximal degree in co-relation 31493. Up to 3764 conditions per place. [2024-06-27 20:32:38,540 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 36 changer transitions 0/231 dead transitions. [2024-06-27 20:32:38,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 231 transitions, 3053 flow [2024-06-27 20:32:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:32:38,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:32:38,541 INFO L175 Difference]: Start difference. First operand has 153 places, 202 transitions, 2371 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:32:38,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 231 transitions, 3053 flow [2024-06-27 20:32:38,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 231 transitions, 2915 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:38,676 INFO L231 Difference]: Finished difference. Result has 155 places, 205 transitions, 2419 flow [2024-06-27 20:32:38,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2419, PETRI_PLACES=155, PETRI_TRANSITIONS=205} [2024-06-27 20:32:38,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 20:32:38,676 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 205 transitions, 2419 flow [2024-06-27 20:32:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:38,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:32:38,677 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:38,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1847992070, now seen corresponding path program 1 times [2024-06-27 20:32:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:38,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044182583] [2024-06-27 20:32:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:38,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:39,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:39,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044182583] [2024-06-27 20:32:39,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044182583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:39,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:39,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:39,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812766596] [2024-06-27 20:32:39,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:39,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:39,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:39,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:39,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 205 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:39,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:39,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:39,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:40,078 INFO L124 PetriNetUnfolderBase]: 2663/4017 cut-off events. [2024-06-27 20:32:40,078 INFO L125 PetriNetUnfolderBase]: For 207053/207057 co-relation queries the response was YES. [2024-06-27 20:32:40,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31682 conditions, 4017 events. 2663/4017 cut-off events. For 207053/207057 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19864 event pairs, 658 based on Foata normal form. 7/4023 useless extension candidates. Maximal degree in co-relation 31607. Up to 3756 conditions per place. [2024-06-27 20:32:40,115 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 36 changer transitions 0/227 dead transitions. [2024-06-27 20:32:40,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 227 transitions, 2991 flow [2024-06-27 20:32:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:32:40,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 20:32:40,116 INFO L175 Difference]: Start difference. First operand has 155 places, 205 transitions, 2419 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:32:40,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 227 transitions, 2991 flow [2024-06-27 20:32:40,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 227 transitions, 2801 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:40,295 INFO L231 Difference]: Finished difference. Result has 156 places, 205 transitions, 2315 flow [2024-06-27 20:32:40,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2315, PETRI_PLACES=156, PETRI_TRANSITIONS=205} [2024-06-27 20:32:40,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 20:32:40,295 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 205 transitions, 2315 flow [2024-06-27 20:32:40,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:40,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:40,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:40,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:32:40,296 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 20:32:40,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash 220446563, now seen corresponding path program 2 times [2024-06-27 20:32:40,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:40,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737608025] [2024-06-27 20:32:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:40,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:40,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:40,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737608025] [2024-06-27 20:32:40,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737608025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:40,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:40,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:40,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544576445] [2024-06-27 20:32:40,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:40,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:40,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:40,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:40,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 205 transitions, 2315 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:40,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:40,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:40,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:41,425 INFO L124 PetriNetUnfolderBase]: 2659/4011 cut-off events. [2024-06-27 20:32:41,426 INFO L125 PetriNetUnfolderBase]: For 212648/212648 co-relation queries the response was YES. [2024-06-27 20:32:41,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31619 conditions, 4011 events. 2659/4011 cut-off events. For 212648/212648 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19774 event pairs, 671 based on Foata normal form. 1/4011 useless extension candidates. Maximal degree in co-relation 31543. Up to 3886 conditions per place. [2024-06-27 20:32:41,461 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 198 selfloop transitions, 11 changer transitions 0/214 dead transitions. [2024-06-27 20:32:41,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 214 transitions, 2755 flow [2024-06-27 20:32:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:32:41,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 20:32:41,462 INFO L175 Difference]: Start difference. First operand has 156 places, 205 transitions, 2315 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:32:41,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 214 transitions, 2755 flow [2024-06-27 20:32:41,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 214 transitions, 2663 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:41,634 INFO L231 Difference]: Finished difference. Result has 156 places, 205 transitions, 2251 flow [2024-06-27 20:32:41,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2251, PETRI_PLACES=156, PETRI_TRANSITIONS=205} [2024-06-27 20:32:41,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 20:32:41,635 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 205 transitions, 2251 flow [2024-06-27 20:32:41,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:41,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:41,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:41,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:32:41,636 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 20:32:41,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -872930815, now seen corresponding path program 1 times [2024-06-27 20:32:41,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:41,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820522960] [2024-06-27 20:32:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:41,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:42,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820522960] [2024-06-27 20:32:42,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820522960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:42,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:42,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:42,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008989403] [2024-06-27 20:32:42,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:42,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:42,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:42,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 205 transitions, 2251 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:42,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:42,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:42,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:42,837 INFO L124 PetriNetUnfolderBase]: 2659/4011 cut-off events. [2024-06-27 20:32:42,837 INFO L125 PetriNetUnfolderBase]: For 210930/210930 co-relation queries the response was YES. [2024-06-27 20:32:42,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31190 conditions, 4011 events. 2659/4011 cut-off events. For 210930/210930 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19760 event pairs, 669 based on Foata normal form. 3/4013 useless extension candidates. Maximal degree in co-relation 31113. Up to 3837 conditions per place. [2024-06-27 20:32:42,872 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 192 selfloop transitions, 24 changer transitions 0/221 dead transitions. [2024-06-27 20:32:42,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 221 transitions, 2833 flow [2024-06-27 20:32:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 20:32:42,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:32:42,873 INFO L175 Difference]: Start difference. First operand has 156 places, 205 transitions, 2251 flow. Second operand 6 states and 111 transitions. [2024-06-27 20:32:42,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 221 transitions, 2833 flow [2024-06-27 20:32:43,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 221 transitions, 2801 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:43,071 INFO L231 Difference]: Finished difference. Result has 157 places, 208 transitions, 2326 flow [2024-06-27 20:32:43,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2326, PETRI_PLACES=157, PETRI_TRANSITIONS=208} [2024-06-27 20:32:43,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 20:32:43,072 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 208 transitions, 2326 flow [2024-06-27 20:32:43,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:43,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:43,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:43,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:32:43,072 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 20:32:43,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash 220452515, now seen corresponding path program 2 times [2024-06-27 20:32:43,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:43,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993555890] [2024-06-27 20:32:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:43,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:43,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993555890] [2024-06-27 20:32:43,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993555890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:43,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:43,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:43,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057135842] [2024-06-27 20:32:43,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:43,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:43,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:43,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:43,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 208 transitions, 2326 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:43,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:43,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:43,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:44,321 INFO L124 PetriNetUnfolderBase]: 2622/3956 cut-off events. [2024-06-27 20:32:44,321 INFO L125 PetriNetUnfolderBase]: For 218792/218794 co-relation queries the response was YES. [2024-06-27 20:32:44,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31090 conditions, 3956 events. 2622/3956 cut-off events. For 218792/218794 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19433 event pairs, 679 based on Foata normal form. 1/3956 useless extension candidates. Maximal degree in co-relation 31012. Up to 3783 conditions per place. [2024-06-27 20:32:44,357 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 187 selfloop transitions, 25 changer transitions 0/217 dead transitions. [2024-06-27 20:32:44,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 217 transitions, 2772 flow [2024-06-27 20:32:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:32:44,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:32:44,358 INFO L175 Difference]: Start difference. First operand has 157 places, 208 transitions, 2326 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:32:44,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 217 transitions, 2772 flow [2024-06-27 20:32:44,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 2712 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:44,527 INFO L231 Difference]: Finished difference. Result has 159 places, 208 transitions, 2322 flow [2024-06-27 20:32:44,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2322, PETRI_PLACES=159, PETRI_TRANSITIONS=208} [2024-06-27 20:32:44,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-27 20:32:44,528 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 208 transitions, 2322 flow [2024-06-27 20:32:44,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:44,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:44,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:44,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:32:44,528 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 20:32:44,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash -867208959, now seen corresponding path program 1 times [2024-06-27 20:32:44,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:44,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357733049] [2024-06-27 20:32:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:44,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:45,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357733049] [2024-06-27 20:32:45,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357733049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:45,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:45,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:45,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268693523] [2024-06-27 20:32:45,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:45,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:45,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:45,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:32:45,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 208 transitions, 2322 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:45,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:45,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:32:45,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:45,893 INFO L124 PetriNetUnfolderBase]: 2788/4117 cut-off events. [2024-06-27 20:32:45,893 INFO L125 PetriNetUnfolderBase]: For 227432/227432 co-relation queries the response was YES. [2024-06-27 20:32:45,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32206 conditions, 4117 events. 2788/4117 cut-off events. For 227432/227432 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19410 event pairs, 719 based on Foata normal form. 3/4119 useless extension candidates. Maximal degree in co-relation 32127. Up to 4090 conditions per place. [2024-06-27 20:32:45,927 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 206 selfloop transitions, 14 changer transitions 0/223 dead transitions. [2024-06-27 20:32:45,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 223 transitions, 2822 flow [2024-06-27 20:32:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 20:32:45,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-27 20:32:45,928 INFO L175 Difference]: Start difference. First operand has 159 places, 208 transitions, 2322 flow. Second operand 7 states and 110 transitions. [2024-06-27 20:32:45,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 223 transitions, 2822 flow [2024-06-27 20:32:46,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 223 transitions, 2750 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:46,112 INFO L231 Difference]: Finished difference. Result has 160 places, 211 transitions, 2322 flow [2024-06-27 20:32:46,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2250, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2322, PETRI_PLACES=160, PETRI_TRANSITIONS=211} [2024-06-27 20:32:46,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 20:32:46,113 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 211 transitions, 2322 flow [2024-06-27 20:32:46,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:46,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:46,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:46,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:32:46,113 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:46,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:46,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1408804264, now seen corresponding path program 1 times [2024-06-27 20:32:46,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:46,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780950420] [2024-06-27 20:32:46,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:46,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:47,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780950420] [2024-06-27 20:32:47,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780950420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:47,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:47,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:47,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624764950] [2024-06-27 20:32:47,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:47,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:47,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:47,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:47,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 211 transitions, 2322 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:47,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:47,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:47,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:47,967 INFO L124 PetriNetUnfolderBase]: 2994/4525 cut-off events. [2024-06-27 20:32:47,967 INFO L125 PetriNetUnfolderBase]: For 288527/288529 co-relation queries the response was YES. [2024-06-27 20:32:47,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37328 conditions, 4525 events. 2994/4525 cut-off events. For 288527/288529 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23060 event pairs, 471 based on Foata normal form. 26/4535 useless extension candidates. Maximal degree in co-relation 37249. Up to 2644 conditions per place. [2024-06-27 20:32:48,010 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 193 selfloop transitions, 77 changer transitions 0/275 dead transitions. [2024-06-27 20:32:48,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 275 transitions, 3683 flow [2024-06-27 20:32:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 20:32:48,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-27 20:32:48,012 INFO L175 Difference]: Start difference. First operand has 160 places, 211 transitions, 2322 flow. Second operand 9 states and 194 transitions. [2024-06-27 20:32:48,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 275 transitions, 3683 flow [2024-06-27 20:32:48,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 275 transitions, 3633 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:48,254 INFO L231 Difference]: Finished difference. Result has 166 places, 217 transitions, 2642 flow [2024-06-27 20:32:48,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2642, PETRI_PLACES=166, PETRI_TRANSITIONS=217} [2024-06-27 20:32:48,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-27 20:32:48,255 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 217 transitions, 2642 flow [2024-06-27 20:32:48,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:48,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:48,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:48,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:32:48,255 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 20:32:48,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash -968629360, now seen corresponding path program 2 times [2024-06-27 20:32:48,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:48,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110905302] [2024-06-27 20:32:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:48,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:49,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:49,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110905302] [2024-06-27 20:32:49,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110905302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:49,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:49,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:49,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690300006] [2024-06-27 20:32:49,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:49,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:49,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:49,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:49,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:49,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 217 transitions, 2642 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:49,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:49,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:49,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:50,054 INFO L124 PetriNetUnfolderBase]: 3298/5022 cut-off events. [2024-06-27 20:32:50,055 INFO L125 PetriNetUnfolderBase]: For 337571/337573 co-relation queries the response was YES. [2024-06-27 20:32:50,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43298 conditions, 5022 events. 3298/5022 cut-off events. For 337571/337573 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26675 event pairs, 747 based on Foata normal form. 24/5042 useless extension candidates. Maximal degree in co-relation 43216. Up to 3621 conditions per place. [2024-06-27 20:32:50,100 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 99 changer transitions 0/280 dead transitions. [2024-06-27 20:32:50,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 280 transitions, 3992 flow [2024-06-27 20:32:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 20:32:50,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-27 20:32:50,101 INFO L175 Difference]: Start difference. First operand has 166 places, 217 transitions, 2642 flow. Second operand 9 states and 191 transitions. [2024-06-27 20:32:50,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 280 transitions, 3992 flow [2024-06-27 20:32:50,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 280 transitions, 3827 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:50,446 INFO L231 Difference]: Finished difference. Result has 172 places, 227 transitions, 2882 flow [2024-06-27 20:32:50,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2882, PETRI_PLACES=172, PETRI_TRANSITIONS=227} [2024-06-27 20:32:50,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-27 20:32:50,447 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 227 transitions, 2882 flow [2024-06-27 20:32:50,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:50,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:50,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:50,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:32:50,453 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 20:32:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash -968625640, now seen corresponding path program 3 times [2024-06-27 20:32:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:50,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903300207] [2024-06-27 20:32:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903300207] [2024-06-27 20:32:51,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903300207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:51,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:51,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944621701] [2024-06-27 20:32:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:51,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:51,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:51,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:51,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:51,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 227 transitions, 2882 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:51,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:51,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:51,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:52,607 INFO L124 PetriNetUnfolderBase]: 3445/5261 cut-off events. [2024-06-27 20:32:52,608 INFO L125 PetriNetUnfolderBase]: For 382058/382060 co-relation queries the response was YES. [2024-06-27 20:32:52,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45126 conditions, 5261 events. 3445/5261 cut-off events. For 382058/382060 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28307 event pairs, 788 based on Foata normal form. 62/5322 useless extension candidates. Maximal degree in co-relation 45041. Up to 3964 conditions per place. [2024-06-27 20:32:52,660 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 187 selfloop transitions, 95 changer transitions 0/287 dead transitions. [2024-06-27 20:32:52,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 287 transitions, 4056 flow [2024-06-27 20:32:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:32:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:32:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-27 20:32:52,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-06-27 20:32:52,661 INFO L175 Difference]: Start difference. First operand has 172 places, 227 transitions, 2882 flow. Second operand 11 states and 228 transitions. [2024-06-27 20:32:52,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 287 transitions, 4056 flow [2024-06-27 20:32:53,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 287 transitions, 3921 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:53,015 INFO L231 Difference]: Finished difference. Result has 180 places, 230 transitions, 3069 flow [2024-06-27 20:32:53,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3069, PETRI_PLACES=180, PETRI_TRANSITIONS=230} [2024-06-27 20:32:53,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 20:32:53,016 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 230 transitions, 3069 flow [2024-06-27 20:32:53,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:53,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:53,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:32:53,016 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 20:32:53,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -881937550, now seen corresponding path program 4 times [2024-06-27 20:32:53,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:53,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402862528] [2024-06-27 20:32:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:53,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:53,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402862528] [2024-06-27 20:32:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402862528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:53,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:53,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862570311] [2024-06-27 20:32:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:53,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:53,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:53,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 230 transitions, 3069 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:53,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:53,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:53,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:55,009 INFO L124 PetriNetUnfolderBase]: 3645/5573 cut-off events. [2024-06-27 20:32:55,009 INFO L125 PetriNetUnfolderBase]: For 381176/381178 co-relation queries the response was YES. [2024-06-27 20:32:55,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 5573 events. 3645/5573 cut-off events. For 381176/381178 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30254 event pairs, 900 based on Foata normal form. 26/5592 useless extension candidates. Maximal degree in co-relation 49059. Up to 4397 conditions per place. [2024-06-27 20:32:55,065 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 214 selfloop transitions, 66 changer transitions 0/285 dead transitions. [2024-06-27 20:32:55,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 285 transitions, 4368 flow [2024-06-27 20:32:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 20:32:55,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-27 20:32:55,066 INFO L175 Difference]: Start difference. First operand has 180 places, 230 transitions, 3069 flow. Second operand 9 states and 188 transitions. [2024-06-27 20:32:55,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 285 transitions, 4368 flow [2024-06-27 20:32:55,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 285 transitions, 4076 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-27 20:32:55,496 INFO L231 Difference]: Finished difference. Result has 181 places, 235 transitions, 3155 flow [2024-06-27 20:32:55,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3155, PETRI_PLACES=181, PETRI_TRANSITIONS=235} [2024-06-27 20:32:55,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 20:32:55,497 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 235 transitions, 3155 flow [2024-06-27 20:32:55,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:55,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:55,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:55,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:32:55,498 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:55,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1468664541, now seen corresponding path program 1 times [2024-06-27 20:32:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:55,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247906860] [2024-06-27 20:32:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:55,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:56,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247906860] [2024-06-27 20:32:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247906860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:56,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:56,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:56,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500463077] [2024-06-27 20:32:56,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:56,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:56,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:56,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:56,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:56,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 235 transitions, 3155 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:56,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:56,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:56,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:56,992 INFO L124 PetriNetUnfolderBase]: 3654/5590 cut-off events. [2024-06-27 20:32:56,992 INFO L125 PetriNetUnfolderBase]: For 373147/373149 co-relation queries the response was YES. [2024-06-27 20:32:57,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48788 conditions, 5590 events. 3654/5590 cut-off events. For 373147/373149 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30482 event pairs, 942 based on Foata normal form. 6/5595 useless extension candidates. Maximal degree in co-relation 48699. Up to 5027 conditions per place. [2024-06-27 20:32:57,049 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 63 changer transitions 0/267 dead transitions. [2024-06-27 20:32:57,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 267 transitions, 4018 flow [2024-06-27 20:32:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:32:57,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 20:32:57,051 INFO L175 Difference]: Start difference. First operand has 181 places, 235 transitions, 3155 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:32:57,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 267 transitions, 4018 flow [2024-06-27 20:32:57,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 267 transitions, 3814 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:57,431 INFO L231 Difference]: Finished difference. Result has 183 places, 240 transitions, 3185 flow [2024-06-27 20:32:57,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3185, PETRI_PLACES=183, PETRI_TRANSITIONS=240} [2024-06-27 20:32:57,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 20:32:57,432 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 240 transitions, 3185 flow [2024-06-27 20:32:57,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:57,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:57,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:57,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:32:57,433 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:57,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:57,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1602878576, now seen corresponding path program 5 times [2024-06-27 20:32:57,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:57,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049305454] [2024-06-27 20:32:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:58,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:58,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049305454] [2024-06-27 20:32:58,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049305454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:58,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:58,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:58,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275009169] [2024-06-27 20:32:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:58,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:58,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:58,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:58,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 240 transitions, 3185 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:58,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:58,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:58,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:59,413 INFO L124 PetriNetUnfolderBase]: 3939/6059 cut-off events. [2024-06-27 20:32:59,413 INFO L125 PetriNetUnfolderBase]: For 436853/436855 co-relation queries the response was YES. [2024-06-27 20:32:59,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53696 conditions, 6059 events. 3939/6059 cut-off events. For 436853/436855 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33987 event pairs, 882 based on Foata normal form. 24/6082 useless extension candidates. Maximal degree in co-relation 53605. Up to 4445 conditions per place. [2024-06-27 20:32:59,481 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 188 selfloop transitions, 106 changer transitions 0/299 dead transitions. [2024-06-27 20:32:59,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 299 transitions, 4595 flow [2024-06-27 20:32:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 20:32:59,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 20:32:59,482 INFO L175 Difference]: Start difference. First operand has 183 places, 240 transitions, 3185 flow. Second operand 9 states and 196 transitions. [2024-06-27 20:32:59,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 299 transitions, 4595 flow [2024-06-27 20:32:59,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 299 transitions, 4482 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:59,941 INFO L231 Difference]: Finished difference. Result has 189 places, 245 transitions, 3496 flow [2024-06-27 20:32:59,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3072, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=189, PETRI_TRANSITIONS=245} [2024-06-27 20:32:59,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 20:32:59,941 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 245 transitions, 3496 flow [2024-06-27 20:32:59,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:59,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:59,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:59,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:32:59,942 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:59,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:59,942 INFO L85 PathProgramCache]: Analyzing trace with hash 165505544, now seen corresponding path program 6 times [2024-06-27 20:32:59,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:59,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744054304] [2024-06-27 20:32:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:59,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:00,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:00,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744054304] [2024-06-27 20:33:00,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744054304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:00,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:00,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:00,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149985266] [2024-06-27 20:33:00,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:00,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:00,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:00,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:00,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 245 transitions, 3496 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:00,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:00,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:00,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:01,953 INFO L124 PetriNetUnfolderBase]: 4062/6262 cut-off events. [2024-06-27 20:33:01,953 INFO L125 PetriNetUnfolderBase]: For 476474/476476 co-relation queries the response was YES. [2024-06-27 20:33:01,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56612 conditions, 6262 events. 4062/6262 cut-off events. For 476474/476476 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35502 event pairs, 1078 based on Foata normal form. 30/6291 useless extension candidates. Maximal degree in co-relation 56519. Up to 5248 conditions per place. [2024-06-27 20:33:02,021 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 187 selfloop transitions, 103 changer transitions 0/295 dead transitions. [2024-06-27 20:33:02,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 295 transitions, 4586 flow [2024-06-27 20:33:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 20:33:02,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-27 20:33:02,022 INFO L175 Difference]: Start difference. First operand has 189 places, 245 transitions, 3496 flow. Second operand 9 states and 191 transitions. [2024-06-27 20:33:02,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 295 transitions, 4586 flow [2024-06-27 20:33:02,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 295 transitions, 4362 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:02,678 INFO L231 Difference]: Finished difference. Result has 193 places, 247 transitions, 3586 flow [2024-06-27 20:33:02,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3586, PETRI_PLACES=193, PETRI_TRANSITIONS=247} [2024-06-27 20:33:02,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 20:33:02,679 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 247 transitions, 3586 flow [2024-06-27 20:33:02,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:02,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:02,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:02,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:33:02,680 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 20:33:02,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash 171219836, now seen corresponding path program 1 times [2024-06-27 20:33:02,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:02,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070994801] [2024-06-27 20:33:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:02,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:03,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:03,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070994801] [2024-06-27 20:33:03,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070994801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:03,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:03,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566378999] [2024-06-27 20:33:03,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:03,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:03,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:03,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:03,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 247 transitions, 3586 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:03,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:03,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:03,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:04,637 INFO L124 PetriNetUnfolderBase]: 4078/6294 cut-off events. [2024-06-27 20:33:04,638 INFO L125 PetriNetUnfolderBase]: For 472805/472807 co-relation queries the response was YES. [2024-06-27 20:33:04,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57127 conditions, 6294 events. 4078/6294 cut-off events. For 472805/472807 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35828 event pairs, 1056 based on Foata normal form. 8/6301 useless extension candidates. Maximal degree in co-relation 57032. Up to 5705 conditions per place. [2024-06-27 20:33:04,701 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 61 changer transitions 0/281 dead transitions. [2024-06-27 20:33:04,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 4419 flow [2024-06-27 20:33:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:33:04,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:33:04,702 INFO L175 Difference]: Start difference. First operand has 193 places, 247 transitions, 3586 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:33:04,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 4419 flow [2024-06-27 20:33:05,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 281 transitions, 4151 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:05,207 INFO L231 Difference]: Finished difference. Result has 194 places, 250 transitions, 3561 flow [2024-06-27 20:33:05,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3561, PETRI_PLACES=194, PETRI_TRANSITIONS=250} [2024-06-27 20:33:05,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 20:33:05,207 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 250 transitions, 3561 flow [2024-06-27 20:33:05,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:05,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:05,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:05,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:33:05,208 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 20:33:05,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1889847728, now seen corresponding path program 7 times [2024-06-27 20:33:05,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:05,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446038890] [2024-06-27 20:33:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:06,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:06,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446038890] [2024-06-27 20:33:06,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446038890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:06,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:06,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:06,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272915080] [2024-06-27 20:33:06,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:06,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:06,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:06,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:06,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 250 transitions, 3561 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:06,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:06,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:06,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:07,353 INFO L124 PetriNetUnfolderBase]: 4214/6510 cut-off events. [2024-06-27 20:33:07,353 INFO L125 PetriNetUnfolderBase]: For 516970/516972 co-relation queries the response was YES. [2024-06-27 20:33:07,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58638 conditions, 6510 events. 4214/6510 cut-off events. For 516970/516972 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 37311 event pairs, 1115 based on Foata normal form. 30/6539 useless extension candidates. Maximal degree in co-relation 58542. Up to 5681 conditions per place. [2024-06-27 20:33:07,421 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 209 selfloop transitions, 78 changer transitions 0/292 dead transitions. [2024-06-27 20:33:07,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 292 transitions, 4451 flow [2024-06-27 20:33:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:33:07,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:33:07,423 INFO L175 Difference]: Start difference. First operand has 194 places, 250 transitions, 3561 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:33:07,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 292 transitions, 4451 flow [2024-06-27 20:33:08,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 292 transitions, 4235 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:08,005 INFO L231 Difference]: Finished difference. Result has 197 places, 252 transitions, 3611 flow [2024-06-27 20:33:08,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3611, PETRI_PLACES=197, PETRI_TRANSITIONS=252} [2024-06-27 20:33:08,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-27 20:33:08,006 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 252 transitions, 3611 flow [2024-06-27 20:33:08,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:08,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:08,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:08,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:33:08,006 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 20:33:08,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash 782154450, now seen corresponding path program 2 times [2024-06-27 20:33:08,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:08,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218104015] [2024-06-27 20:33:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:08,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:08,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218104015] [2024-06-27 20:33:08,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218104015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:08,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:08,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:08,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699863984] [2024-06-27 20:33:08,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:08,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:08,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:08,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:09,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:09,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 252 transitions, 3611 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:09,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:09,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:09,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:10,219 INFO L124 PetriNetUnfolderBase]: 4670/7190 cut-off events. [2024-06-27 20:33:10,219 INFO L125 PetriNetUnfolderBase]: For 541657/541659 co-relation queries the response was YES. [2024-06-27 20:33:10,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65193 conditions, 7190 events. 4670/7190 cut-off events. For 541657/541659 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 41527 event pairs, 1227 based on Foata normal form. 8/7197 useless extension candidates. Maximal degree in co-relation 65096. Up to 6438 conditions per place. [2024-06-27 20:33:10,297 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 260 selfloop transitions, 74 changer transitions 0/339 dead transitions. [2024-06-27 20:33:10,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 339 transitions, 5626 flow [2024-06-27 20:33:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:33:10,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:33:10,299 INFO L175 Difference]: Start difference. First operand has 197 places, 252 transitions, 3611 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:33:10,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 339 transitions, 5626 flow [2024-06-27 20:33:10,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 339 transitions, 5410 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:10,948 INFO L231 Difference]: Finished difference. Result has 204 places, 296 transitions, 4539 flow [2024-06-27 20:33:10,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4539, PETRI_PLACES=204, PETRI_TRANSITIONS=296} [2024-06-27 20:33:10,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 20:33:10,949 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 296 transitions, 4539 flow [2024-06-27 20:33:10,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:10,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:10,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:10,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:33:10,949 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 20:33:10,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash 776582820, now seen corresponding path program 3 times [2024-06-27 20:33:10,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:10,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257356038] [2024-06-27 20:33:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:10,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257356038] [2024-06-27 20:33:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257356038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:11,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:11,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:11,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589861937] [2024-06-27 20:33:11,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:11,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:11,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:11,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:11,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 296 transitions, 4539 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:11,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:11,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:11,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:13,209 INFO L124 PetriNetUnfolderBase]: 4688/7215 cut-off events. [2024-06-27 20:33:13,209 INFO L125 PetriNetUnfolderBase]: For 554032/554040 co-relation queries the response was YES. [2024-06-27 20:33:13,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65748 conditions, 7215 events. 4688/7215 cut-off events. For 554032/554040 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41763 event pairs, 1145 based on Foata normal form. 20/7234 useless extension candidates. Maximal degree in co-relation 65646. Up to 6359 conditions per place. [2024-06-27 20:33:13,282 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 234 selfloop transitions, 94 changer transitions 0/333 dead transitions. [2024-06-27 20:33:13,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 333 transitions, 5606 flow [2024-06-27 20:33:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:33:13,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 20:33:13,283 INFO L175 Difference]: Start difference. First operand has 204 places, 296 transitions, 4539 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:33:13,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 333 transitions, 5606 flow [2024-06-27 20:33:14,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 333 transitions, 5414 flow, removed 95 selfloop flow, removed 1 redundant places. [2024-06-27 20:33:14,096 INFO L231 Difference]: Finished difference. Result has 211 places, 299 transitions, 4674 flow [2024-06-27 20:33:14,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4674, PETRI_PLACES=211, PETRI_TRANSITIONS=299} [2024-06-27 20:33:14,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-27 20:33:14,097 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 299 transitions, 4674 flow [2024-06-27 20:33:14,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:14,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:14,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:14,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:33:14,097 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:14,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1602730706, now seen corresponding path program 8 times [2024-06-27 20:33:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069414805] [2024-06-27 20:33:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:14,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:15,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:15,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069414805] [2024-06-27 20:33:15,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069414805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:15,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:15,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:15,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794837208] [2024-06-27 20:33:15,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:15,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:15,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 299 transitions, 4674 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:15,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:15,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:15,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:16,475 INFO L124 PetriNetUnfolderBase]: 4880/7535 cut-off events. [2024-06-27 20:33:16,475 INFO L125 PetriNetUnfolderBase]: For 645798/645806 co-relation queries the response was YES. [2024-06-27 20:33:16,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69552 conditions, 7535 events. 4880/7535 cut-off events. For 645798/645806 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44298 event pairs, 1174 based on Foata normal form. 56/7590 useless extension candidates. Maximal degree in co-relation 69447. Up to 6333 conditions per place. [2024-06-27 20:33:16,566 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 241 selfloop transitions, 99 changer transitions 0/345 dead transitions. [2024-06-27 20:33:16,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 345 transitions, 5835 flow [2024-06-27 20:33:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 20:33:16,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-27 20:33:16,567 INFO L175 Difference]: Start difference. First operand has 211 places, 299 transitions, 4674 flow. Second operand 9 states and 185 transitions. [2024-06-27 20:33:16,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 345 transitions, 5835 flow [2024-06-27 20:33:17,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 345 transitions, 5527 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:17,380 INFO L231 Difference]: Finished difference. Result has 214 places, 302 transitions, 4730 flow [2024-06-27 20:33:17,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4366, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4730, PETRI_PLACES=214, PETRI_TRANSITIONS=302} [2024-06-27 20:33:17,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 20:33:17,381 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 302 transitions, 4730 flow [2024-06-27 20:33:17,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:17,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:17,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:17,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:33:17,382 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 20:33:17,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1468365639, now seen corresponding path program 1 times [2024-06-27 20:33:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:17,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574296755] [2024-06-27 20:33:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:17,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574296755] [2024-06-27 20:33:17,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574296755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:17,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:17,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902820791] [2024-06-27 20:33:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:17,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:17,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:18,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:18,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 302 transitions, 4730 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:18,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:18,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:18,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:19,242 INFO L124 PetriNetUnfolderBase]: 5047/7700 cut-off events. [2024-06-27 20:33:19,242 INFO L125 PetriNetUnfolderBase]: For 608086/608092 co-relation queries the response was YES. [2024-06-27 20:33:19,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71050 conditions, 7700 events. 5047/7700 cut-off events. For 608086/608092 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44414 event pairs, 1364 based on Foata normal form. 7/7706 useless extension candidates. Maximal degree in co-relation 70944. Up to 7640 conditions per place. [2024-06-27 20:33:19,332 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 296 selfloop transitions, 25 changer transitions 0/324 dead transitions. [2024-06-27 20:33:19,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 324 transitions, 5620 flow [2024-06-27 20:33:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:33:19,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:33:19,333 INFO L175 Difference]: Start difference. First operand has 214 places, 302 transitions, 4730 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:33:19,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 324 transitions, 5620 flow [2024-06-27 20:33:20,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 324 transitions, 5339 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:20,336 INFO L231 Difference]: Finished difference. Result has 214 places, 308 transitions, 4616 flow [2024-06-27 20:33:20,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4616, PETRI_PLACES=214, PETRI_TRANSITIONS=308} [2024-06-27 20:33:20,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 20:33:20,337 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 308 transitions, 4616 flow [2024-06-27 20:33:20,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:20,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:20,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:33:20,337 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 20:33:20,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1468366011, now seen corresponding path program 2 times [2024-06-27 20:33:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:20,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576129129] [2024-06-27 20:33:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:20,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:20,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576129129] [2024-06-27 20:33:20,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576129129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:20,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:20,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:20,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698402696] [2024-06-27 20:33:20,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:20,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:20,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:20,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:20,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:20,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 308 transitions, 4616 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:20,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:20,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:20,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:22,509 INFO L124 PetriNetUnfolderBase]: 4959/7644 cut-off events. [2024-06-27 20:33:22,510 INFO L125 PetriNetUnfolderBase]: For 619945/619947 co-relation queries the response was YES. [2024-06-27 20:33:22,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69832 conditions, 7644 events. 4959/7644 cut-off events. For 619945/619947 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 44803 event pairs, 1224 based on Foata normal form. 10/7653 useless extension candidates. Maximal degree in co-relation 69725. Up to 6794 conditions per place. [2024-06-27 20:33:22,607 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 236 selfloop transitions, 98 changer transitions 0/341 dead transitions. [2024-06-27 20:33:22,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 341 transitions, 5824 flow [2024-06-27 20:33:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:33:22,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:33:22,608 INFO L175 Difference]: Start difference. First operand has 214 places, 308 transitions, 4616 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:33:22,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 341 transitions, 5824 flow [2024-06-27 20:33:23,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 341 transitions, 5741 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:23,527 INFO L231 Difference]: Finished difference. Result has 218 places, 321 transitions, 5069 flow [2024-06-27 20:33:23,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5069, PETRI_PLACES=218, PETRI_TRANSITIONS=321} [2024-06-27 20:33:23,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 20:33:23,528 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 321 transitions, 5069 flow [2024-06-27 20:33:23,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:23,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:23,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:23,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:33:23,528 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:23,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash 53770448, now seen corresponding path program 4 times [2024-06-27 20:33:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:23,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082148009] [2024-06-27 20:33:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:23,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:24,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:24,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082148009] [2024-06-27 20:33:24,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082148009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:24,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:24,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:24,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777866779] [2024-06-27 20:33:24,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:24,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:24,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:24,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:24,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 321 transitions, 5069 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:24,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:24,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:24,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:25,763 INFO L124 PetriNetUnfolderBase]: 4984/7682 cut-off events. [2024-06-27 20:33:25,763 INFO L125 PetriNetUnfolderBase]: For 640388/640392 co-relation queries the response was YES. [2024-06-27 20:33:25,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71360 conditions, 7682 events. 4984/7682 cut-off events. For 640388/640392 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45186 event pairs, 1421 based on Foata normal form. 10/7691 useless extension candidates. Maximal degree in co-relation 71251. Up to 7439 conditions per place. [2024-06-27 20:33:25,856 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 30 changer transitions 0/349 dead transitions. [2024-06-27 20:33:25,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 349 transitions, 5950 flow [2024-06-27 20:33:25,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:33:25,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:33:25,858 INFO L175 Difference]: Start difference. First operand has 218 places, 321 transitions, 5069 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:33:25,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 349 transitions, 5950 flow [2024-06-27 20:33:26,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 349 transitions, 5740 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:26,730 INFO L231 Difference]: Finished difference. Result has 222 places, 324 transitions, 5064 flow [2024-06-27 20:33:26,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5064, PETRI_PLACES=222, PETRI_TRANSITIONS=324} [2024-06-27 20:33:26,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-27 20:33:26,730 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 324 transitions, 5064 flow [2024-06-27 20:33:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:26,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:26,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:26,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:33:26,731 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:26,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash 319475168, now seen corresponding path program 5 times [2024-06-27 20:33:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233581267] [2024-06-27 20:33:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:27,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:27,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233581267] [2024-06-27 20:33:27,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233581267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:27,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:27,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617738778] [2024-06-27 20:33:27,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:27,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:27,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:27,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 324 transitions, 5064 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:27,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:27,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:27,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:28,921 INFO L124 PetriNetUnfolderBase]: 5009/7721 cut-off events. [2024-06-27 20:33:28,921 INFO L125 PetriNetUnfolderBase]: For 671961/671965 co-relation queries the response was YES. [2024-06-27 20:33:28,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71807 conditions, 7721 events. 5009/7721 cut-off events. For 671961/671965 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 45363 event pairs, 1351 based on Foata normal form. 10/7730 useless extension candidates. Maximal degree in co-relation 71697. Up to 7454 conditions per place. [2024-06-27 20:33:29,017 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 33 changer transitions 0/352 dead transitions. [2024-06-27 20:33:29,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 352 transitions, 5936 flow [2024-06-27 20:33:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:33:29,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:33:29,018 INFO L175 Difference]: Start difference. First operand has 222 places, 324 transitions, 5064 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:33:29,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 352 transitions, 5936 flow [2024-06-27 20:33:30,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 352 transitions, 5758 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:30,081 INFO L231 Difference]: Finished difference. Result has 224 places, 327 transitions, 5086 flow [2024-06-27 20:33:30,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4886, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5086, PETRI_PLACES=224, PETRI_TRANSITIONS=327} [2024-06-27 20:33:30,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-27 20:33:30,082 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 327 transitions, 5086 flow [2024-06-27 20:33:30,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:30,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:30,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:30,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:33:30,082 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:30,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash 53777888, now seen corresponding path program 6 times [2024-06-27 20:33:30,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:30,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480423685] [2024-06-27 20:33:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:30,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:30,814 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 20:33:30,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480423685] [2024-06-27 20:33:30,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480423685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:30,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:30,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:30,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510065650] [2024-06-27 20:33:30,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:30,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:30,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:30,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 327 transitions, 5086 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:30,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:30,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:30,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:32,276 INFO L124 PetriNetUnfolderBase]: 5034/7760 cut-off events. [2024-06-27 20:33:32,277 INFO L125 PetriNetUnfolderBase]: For 689197/689201 co-relation queries the response was YES. [2024-06-27 20:33:32,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72645 conditions, 7760 events. 5034/7760 cut-off events. For 689197/689201 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45669 event pairs, 1443 based on Foata normal form. 10/7769 useless extension candidates. Maximal degree in co-relation 72534. Up to 7462 conditions per place. [2024-06-27 20:33:32,371 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 313 selfloop transitions, 35 changer transitions 0/355 dead transitions. [2024-06-27 20:33:32,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 355 transitions, 5987 flow [2024-06-27 20:33:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:33:32,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:33:32,372 INFO L175 Difference]: Start difference. First operand has 224 places, 327 transitions, 5086 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:33:32,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 355 transitions, 5987 flow [2024-06-27 20:33:33,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 355 transitions, 5811 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:33,439 INFO L231 Difference]: Finished difference. Result has 226 places, 330 transitions, 5135 flow [2024-06-27 20:33:33,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5135, PETRI_PLACES=226, PETRI_TRANSITIONS=330} [2024-06-27 20:33:33,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 20:33:33,439 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 330 transitions, 5135 flow [2024-06-27 20:33:33,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:33,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:33,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:33,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:33:33,440 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:33,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:33,440 INFO L85 PathProgramCache]: Analyzing trace with hash 53562686, now seen corresponding path program 9 times [2024-06-27 20:33:33,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:33,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805625649] [2024-06-27 20:33:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:33,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:34,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805625649] [2024-06-27 20:33:34,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805625649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:34,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:34,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:34,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906152907] [2024-06-27 20:33:34,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:34,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:34,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:34,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:34,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:34,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 330 transitions, 5135 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:34,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:34,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:34,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:35,881 INFO L124 PetriNetUnfolderBase]: 5095/7863 cut-off events. [2024-06-27 20:33:35,881 INFO L125 PetriNetUnfolderBase]: For 760685/760689 co-relation queries the response was YES. [2024-06-27 20:33:35,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73030 conditions, 7863 events. 5095/7863 cut-off events. For 760685/760689 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 46409 event pairs, 1424 based on Foata normal form. 52/7914 useless extension candidates. Maximal degree in co-relation 72918. Up to 7334 conditions per place. [2024-06-27 20:33:35,985 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 325 selfloop transitions, 36 changer transitions 0/368 dead transitions. [2024-06-27 20:33:35,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 368 transitions, 6131 flow [2024-06-27 20:33:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:33:35,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:33:35,986 INFO L175 Difference]: Start difference. First operand has 226 places, 330 transitions, 5135 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:33:35,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 368 transitions, 6131 flow [2024-06-27 20:33:37,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 368 transitions, 5933 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:37,095 INFO L231 Difference]: Finished difference. Result has 230 places, 334 transitions, 5200 flow [2024-06-27 20:33:37,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4937, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5200, PETRI_PLACES=230, PETRI_TRANSITIONS=334} [2024-06-27 20:33:37,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-27 20:33:37,096 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 334 transitions, 5200 flow [2024-06-27 20:33:37,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:37,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:37,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:37,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:33:37,096 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:37,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 310278398, now seen corresponding path program 7 times [2024-06-27 20:33:37,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:37,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514994477] [2024-06-27 20:33:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:37,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:37,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:37,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514994477] [2024-06-27 20:33:37,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514994477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:37,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:37,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:37,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082238968] [2024-06-27 20:33:37,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:37,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:37,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:37,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:37,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 334 transitions, 5200 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:37,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:37,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:37,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:39,443 INFO L124 PetriNetUnfolderBase]: 5133/7921 cut-off events. [2024-06-27 20:33:39,443 INFO L125 PetriNetUnfolderBase]: For 731801/731805 co-relation queries the response was YES. [2024-06-27 20:33:39,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74091 conditions, 7921 events. 5133/7921 cut-off events. For 731801/731805 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 46887 event pairs, 1428 based on Foata normal form. 10/7930 useless extension candidates. Maximal degree in co-relation 73977. Up to 7494 conditions per place. [2024-06-27 20:33:39,542 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 56 changer transitions 0/367 dead transitions. [2024-06-27 20:33:39,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 367 transitions, 6460 flow [2024-06-27 20:33:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:33:39,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:33:39,543 INFO L175 Difference]: Start difference. First operand has 230 places, 334 transitions, 5200 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:33:39,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 367 transitions, 6460 flow [2024-06-27 20:33:40,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 367 transitions, 6292 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:40,812 INFO L231 Difference]: Finished difference. Result has 233 places, 340 transitions, 5426 flow [2024-06-27 20:33:40,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5032, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5426, PETRI_PLACES=233, PETRI_TRANSITIONS=340} [2024-06-27 20:33:40,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 20:33:40,812 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 340 transitions, 5426 flow [2024-06-27 20:33:40,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:40,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:40,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:40,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:33:40,812 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:40,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:40,813 INFO L85 PathProgramCache]: Analyzing trace with hash 310270958, now seen corresponding path program 8 times [2024-06-27 20:33:40,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:40,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619095440] [2024-06-27 20:33:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:40,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:41,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:41,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619095440] [2024-06-27 20:33:41,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619095440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:41,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:41,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:41,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271615087] [2024-06-27 20:33:41,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:41,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:41,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:41,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:41,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 340 transitions, 5426 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:41,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:41,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:41,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:43,136 INFO L124 PetriNetUnfolderBase]: 5120/7902 cut-off events. [2024-06-27 20:33:43,136 INFO L125 PetriNetUnfolderBase]: For 715547/715551 co-relation queries the response was YES. [2024-06-27 20:33:43,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72874 conditions, 7902 events. 5120/7902 cut-off events. For 715547/715551 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46776 event pairs, 1425 based on Foata normal form. 10/7911 useless extension candidates. Maximal degree in co-relation 72759. Up to 7594 conditions per place. [2024-06-27 20:33:43,234 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 46 changer transitions 0/365 dead transitions. [2024-06-27 20:33:43,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 365 transitions, 6208 flow [2024-06-27 20:33:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:33:43,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:33:43,235 INFO L175 Difference]: Start difference. First operand has 233 places, 340 transitions, 5426 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:33:43,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 365 transitions, 6208 flow [2024-06-27 20:33:44,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 365 transitions, 5928 flow, removed 117 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:44,582 INFO L231 Difference]: Finished difference. Result has 237 places, 340 transitions, 5250 flow [2024-06-27 20:33:44,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5250, PETRI_PLACES=237, PETRI_TRANSITIONS=340} [2024-06-27 20:33:44,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:33:44,582 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 340 transitions, 5250 flow [2024-06-27 20:33:44,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:44,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:44,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:44,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:33:44,583 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 20:33:44,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1756089257, now seen corresponding path program 2 times [2024-06-27 20:33:44,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:44,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981865017] [2024-06-27 20:33:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:44,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:45,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:45,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981865017] [2024-06-27 20:33:45,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981865017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:45,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:45,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449305515] [2024-06-27 20:33:45,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:45,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:45,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:45,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:45,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:45,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 340 transitions, 5250 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:45,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:45,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:45,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:46,470 INFO L124 PetriNetUnfolderBase]: 5273/8056 cut-off events. [2024-06-27 20:33:46,470 INFO L125 PetriNetUnfolderBase]: For 722424/722424 co-relation queries the response was YES. [2024-06-27 20:33:46,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73811 conditions, 8056 events. 5273/8056 cut-off events. For 722424/722424 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46905 event pairs, 1499 based on Foata normal form. 1/8056 useless extension candidates. Maximal degree in co-relation 73694. Up to 8021 conditions per place. [2024-06-27 20:33:46,569 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 20 changer transitions 0/353 dead transitions. [2024-06-27 20:33:46,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 353 transitions, 6138 flow [2024-06-27 20:33:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:33:46,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 20:33:46,570 INFO L175 Difference]: Start difference. First operand has 237 places, 340 transitions, 5250 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:33:46,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 353 transitions, 6138 flow [2024-06-27 20:33:47,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 353 transitions, 6034 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:47,484 INFO L231 Difference]: Finished difference. Result has 237 places, 343 transitions, 5238 flow [2024-06-27 20:33:47,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5238, PETRI_PLACES=237, PETRI_TRANSITIONS=343} [2024-06-27 20:33:47,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:33:47,485 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 343 transitions, 5238 flow [2024-06-27 20:33:47,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:47,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:47,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:47,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:33:47,485 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 20:33:47,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:47,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1113686889, now seen corresponding path program 3 times [2024-06-27 20:33:47,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:47,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758762997] [2024-06-27 20:33:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:47,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:47,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758762997] [2024-06-27 20:33:47,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758762997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:47,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:47,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:47,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046323627] [2024-06-27 20:33:47,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:47,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:48,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:48,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 343 transitions, 5238 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:48,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:48,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:48,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:49,404 INFO L124 PetriNetUnfolderBase]: 5270/8052 cut-off events. [2024-06-27 20:33:49,404 INFO L125 PetriNetUnfolderBase]: For 741317/741317 co-relation queries the response was YES. [2024-06-27 20:33:49,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73893 conditions, 8052 events. 5270/8052 cut-off events. For 741317/741317 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46879 event pairs, 1499 based on Foata normal form. 1/8052 useless extension candidates. Maximal degree in co-relation 73775. Up to 8024 conditions per place. [2024-06-27 20:33:49,504 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 15 changer transitions 0/352 dead transitions. [2024-06-27 20:33:49,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 352 transitions, 5958 flow [2024-06-27 20:33:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 20:33:49,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-27 20:33:49,506 INFO L175 Difference]: Start difference. First operand has 237 places, 343 transitions, 5238 flow. Second operand 7 states and 108 transitions. [2024-06-27 20:33:49,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 352 transitions, 5958 flow [2024-06-27 20:33:50,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 352 transitions, 5851 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:50,594 INFO L231 Difference]: Finished difference. Result has 239 places, 343 transitions, 5167 flow [2024-06-27 20:33:50,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5167, PETRI_PLACES=239, PETRI_TRANSITIONS=343} [2024-06-27 20:33:50,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 20:33:50,595 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 343 transitions, 5167 flow [2024-06-27 20:33:50,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:50,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:50,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:50,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:33:50,595 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 20:33:50,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:50,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1114102971, now seen corresponding path program 3 times [2024-06-27 20:33:50,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:50,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041787514] [2024-06-27 20:33:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:50,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:51,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:51,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041787514] [2024-06-27 20:33:51,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041787514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:51,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:51,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:51,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737927197] [2024-06-27 20:33:51,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:51,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:51,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:51,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 343 transitions, 5167 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:51,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:51,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:51,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:52,500 INFO L124 PetriNetUnfolderBase]: 5116/7899 cut-off events. [2024-06-27 20:33:52,500 INFO L125 PetriNetUnfolderBase]: For 759396/759398 co-relation queries the response was YES. [2024-06-27 20:33:52,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72954 conditions, 7899 events. 5116/7899 cut-off events. For 759396/759398 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46708 event pairs, 1446 based on Foata normal form. 6/7904 useless extension candidates. Maximal degree in co-relation 72835. Up to 7686 conditions per place. [2024-06-27 20:33:52,596 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 35 changer transitions 0/355 dead transitions. [2024-06-27 20:33:52,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 355 transitions, 6015 flow [2024-06-27 20:33:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:33:52,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 20:33:52,597 INFO L175 Difference]: Start difference. First operand has 239 places, 343 transitions, 5167 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:33:52,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 355 transitions, 6015 flow [2024-06-27 20:33:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 355 transitions, 5965 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:53,772 INFO L231 Difference]: Finished difference. Result has 240 places, 343 transitions, 5197 flow [2024-06-27 20:33:53,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5197, PETRI_PLACES=240, PETRI_TRANSITIONS=343} [2024-06-27 20:33:53,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-27 20:33:53,773 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 343 transitions, 5197 flow [2024-06-27 20:33:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:53,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:53,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:53,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:33:53,773 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:53,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1670742560, now seen corresponding path program 9 times [2024-06-27 20:33:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:53,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245096483] [2024-06-27 20:33:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:53,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:54,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:54,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245096483] [2024-06-27 20:33:54,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245096483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:54,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:54,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:54,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9285010] [2024-06-27 20:33:54,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:54,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:54,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:54,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:54,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:54,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:54,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 343 transitions, 5197 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:54,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:54,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:54,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:56,266 INFO L124 PetriNetUnfolderBase]: 5654/8698 cut-off events. [2024-06-27 20:33:56,266 INFO L125 PetriNetUnfolderBase]: For 805081/805083 co-relation queries the response was YES. [2024-06-27 20:33:56,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80585 conditions, 8698 events. 5654/8698 cut-off events. For 805081/805083 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51999 event pairs, 1234 based on Foata normal form. 8/8705 useless extension candidates. Maximal degree in co-relation 80465. Up to 7238 conditions per place. [2024-06-27 20:33:56,374 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 304 selfloop transitions, 160 changer transitions 0/472 dead transitions. [2024-06-27 20:33:56,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 472 transitions, 8181 flow [2024-06-27 20:33:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:33:56,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 20:33:56,375 INFO L175 Difference]: Start difference. First operand has 240 places, 343 transitions, 5197 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:33:56,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 472 transitions, 8181 flow [2024-06-27 20:33:57,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 472 transitions, 7737 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:33:57,854 INFO L231 Difference]: Finished difference. Result has 245 places, 411 transitions, 6712 flow [2024-06-27 20:33:57,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6712, PETRI_PLACES=245, PETRI_TRANSITIONS=411} [2024-06-27 20:33:57,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 20:33:57,855 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 411 transitions, 6712 flow [2024-06-27 20:33:57,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:57,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:57,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:33:57,856 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 20:33:57,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -935025513, now seen corresponding path program 1 times [2024-06-27 20:33:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:57,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330807854] [2024-06-27 20:33:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:57,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:58,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:58,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330807854] [2024-06-27 20:33:58,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330807854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:58,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:58,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:58,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966994802] [2024-06-27 20:33:58,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:58,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:58,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:58,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:58,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 411 transitions, 6712 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:58,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:58,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:58,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:00,102 INFO L124 PetriNetUnfolderBase]: 5817/8857 cut-off events. [2024-06-27 20:34:00,102 INFO L125 PetriNetUnfolderBase]: For 816227/816227 co-relation queries the response was YES. [2024-06-27 20:34:00,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83877 conditions, 8857 events. 5817/8857 cut-off events. For 816227/816227 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52111 event pairs, 1658 based on Foata normal form. 3/8859 useless extension candidates. Maximal degree in co-relation 83754. Up to 8739 conditions per place. [2024-06-27 20:34:00,216 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 31 changer transitions 0/434 dead transitions. [2024-06-27 20:34:00,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 434 transitions, 7864 flow [2024-06-27 20:34:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:34:00,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:34:00,217 INFO L175 Difference]: Start difference. First operand has 245 places, 411 transitions, 6712 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:34:00,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 434 transitions, 7864 flow [2024-06-27 20:34:01,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 434 transitions, 7578 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:01,612 INFO L231 Difference]: Finished difference. Result has 248 places, 418 transitions, 6594 flow [2024-06-27 20:34:01,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6426, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6594, PETRI_PLACES=248, PETRI_TRANSITIONS=418} [2024-06-27 20:34:01,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-27 20:34:01,613 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 418 transitions, 6594 flow [2024-06-27 20:34:01,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:01,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:01,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:01,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:34:01,614 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 20:34:01,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1755667595, now seen corresponding path program 2 times [2024-06-27 20:34:01,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:01,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028100916] [2024-06-27 20:34:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:01,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:02,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:02,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028100916] [2024-06-27 20:34:02,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028100916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:02,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:02,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:02,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553594544] [2024-06-27 20:34:02,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:02,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:02,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:02,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:02,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 418 transitions, 6594 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:02,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:02,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:02,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:03,851 INFO L124 PetriNetUnfolderBase]: 5822/8866 cut-off events. [2024-06-27 20:34:03,852 INFO L125 PetriNetUnfolderBase]: For 832896/832898 co-relation queries the response was YES. [2024-06-27 20:34:03,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83635 conditions, 8866 events. 5822/8866 cut-off events. For 832896/832898 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52107 event pairs, 1672 based on Foata normal form. 1/8866 useless extension candidates. Maximal degree in co-relation 83511. Up to 8743 conditions per place. [2024-06-27 20:34:03,966 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 39 changer transitions 0/437 dead transitions. [2024-06-27 20:34:03,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 437 transitions, 7862 flow [2024-06-27 20:34:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:34:03,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 20:34:03,967 INFO L175 Difference]: Start difference. First operand has 248 places, 418 transitions, 6594 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:34:03,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 437 transitions, 7862 flow [2024-06-27 20:34:05,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 437 transitions, 7784 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:05,509 INFO L231 Difference]: Finished difference. Result has 252 places, 424 transitions, 6710 flow [2024-06-27 20:34:05,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6520, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6710, PETRI_PLACES=252, PETRI_TRANSITIONS=424} [2024-06-27 20:34:05,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 20:34:05,510 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 424 transitions, 6710 flow [2024-06-27 20:34:05,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:05,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:05,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:05,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:34:05,510 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 20:34:05,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1505334509, now seen corresponding path program 3 times [2024-06-27 20:34:05,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:05,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925099722] [2024-06-27 20:34:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:05,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925099722] [2024-06-27 20:34:06,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925099722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115654804] [2024-06-27 20:34:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:06,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:06,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:06,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 424 transitions, 6710 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:06,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:06,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:06,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:07,937 INFO L124 PetriNetUnfolderBase]: 5819/8862 cut-off events. [2024-06-27 20:34:07,937 INFO L125 PetriNetUnfolderBase]: For 854570/854572 co-relation queries the response was YES. [2024-06-27 20:34:07,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84027 conditions, 8862 events. 5819/8862 cut-off events. For 854570/854572 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52133 event pairs, 1672 based on Foata normal form. 1/8862 useless extension candidates. Maximal degree in co-relation 83901. Up to 8741 conditions per place. [2024-06-27 20:34:08,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 396 selfloop transitions, 37 changer transitions 0/436 dead transitions. [2024-06-27 20:34:08,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 436 transitions, 7740 flow [2024-06-27 20:34:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:34:08,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:34:08,030 INFO L175 Difference]: Start difference. First operand has 252 places, 424 transitions, 6710 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:34:08,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 436 transitions, 7740 flow [2024-06-27 20:34:09,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 436 transitions, 7628 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:09,407 INFO L231 Difference]: Finished difference. Result has 256 places, 424 transitions, 6678 flow [2024-06-27 20:34:09,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6598, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6678, PETRI_PLACES=256, PETRI_TRANSITIONS=424} [2024-06-27 20:34:09,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-27 20:34:09,408 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 424 transitions, 6678 flow [2024-06-27 20:34:09,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:09,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:09,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:09,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:34:09,408 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:09,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -598684856, now seen corresponding path program 1 times [2024-06-27 20:34:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:09,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913539067] [2024-06-27 20:34:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:09,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:10,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:10,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913539067] [2024-06-27 20:34:10,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913539067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:10,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:10,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:10,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58873659] [2024-06-27 20:34:10,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:10,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:10,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:10,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:10,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 424 transitions, 6678 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:10,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:10,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:10,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:12,010 INFO L124 PetriNetUnfolderBase]: 5709/8755 cut-off events. [2024-06-27 20:34:12,011 INFO L125 PetriNetUnfolderBase]: For 880789/880797 co-relation queries the response was YES. [2024-06-27 20:34:12,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83757 conditions, 8755 events. 5709/8755 cut-off events. For 880789/880797 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52060 event pairs, 1263 based on Foata normal form. 12/8766 useless extension candidates. Maximal degree in co-relation 83629. Up to 7218 conditions per place. [2024-06-27 20:34:12,116 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 288 selfloop transitions, 165 changer transitions 0/465 dead transitions. [2024-06-27 20:34:12,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 465 transitions, 8068 flow [2024-06-27 20:34:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:34:12,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 20:34:12,117 INFO L175 Difference]: Start difference. First operand has 256 places, 424 transitions, 6678 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:34:12,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 465 transitions, 8068 flow [2024-06-27 20:34:13,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 465 transitions, 7978 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:13,702 INFO L231 Difference]: Finished difference. Result has 259 places, 429 transitions, 7037 flow [2024-06-27 20:34:13,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7037, PETRI_PLACES=259, PETRI_TRANSITIONS=429} [2024-06-27 20:34:13,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 20:34:13,703 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 429 transitions, 7037 flow [2024-06-27 20:34:13,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:13,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:13,703 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 20:34:13,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:34:13,703 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:13,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash -548666931, now seen corresponding path program 1 times [2024-06-27 20:34:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:13,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644339673] [2024-06-27 20:34:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:13,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:14,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:14,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644339673] [2024-06-27 20:34:14,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644339673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:14,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:14,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:14,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373715052] [2024-06-27 20:34:14,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:14,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:14,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:14,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:14,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 429 transitions, 7037 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:14,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:14,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:14,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:16,050 INFO L124 PetriNetUnfolderBase]: 5899/8968 cut-off events. [2024-06-27 20:34:16,051 INFO L125 PetriNetUnfolderBase]: For 921717/921725 co-relation queries the response was YES. [2024-06-27 20:34:16,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87141 conditions, 8968 events. 5899/8968 cut-off events. For 921717/921725 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 52840 event pairs, 1306 based on Foata normal form. 12/8979 useless extension candidates. Maximal degree in co-relation 87012. Up to 7527 conditions per place. [2024-06-27 20:34:16,171 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 340 selfloop transitions, 135 changer transitions 0/478 dead transitions. [2024-06-27 20:34:16,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 478 transitions, 8835 flow [2024-06-27 20:34:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:34:16,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:34:16,173 INFO L175 Difference]: Start difference. First operand has 259 places, 429 transitions, 7037 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:34:16,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 478 transitions, 8835 flow [2024-06-27 20:34:18,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 478 transitions, 8469 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:18,309 INFO L231 Difference]: Finished difference. Result has 262 places, 447 transitions, 7350 flow [2024-06-27 20:34:18,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6671, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7350, PETRI_PLACES=262, PETRI_TRANSITIONS=447} [2024-06-27 20:34:18,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 20:34:18,310 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 447 transitions, 7350 flow [2024-06-27 20:34:18,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:18,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:18,310 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 20:34:18,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:34:18,310 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:18,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:18,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1719585504, now seen corresponding path program 1 times [2024-06-27 20:34:18,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:18,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739437162] [2024-06-27 20:34:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:18,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:18,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:18,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739437162] [2024-06-27 20:34:18,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739437162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:18,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:18,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:18,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554913358] [2024-06-27 20:34:18,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:18,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:18,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:18,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:18,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 447 transitions, 7350 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:18,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:18,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:18,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:20,585 INFO L124 PetriNetUnfolderBase]: 5775/8851 cut-off events. [2024-06-27 20:34:20,585 INFO L125 PetriNetUnfolderBase]: For 958838/958840 co-relation queries the response was YES. [2024-06-27 20:34:20,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87438 conditions, 8851 events. 5775/8851 cut-off events. For 958838/958840 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52766 event pairs, 1285 based on Foata normal form. 20/8870 useless extension candidates. Maximal degree in co-relation 87306. Up to 7630 conditions per place. [2024-06-27 20:34:20,707 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 328 selfloop transitions, 135 changer transitions 0/480 dead transitions. [2024-06-27 20:34:20,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 480 transitions, 8842 flow [2024-06-27 20:34:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:34:20,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:34:20,708 INFO L175 Difference]: Start difference. First operand has 262 places, 447 transitions, 7350 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:34:20,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 480 transitions, 8842 flow [2024-06-27 20:34:22,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 480 transitions, 8701 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-27 20:34:22,693 INFO L231 Difference]: Finished difference. Result has 267 places, 457 transitions, 7720 flow [2024-06-27 20:34:22,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7209, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7720, PETRI_PLACES=267, PETRI_TRANSITIONS=457} [2024-06-27 20:34:22,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-27 20:34:22,693 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 457 transitions, 7720 flow [2024-06-27 20:34:22,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:22,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:22,694 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 20:34:22,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:34:22,694 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:22,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1550530390, now seen corresponding path program 2 times [2024-06-27 20:34:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:22,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402211342] [2024-06-27 20:34:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:22,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:23,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:23,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402211342] [2024-06-27 20:34:23,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402211342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:23,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:23,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:23,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244659993] [2024-06-27 20:34:23,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:23,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:23,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:23,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:23,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:23,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:23,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 457 transitions, 7720 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:23,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:23,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:23,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:25,220 INFO L124 PetriNetUnfolderBase]: 5710/8749 cut-off events. [2024-06-27 20:34:25,220 INFO L125 PetriNetUnfolderBase]: For 940184/940186 co-relation queries the response was YES. [2024-06-27 20:34:25,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87022 conditions, 8749 events. 5710/8749 cut-off events. For 940184/940186 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 51899 event pairs, 1329 based on Foata normal form. 8/8756 useless extension candidates. Maximal degree in co-relation 86887. Up to 7558 conditions per place. [2024-06-27 20:34:25,319 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 307 selfloop transitions, 151 changer transitions 0/475 dead transitions. [2024-06-27 20:34:25,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 475 transitions, 8968 flow [2024-06-27 20:34:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:34:25,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 20:34:25,320 INFO L175 Difference]: Start difference. First operand has 267 places, 457 transitions, 7720 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:34:25,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 475 transitions, 8968 flow [2024-06-27 20:34:26,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 475 transitions, 8741 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:26,793 INFO L231 Difference]: Finished difference. Result has 270 places, 457 transitions, 7810 flow [2024-06-27 20:34:26,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7493, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7810, PETRI_PLACES=270, PETRI_TRANSITIONS=457} [2024-06-27 20:34:26,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 20:34:26,794 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 457 transitions, 7810 flow [2024-06-27 20:34:26,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:26,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:26,794 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 20:34:26,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:34:26,794 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 20:34:26,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:26,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1523245435, now seen corresponding path program 1 times [2024-06-27 20:34:26,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:26,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3250284] [2024-06-27 20:34:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:26,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:27,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:27,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3250284] [2024-06-27 20:34:27,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3250284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:27,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:34:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471101594] [2024-06-27 20:34:27,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:27,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:34:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:34:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:34:28,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:28,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 457 transitions, 7810 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:28,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:28,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:28,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:30,225 INFO L124 PetriNetUnfolderBase]: 5778/8869 cut-off events. [2024-06-27 20:34:30,225 INFO L125 PetriNetUnfolderBase]: For 1014670/1014672 co-relation queries the response was YES. [2024-06-27 20:34:30,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88720 conditions, 8869 events. 5778/8869 cut-off events. For 1014670/1014672 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 53012 event pairs, 1252 based on Foata normal form. 18/8886 useless extension candidates. Maximal degree in co-relation 88584. Up to 7421 conditions per place. [2024-06-27 20:34:30,367 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 179 changer transitions 0/497 dead transitions. [2024-06-27 20:34:30,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 497 transitions, 9177 flow [2024-06-27 20:34:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:34:30,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 20:34:30,368 INFO L175 Difference]: Start difference. First operand has 270 places, 457 transitions, 7810 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:34:30,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 497 transitions, 9177 flow [2024-06-27 20:34:32,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 497 transitions, 8934 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:32,242 INFO L231 Difference]: Finished difference. Result has 275 places, 459 transitions, 8073 flow [2024-06-27 20:34:32,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7567, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8073, PETRI_PLACES=275, PETRI_TRANSITIONS=459} [2024-06-27 20:34:32,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 20:34:32,243 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 459 transitions, 8073 flow [2024-06-27 20:34:32,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:32,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:32,243 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 20:34:32,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:34:32,243 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 20:34:32,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:32,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1013079291, now seen corresponding path program 2 times [2024-06-27 20:34:32,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:32,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555752474] [2024-06-27 20:34:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:32,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:33,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:33,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555752474] [2024-06-27 20:34:33,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555752474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:33,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:33,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:34:33,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095628917] [2024-06-27 20:34:33,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:33,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:34:33,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:34:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:34:33,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:33,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 459 transitions, 8073 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:33,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:33,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:33,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:35,265 INFO L124 PetriNetUnfolderBase]: 5846/8987 cut-off events. [2024-06-27 20:34:35,265 INFO L125 PetriNetUnfolderBase]: For 1049882/1049884 co-relation queries the response was YES. [2024-06-27 20:34:35,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90810 conditions, 8987 events. 5846/8987 cut-off events. For 1049882/1049884 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 54042 event pairs, 1273 based on Foata normal form. 18/9004 useless extension candidates. Maximal degree in co-relation 90673. Up to 7166 conditions per place. [2024-06-27 20:34:35,387 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 213 changer transitions 0/498 dead transitions. [2024-06-27 20:34:35,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 498 transitions, 9438 flow [2024-06-27 20:34:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:34:35,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 20:34:35,388 INFO L175 Difference]: Start difference. First operand has 275 places, 459 transitions, 8073 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:34:35,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 498 transitions, 9438 flow [2024-06-27 20:34:37,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 498 transitions, 8963 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:37,503 INFO L231 Difference]: Finished difference. Result has 277 places, 461 transitions, 8176 flow [2024-06-27 20:34:37,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7598, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8176, PETRI_PLACES=277, PETRI_TRANSITIONS=461} [2024-06-27 20:34:37,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 20:34:37,504 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 461 transitions, 8176 flow [2024-06-27 20:34:37,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:37,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:37,504 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 20:34:37,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:34:37,504 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 20:34:37,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash -589150155, now seen corresponding path program 2 times [2024-06-27 20:34:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:37,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328497831] [2024-06-27 20:34:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:38,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:38,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328497831] [2024-06-27 20:34:38,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328497831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:38,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:38,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:38,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295960020] [2024-06-27 20:34:38,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:38,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:38,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:38,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:38,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:38,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:38,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 461 transitions, 8176 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:38,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:38,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:38,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:39,960 INFO L124 PetriNetUnfolderBase]: 6066/9242 cut-off events. [2024-06-27 20:34:39,960 INFO L125 PetriNetUnfolderBase]: For 1072548/1072550 co-relation queries the response was YES. [2024-06-27 20:34:40,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93381 conditions, 9242 events. 6066/9242 cut-off events. For 1072548/1072550 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54877 event pairs, 1395 based on Foata normal form. 6/9247 useless extension candidates. Maximal degree in co-relation 93243. Up to 7782 conditions per place. [2024-06-27 20:34:40,091 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 332 selfloop transitions, 164 changer transitions 0/499 dead transitions. [2024-06-27 20:34:40,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 499 transitions, 10132 flow [2024-06-27 20:34:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:34:40,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:34:40,092 INFO L175 Difference]: Start difference. First operand has 277 places, 461 transitions, 8176 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:34:40,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 499 transitions, 10132 flow [2024-06-27 20:34:42,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 499 transitions, 9585 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:42,816 INFO L231 Difference]: Finished difference. Result has 279 places, 474 transitions, 8265 flow [2024-06-27 20:34:42,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7629, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8265, PETRI_PLACES=279, PETRI_TRANSITIONS=474} [2024-06-27 20:34:42,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 20:34:42,817 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 474 transitions, 8265 flow [2024-06-27 20:34:42,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:42,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:42,817 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 20:34:42,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:34:42,817 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 20:34:42,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:42,817 INFO L85 PathProgramCache]: Analyzing trace with hash -589161315, now seen corresponding path program 3 times [2024-06-27 20:34:42,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:42,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067515472] [2024-06-27 20:34:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:42,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067515472] [2024-06-27 20:34:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067515472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:43,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:43,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:43,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189007888] [2024-06-27 20:34:43,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:43,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:43,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 474 transitions, 8265 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:43,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:43,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:43,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:45,256 INFO L124 PetriNetUnfolderBase]: 6060/9235 cut-off events. [2024-06-27 20:34:45,256 INFO L125 PetriNetUnfolderBase]: For 1073124/1073126 co-relation queries the response was YES. [2024-06-27 20:34:45,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92543 conditions, 9235 events. 6060/9235 cut-off events. For 1073124/1073126 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54858 event pairs, 1419 based on Foata normal form. 6/9240 useless extension candidates. Maximal degree in co-relation 92403. Up to 7780 conditions per place. [2024-06-27 20:34:45,385 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 339 selfloop transitions, 157 changer transitions 0/499 dead transitions. [2024-06-27 20:34:45,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 499 transitions, 9865 flow [2024-06-27 20:34:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:34:45,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:34:45,386 INFO L175 Difference]: Start difference. First operand has 279 places, 474 transitions, 8265 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:34:45,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 499 transitions, 9865 flow [2024-06-27 20:34:47,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 499 transitions, 9506 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:47,944 INFO L231 Difference]: Finished difference. Result has 283 places, 476 transitions, 8292 flow [2024-06-27 20:34:47,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7930, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8292, PETRI_PLACES=283, PETRI_TRANSITIONS=476} [2024-06-27 20:34:47,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 20:34:47,944 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 476 transitions, 8292 flow [2024-06-27 20:34:47,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:47,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:47,945 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 20:34:47,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:34:47,945 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 20:34:47,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash -265418590, now seen corresponding path program 2 times [2024-06-27 20:34:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:47,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177633581] [2024-06-27 20:34:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:48,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:48,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177633581] [2024-06-27 20:34:48,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177633581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:48,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:48,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:48,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047495869] [2024-06-27 20:34:48,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:48,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:48,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:48,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:48,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:48,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 476 transitions, 8292 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:48,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:48,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:48,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:50,729 INFO L124 PetriNetUnfolderBase]: 5976/9162 cut-off events. [2024-06-27 20:34:50,729 INFO L125 PetriNetUnfolderBase]: For 1100636/1100638 co-relation queries the response was YES. [2024-06-27 20:34:50,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92407 conditions, 9162 events. 5976/9162 cut-off events. For 1100636/1100638 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 54933 event pairs, 1375 based on Foata normal form. 6/9167 useless extension candidates. Maximal degree in co-relation 92266. Up to 7894 conditions per place. [2024-06-27 20:34:50,858 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 325 selfloop transitions, 157 changer transitions 0/502 dead transitions. [2024-06-27 20:34:50,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 502 transitions, 9726 flow [2024-06-27 20:34:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:34:50,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:34:50,860 INFO L175 Difference]: Start difference. First operand has 283 places, 476 transitions, 8292 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:34:50,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 502 transitions, 9726 flow [2024-06-27 20:34:52,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 502 transitions, 9538 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:52,834 INFO L231 Difference]: Finished difference. Result has 287 places, 481 transitions, 8542 flow [2024-06-27 20:34:52,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8104, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8542, PETRI_PLACES=287, PETRI_TRANSITIONS=481} [2024-06-27 20:34:52,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 20:34:52,834 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 481 transitions, 8542 flow [2024-06-27 20:34:52,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:52,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:52,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:34:52,835 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 20:34:52,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1725307360, now seen corresponding path program 1 times [2024-06-27 20:34:52,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:52,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657960198] [2024-06-27 20:34:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:52,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657960198] [2024-06-27 20:34:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657960198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884178310] [2024-06-27 20:34:53,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:53,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:53,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:53,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 481 transitions, 8542 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:53,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:53,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:53,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:55,338 INFO L124 PetriNetUnfolderBase]: 6117/9304 cut-off events. [2024-06-27 20:34:55,338 INFO L125 PetriNetUnfolderBase]: For 1132178/1132184 co-relation queries the response was YES. [2024-06-27 20:34:55,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94153 conditions, 9304 events. 6117/9304 cut-off events. For 1132178/1132184 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 55134 event pairs, 1507 based on Foata normal form. 9/9312 useless extension candidates. Maximal degree in co-relation 94011. Up to 9200 conditions per place. [2024-06-27 20:34:55,470 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 35 changer transitions 0/512 dead transitions. [2024-06-27 20:34:55,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 512 transitions, 9896 flow [2024-06-27 20:34:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:34:55,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:34:55,471 INFO L175 Difference]: Start difference. First operand has 287 places, 481 transitions, 8542 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:34:55,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 512 transitions, 9896 flow [2024-06-27 20:34:57,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 512 transitions, 9604 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:57,915 INFO L231 Difference]: Finished difference. Result has 291 places, 490 transitions, 8471 flow [2024-06-27 20:34:57,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8471, PETRI_PLACES=291, PETRI_TRANSITIONS=490} [2024-06-27 20:34:57,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 20:34:57,915 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 490 transitions, 8471 flow [2024-06-27 20:34:57,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:57,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:57,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:57,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:34:57,916 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 20:34:57,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1379271968, now seen corresponding path program 3 times [2024-06-27 20:34:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:57,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883054016] [2024-06-27 20:34:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:58,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883054016] [2024-06-27 20:34:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883054016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:58,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435208679] [2024-06-27 20:34:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:58,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:58,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:58,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 490 transitions, 8471 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:58,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:58,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:58,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:00,414 INFO L124 PetriNetUnfolderBase]: 5934/9102 cut-off events. [2024-06-27 20:35:00,414 INFO L125 PetriNetUnfolderBase]: For 1151111/1151111 co-relation queries the response was YES. [2024-06-27 20:35:00,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91954 conditions, 9102 events. 5934/9102 cut-off events. For 1151111/1151111 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54556 event pairs, 1627 based on Foata normal form. 6/9107 useless extension candidates. Maximal degree in co-relation 91810. Up to 8720 conditions per place. [2024-06-27 20:35:00,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 42 changer transitions 0/508 dead transitions. [2024-06-27 20:35:00,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 508 transitions, 9659 flow [2024-06-27 20:35:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:35:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:35:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:35:00,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 20:35:00,541 INFO L175 Difference]: Start difference. First operand has 291 places, 490 transitions, 8471 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:35:00,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 508 transitions, 9659 flow [2024-06-27 20:35:03,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 508 transitions, 9563 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 20:35:03,195 INFO L231 Difference]: Finished difference. Result has 295 places, 490 transitions, 8472 flow [2024-06-27 20:35:03,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8472, PETRI_PLACES=295, PETRI_TRANSITIONS=490} [2024-06-27 20:35:03,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-27 20:35:03,196 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 490 transitions, 8472 flow [2024-06-27 20:35:03,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:03,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:03,197 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 20:35:03,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:35:03,197 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 20:35:03,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:03,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1367844128, now seen corresponding path program 4 times [2024-06-27 20:35:03,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:03,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095321341] [2024-06-27 20:35:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:03,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:03,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095321341] [2024-06-27 20:35:03,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095321341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:03,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:03,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:35:03,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570229114] [2024-06-27 20:35:03,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:03,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:35:03,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:35:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:35:03,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:03,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 490 transitions, 8472 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:03,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:03,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:03,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:05,694 INFO L124 PetriNetUnfolderBase]: 5929/9091 cut-off events. [2024-06-27 20:35:05,694 INFO L125 PetriNetUnfolderBase]: For 1161551/1161551 co-relation queries the response was YES. [2024-06-27 20:35:05,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92050 conditions, 9091 events. 5929/9091 cut-off events. For 1161551/1161551 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 54465 event pairs, 1649 based on Foata normal form. 3/9093 useless extension candidates. Maximal degree in co-relation 91903. Up to 8846 conditions per place. [2024-06-27 20:35:05,819 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 24 changer transitions 0/506 dead transitions. [2024-06-27 20:35:05,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 506 transitions, 9551 flow [2024-06-27 20:35:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:35:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:35:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:35:05,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:35:05,820 INFO L175 Difference]: Start difference. First operand has 295 places, 490 transitions, 8472 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:35:05,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 506 transitions, 9551 flow [2024-06-27 20:35:08,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 506 transitions, 9306 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:08,222 INFO L231 Difference]: Finished difference. Result has 295 places, 493 transitions, 8355 flow [2024-06-27 20:35:08,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8229, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8355, PETRI_PLACES=295, PETRI_TRANSITIONS=493} [2024-06-27 20:35:08,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-27 20:35:08,223 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 493 transitions, 8355 flow [2024-06-27 20:35:08,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:08,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:08,223 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 20:35:08,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:35:08,223 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:08,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash 419777837, now seen corresponding path program 3 times [2024-06-27 20:35:08,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:08,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327799188] [2024-06-27 20:35:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:08,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:09,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:09,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327799188] [2024-06-27 20:35:09,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327799188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:09,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:09,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:09,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232727089] [2024-06-27 20:35:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:09,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:09,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:09,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:09,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 493 transitions, 8355 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:09,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:09,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:09,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:11,155 INFO L124 PetriNetUnfolderBase]: 5990/9195 cut-off events. [2024-06-27 20:35:11,155 INFO L125 PetriNetUnfolderBase]: For 1241665/1241669 co-relation queries the response was YES. [2024-06-27 20:35:11,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92890 conditions, 9195 events. 5990/9195 cut-off events. For 1241665/1241669 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 55278 event pairs, 1599 based on Foata normal form. 22/9216 useless extension candidates. Maximal degree in co-relation 92742. Up to 8762 conditions per place. [2024-06-27 20:35:11,273 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 472 selfloop transitions, 35 changer transitions 0/527 dead transitions. [2024-06-27 20:35:11,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 527 transitions, 9587 flow [2024-06-27 20:35:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:35:11,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 20:35:11,274 INFO L175 Difference]: Start difference. First operand has 295 places, 493 transitions, 8355 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:35:11,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 527 transitions, 9587 flow [2024-06-27 20:35:14,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 527 transitions, 9512 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:14,297 INFO L231 Difference]: Finished difference. Result has 298 places, 495 transitions, 8481 flow [2024-06-27 20:35:14,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8280, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8481, PETRI_PLACES=298, PETRI_TRANSITIONS=495} [2024-06-27 20:35:14,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-27 20:35:14,298 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 495 transitions, 8481 flow [2024-06-27 20:35:14,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:14,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:14,298 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 20:35:14,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:35:14,298 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:14,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1667115559, now seen corresponding path program 4 times [2024-06-27 20:35:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:14,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8142416] [2024-06-27 20:35:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:15,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8142416] [2024-06-27 20:35:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8142416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:15,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:15,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877346305] [2024-06-27 20:35:15,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:15,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:15,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:15,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 495 transitions, 8481 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:15,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:15,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:15,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:17,401 INFO L124 PetriNetUnfolderBase]: 6051/9301 cut-off events. [2024-06-27 20:35:17,401 INFO L125 PetriNetUnfolderBase]: For 1299368/1299372 co-relation queries the response was YES. [2024-06-27 20:35:17,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93675 conditions, 9301 events. 6051/9301 cut-off events. For 1299368/1299372 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 56258 event pairs, 1614 based on Foata normal form. 40/9340 useless extension candidates. Maximal degree in co-relation 93526. Up to 8595 conditions per place. [2024-06-27 20:35:17,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 62 changer transitions 0/531 dead transitions. [2024-06-27 20:35:17,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 531 transitions, 9788 flow [2024-06-27 20:35:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:35:17,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:35:17,529 INFO L175 Difference]: Start difference. First operand has 298 places, 495 transitions, 8481 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:35:17,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 531 transitions, 9788 flow [2024-06-27 20:35:20,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 531 transitions, 9611 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:20,249 INFO L231 Difference]: Finished difference. Result has 300 places, 498 transitions, 8620 flow [2024-06-27 20:35:20,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8620, PETRI_PLACES=300, PETRI_TRANSITIONS=498} [2024-06-27 20:35:20,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 20:35:20,249 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 498 transitions, 8620 flow [2024-06-27 20:35:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:20,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:20,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:20,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:35:20,250 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:20,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1028466137, now seen corresponding path program 5 times [2024-06-27 20:35:20,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:20,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047140169] [2024-06-27 20:35:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:20,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:21,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:21,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047140169] [2024-06-27 20:35:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047140169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:21,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:21,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:21,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891993170] [2024-06-27 20:35:21,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:21,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:21,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:21,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:21,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 498 transitions, 8620 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:21,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:21,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:21,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:23,277 INFO L124 PetriNetUnfolderBase]: 6051/9299 cut-off events. [2024-06-27 20:35:23,277 INFO L125 PetriNetUnfolderBase]: For 1258690/1258694 co-relation queries the response was YES. [2024-06-27 20:35:23,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92828 conditions, 9299 events. 6051/9299 cut-off events. For 1258690/1258694 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 56180 event pairs, 1607 based on Foata normal form. 22/9320 useless extension candidates. Maximal degree in co-relation 92678. Up to 8708 conditions per place. [2024-06-27 20:35:23,413 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 53 changer transitions 0/535 dead transitions. [2024-06-27 20:35:23,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 535 transitions, 9908 flow [2024-06-27 20:35:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:35:23,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:35:23,414 INFO L175 Difference]: Start difference. First operand has 300 places, 498 transitions, 8620 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:35:23,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 535 transitions, 9908 flow [2024-06-27 20:35:26,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 535 transitions, 9631 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:26,264 INFO L231 Difference]: Finished difference. Result has 302 places, 501 transitions, 8605 flow [2024-06-27 20:35:26,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8605, PETRI_PLACES=302, PETRI_TRANSITIONS=501} [2024-06-27 20:35:26,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 20:35:26,264 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 501 transitions, 8605 flow [2024-06-27 20:35:26,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:26,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:26,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:26,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:35:26,265 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:26,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1028459627, now seen corresponding path program 6 times [2024-06-27 20:35:26,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:26,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890557241] [2024-06-27 20:35:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:26,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:27,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890557241] [2024-06-27 20:35:27,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890557241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:27,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:27,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:27,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674698864] [2024-06-27 20:35:27,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:27,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:27,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:27,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:27,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 501 transitions, 8605 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:27,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:27,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:27,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:29,170 INFO L124 PetriNetUnfolderBase]: 6051/9299 cut-off events. [2024-06-27 20:35:29,170 INFO L125 PetriNetUnfolderBase]: For 1237007/1237011 co-relation queries the response was YES. [2024-06-27 20:35:29,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90541 conditions, 9299 events. 6051/9299 cut-off events. For 1237007/1237011 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 56130 event pairs, 1603 based on Foata normal form. 28/9326 useless extension candidates. Maximal degree in co-relation 90390. Up to 8610 conditions per place. [2024-06-27 20:35:29,299 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 462 selfloop transitions, 55 changer transitions 0/537 dead transitions. [2024-06-27 20:35:29,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 537 transitions, 9698 flow [2024-06-27 20:35:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:35:29,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:35:29,300 INFO L175 Difference]: Start difference. First operand has 302 places, 501 transitions, 8605 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:35:29,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 537 transitions, 9698 flow [2024-06-27 20:35:31,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 537 transitions, 9468 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:31,828 INFO L231 Difference]: Finished difference. Result has 303 places, 501 transitions, 8412 flow [2024-06-27 20:35:31,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8263, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8412, PETRI_PLACES=303, PETRI_TRANSITIONS=501} [2024-06-27 20:35:31,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-27 20:35:31,829 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 501 transitions, 8412 flow [2024-06-27 20:35:31,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:31,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:31,829 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 20:35:31,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:35:31,829 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 20:35:31,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:31,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1395801858, now seen corresponding path program 5 times [2024-06-27 20:35:31,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:31,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765386391] [2024-06-27 20:35:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:31,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:32,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765386391] [2024-06-27 20:35:32,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765386391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:32,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:32,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:35:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101007430] [2024-06-27 20:35:32,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:32,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:35:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:35:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:35:32,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:32,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 501 transitions, 8412 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:32,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:32,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:32,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:34,256 INFO L124 PetriNetUnfolderBase]: 6031/9269 cut-off events. [2024-06-27 20:35:34,257 INFO L125 PetriNetUnfolderBase]: For 1183327/1183329 co-relation queries the response was YES. [2024-06-27 20:35:34,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89748 conditions, 9269 events. 6031/9269 cut-off events. For 1183327/1183329 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 55880 event pairs, 1658 based on Foata normal form. 4/9272 useless extension candidates. Maximal degree in co-relation 89596. Up to 8990 conditions per place. [2024-06-27 20:35:34,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 36 changer transitions 0/512 dead transitions. [2024-06-27 20:35:34,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 512 transitions, 9592 flow [2024-06-27 20:35:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:35:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:35:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:35:34,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:35:34,390 INFO L175 Difference]: Start difference. First operand has 303 places, 501 transitions, 8412 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:35:34,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 512 transitions, 9592 flow [2024-06-27 20:35:37,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 512 transitions, 9283 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-27 20:35:37,496 INFO L231 Difference]: Finished difference. Result has 301 places, 501 transitions, 8183 flow [2024-06-27 20:35:37,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8103, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8183, PETRI_PLACES=301, PETRI_TRANSITIONS=501} [2024-06-27 20:35:37,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 20:35:37,497 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 501 transitions, 8183 flow [2024-06-27 20:35:37,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:37,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:37,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:35:37,498 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 20:35:37,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1143247726, now seen corresponding path program 6 times [2024-06-27 20:35:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:37,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43753359] [2024-06-27 20:35:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:37,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:37,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:37,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43753359] [2024-06-27 20:35:37,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43753359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:37,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:37,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:35:37,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085083247] [2024-06-27 20:35:37,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:37,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:35:37,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:35:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:35:38,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:38,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 501 transitions, 8183 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:38,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:38,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:38,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:39,929 INFO L124 PetriNetUnfolderBase]: 5947/9127 cut-off events. [2024-06-27 20:35:39,929 INFO L125 PetriNetUnfolderBase]: For 1199289/1199291 co-relation queries the response was YES. [2024-06-27 20:35:40,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87380 conditions, 9127 events. 5947/9127 cut-off events. For 1199289/1199291 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54818 event pairs, 1639 based on Foata normal form. 3/9129 useless extension candidates. Maximal degree in co-relation 87229. Up to 8886 conditions per place. [2024-06-27 20:35:40,056 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 24 changer transitions 0/510 dead transitions. [2024-06-27 20:35:40,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 510 transitions, 9187 flow [2024-06-27 20:35:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:35:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:35:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:35:40,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 20:35:40,057 INFO L175 Difference]: Start difference. First operand has 301 places, 501 transitions, 8183 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:35:40,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 510 transitions, 9187 flow [2024-06-27 20:35:42,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 510 transitions, 9037 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:42,427 INFO L231 Difference]: Finished difference. Result has 302 places, 501 transitions, 8087 flow [2024-06-27 20:35:42,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8033, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8087, PETRI_PLACES=302, PETRI_TRANSITIONS=501} [2024-06-27 20:35:42,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 20:35:42,427 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 501 transitions, 8087 flow [2024-06-27 20:35:42,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:42,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:42,428 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 20:35:42,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:35:42,428 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:42,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2022638794, now seen corresponding path program 2 times [2024-06-27 20:35:42,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:42,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868442815] [2024-06-27 20:35:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:43,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:43,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868442815] [2024-06-27 20:35:43,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868442815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:43,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:43,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:43,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134397486] [2024-06-27 20:35:43,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:43,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:43,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:43,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:43,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:43,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:43,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 501 transitions, 8087 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:43,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:43,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:43,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:44,960 INFO L124 PetriNetUnfolderBase]: 6103/9296 cut-off events. [2024-06-27 20:35:44,960 INFO L125 PetriNetUnfolderBase]: For 1215624/1215624 co-relation queries the response was YES. [2024-06-27 20:35:45,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88565 conditions, 9296 events. 6103/9296 cut-off events. For 1215624/1215624 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 55215 event pairs, 1679 based on Foata normal form. 3/9298 useless extension candidates. Maximal degree in co-relation 88413. Up to 9231 conditions per place. [2024-06-27 20:35:45,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 23 changer transitions 0/522 dead transitions. [2024-06-27 20:35:45,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 522 transitions, 9435 flow [2024-06-27 20:35:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:35:45,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:35:45,085 INFO L175 Difference]: Start difference. First operand has 302 places, 501 transitions, 8087 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:35:45,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 522 transitions, 9435 flow [2024-06-27 20:35:47,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 522 transitions, 9295 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:35:47,351 INFO L231 Difference]: Finished difference. Result has 301 places, 507 transitions, 8111 flow [2024-06-27 20:35:47,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7949, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8111, PETRI_PLACES=301, PETRI_TRANSITIONS=507} [2024-06-27 20:35:47,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 20:35:47,351 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 507 transitions, 8111 flow [2024-06-27 20:35:47,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:47,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:47,352 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 20:35:47,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:35:47,352 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:47,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2022639197, now seen corresponding path program 4 times [2024-06-27 20:35:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:47,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588656271] [2024-06-27 20:35:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:47,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588656271] [2024-06-27 20:35:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588656271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:47,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:47,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392844564] [2024-06-27 20:35:47,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:48,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:48,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 507 transitions, 8111 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:48,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:48,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:48,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:50,018 INFO L124 PetriNetUnfolderBase]: 6161/9379 cut-off events. [2024-06-27 20:35:50,018 INFO L125 PetriNetUnfolderBase]: For 1232535/1232537 co-relation queries the response was YES. [2024-06-27 20:35:50,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89644 conditions, 9379 events. 6161/9379 cut-off events. For 1232535/1232537 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 55757 event pairs, 1690 based on Foata normal form. 6/9384 useless extension candidates. Maximal degree in co-relation 89491. Up to 9243 conditions per place. [2024-06-27 20:35:50,143 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 483 selfloop transitions, 46 changer transitions 0/532 dead transitions. [2024-06-27 20:35:50,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 532 transitions, 9789 flow [2024-06-27 20:35:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:35:50,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:35:50,144 INFO L175 Difference]: Start difference. First operand has 301 places, 507 transitions, 8111 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:35:50,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 532 transitions, 9789 flow [2024-06-27 20:35:52,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 532 transitions, 9729 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 20:35:52,548 INFO L231 Difference]: Finished difference. Result has 307 places, 518 transitions, 8428 flow [2024-06-27 20:35:52,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8051, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8428, PETRI_PLACES=307, PETRI_TRANSITIONS=518} [2024-06-27 20:35:52,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 20:35:52,548 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 518 transitions, 8428 flow [2024-06-27 20:35:52,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:52,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:52,548 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 20:35:52,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:35:52,549 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:52,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2022193324, now seen corresponding path program 3 times [2024-06-27 20:35:52,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:52,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039489723] [2024-06-27 20:35:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:52,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:53,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:53,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039489723] [2024-06-27 20:35:53,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039489723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:53,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:53,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:53,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405200033] [2024-06-27 20:35:53,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:53,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:53,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:53,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:53,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 518 transitions, 8428 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:53,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:53,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:53,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:55,225 INFO L124 PetriNetUnfolderBase]: 6152/9365 cut-off events. [2024-06-27 20:35:55,226 INFO L125 PetriNetUnfolderBase]: For 1248458/1248458 co-relation queries the response was YES. [2024-06-27 20:35:55,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89904 conditions, 9365 events. 6152/9365 cut-off events. For 1248458/1248458 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 55657 event pairs, 1681 based on Foata normal form. 3/9367 useless extension candidates. Maximal degree in co-relation 89749. Up to 9317 conditions per place. [2024-06-27 20:35:55,347 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 18 changer transitions 0/530 dead transitions. [2024-06-27 20:35:55,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 530 transitions, 9514 flow [2024-06-27 20:35:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 20:35:55,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-27 20:35:55,348 INFO L175 Difference]: Start difference. First operand has 307 places, 518 transitions, 8428 flow. Second operand 8 states and 121 transitions. [2024-06-27 20:35:55,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 530 transitions, 9514 flow [2024-06-27 20:35:57,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 530 transitions, 9306 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-27 20:35:57,180 INFO L231 Difference]: Finished difference. Result has 312 places, 518 transitions, 8262 flow [2024-06-27 20:35:57,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8220, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8262, PETRI_PLACES=312, PETRI_TRANSITIONS=518} [2024-06-27 20:35:57,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 20:35:57,181 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 518 transitions, 8262 flow [2024-06-27 20:35:57,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:57,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:57,181 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 20:35:57,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:35:57,181 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:57,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:57,181 INFO L85 PathProgramCache]: Analyzing trace with hash -177451851, now seen corresponding path program 5 times [2024-06-27 20:35:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:57,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970200389] [2024-06-27 20:35:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:57,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:57,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:57,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970200389] [2024-06-27 20:35:57,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970200389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:57,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:57,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:57,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854185700] [2024-06-27 20:35:57,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:57,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:57,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:57,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:57,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 518 transitions, 8262 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:57,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:57,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:57,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:59,934 INFO L124 PetriNetUnfolderBase]: 6204/9439 cut-off events. [2024-06-27 20:35:59,935 INFO L125 PetriNetUnfolderBase]: For 1292286/1292288 co-relation queries the response was YES. [2024-06-27 20:36:00,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90801 conditions, 9439 events. 6204/9439 cut-off events. For 1292286/1292288 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 56121 event pairs, 1686 based on Foata normal form. 6/9444 useless extension candidates. Maximal degree in co-relation 90644. Up to 9195 conditions per place. [2024-06-27 20:36:00,060 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 471 selfloop transitions, 74 changer transitions 0/548 dead transitions. [2024-06-27 20:36:00,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 548 transitions, 10269 flow [2024-06-27 20:36:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:36:00,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:36:00,061 INFO L175 Difference]: Start difference. First operand has 312 places, 518 transitions, 8262 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:36:00,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 548 transitions, 10269 flow [2024-06-27 20:36:01,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 548 transitions, 10224 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:36:01,866 INFO L231 Difference]: Finished difference. Result has 315 places, 532 transitions, 8780 flow [2024-06-27 20:36:01,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8780, PETRI_PLACES=315, PETRI_TRANSITIONS=532} [2024-06-27 20:36:01,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 20:36:01,866 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 532 transitions, 8780 flow [2024-06-27 20:36:01,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:01,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:01,866 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 20:36:01,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:36:01,867 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:01,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:01,867 INFO L85 PathProgramCache]: Analyzing trace with hash -177452192, now seen corresponding path program 3 times [2024-06-27 20:36:01,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:01,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886484258] [2024-06-27 20:36:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:01,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:02,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:02,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886484258] [2024-06-27 20:36:02,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886484258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:02,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104720042] [2024-06-27 20:36:02,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:02,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:02,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:36:02,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 532 transitions, 8780 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:02,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:02,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:36:02,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:04,785 INFO L124 PetriNetUnfolderBase]: 6051/9270 cut-off events. [2024-06-27 20:36:04,785 INFO L125 PetriNetUnfolderBase]: For 1309939/1309941 co-relation queries the response was YES. [2024-06-27 20:36:04,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90069 conditions, 9270 events. 6051/9270 cut-off events. For 1309939/1309941 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 55692 event pairs, 1640 based on Foata normal form. 6/9275 useless extension candidates. Maximal degree in co-relation 89909. Up to 8942 conditions per place. [2024-06-27 20:36:04,913 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 477 selfloop transitions, 43 changer transitions 0/545 dead transitions. [2024-06-27 20:36:04,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 545 transitions, 9864 flow [2024-06-27 20:36:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:36:04,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:36:04,914 INFO L175 Difference]: Start difference. First operand has 315 places, 532 transitions, 8780 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:36:04,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 545 transitions, 9864 flow [2024-06-27 20:36:06,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 545 transitions, 9642 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-27 20:36:06,969 INFO L231 Difference]: Finished difference. Result has 320 places, 532 transitions, 8652 flow [2024-06-27 20:36:06,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8558, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8652, PETRI_PLACES=320, PETRI_TRANSITIONS=532} [2024-06-27 20:36:06,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 20:36:06,970 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 532 transitions, 8652 flow [2024-06-27 20:36:06,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:06,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:06,970 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 20:36:06,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:36:06,970 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:06,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash -177440288, now seen corresponding path program 4 times [2024-06-27 20:36:06,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:06,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595176807] [2024-06-27 20:36:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:07,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:07,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595176807] [2024-06-27 20:36:07,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595176807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:07,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:07,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:07,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794076040] [2024-06-27 20:36:07,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:07,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:07,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:07,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:07,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:07,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 532 transitions, 8652 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:07,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:07,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:07,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:09,650 INFO L124 PetriNetUnfolderBase]: 6166/9380 cut-off events. [2024-06-27 20:36:09,650 INFO L125 PetriNetUnfolderBase]: For 1315215/1315215 co-relation queries the response was YES. [2024-06-27 20:36:09,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90485 conditions, 9380 events. 6166/9380 cut-off events. For 1315215/1315215 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 55722 event pairs, 1685 based on Foata normal form. 3/9382 useless extension candidates. Maximal degree in co-relation 90323. Up to 9305 conditions per place. [2024-06-27 20:36:09,775 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 513 selfloop transitions, 30 changer transitions 0/546 dead transitions. [2024-06-27 20:36:09,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 546 transitions, 9776 flow [2024-06-27 20:36:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:36:09,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 20:36:09,776 INFO L175 Difference]: Start difference. First operand has 320 places, 532 transitions, 8652 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:36:09,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 546 transitions, 9776 flow [2024-06-27 20:36:12,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 546 transitions, 9585 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:36:12,018 INFO L231 Difference]: Finished difference. Result has 322 places, 532 transitions, 8527 flow [2024-06-27 20:36:12,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8461, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8527, PETRI_PLACES=322, PETRI_TRANSITIONS=532} [2024-06-27 20:36:12,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 20:36:12,019 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 532 transitions, 8527 flow [2024-06-27 20:36:12,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:12,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:12,019 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 20:36:12,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:36:12,019 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 20:36:12,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2035526207, now seen corresponding path program 6 times [2024-06-27 20:36:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:12,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577438492] [2024-06-27 20:36:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:12,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:12,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577438492] [2024-06-27 20:36:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577438492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:12,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028273942] [2024-06-27 20:36:12,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:12,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:12,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:12,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:12,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:12,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:12,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 532 transitions, 8527 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:12,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:12,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:12,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:14,757 INFO L124 PetriNetUnfolderBase]: 6160/9375 cut-off events. [2024-06-27 20:36:14,757 INFO L125 PetriNetUnfolderBase]: For 1331686/1331688 co-relation queries the response was YES. [2024-06-27 20:36:14,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90035 conditions, 9375 events. 6160/9375 cut-off events. For 1331686/1331688 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55741 event pairs, 1681 based on Foata normal form. 6/9380 useless extension candidates. Maximal degree in co-relation 89872. Up to 9136 conditions per place. [2024-06-27 20:36:14,880 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 476 selfloop transitions, 69 changer transitions 0/548 dead transitions. [2024-06-27 20:36:14,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 548 transitions, 10195 flow [2024-06-27 20:36:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:36:14,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:36:14,882 INFO L175 Difference]: Start difference. First operand has 322 places, 532 transitions, 8527 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:36:14,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 548 transitions, 10195 flow [2024-06-27 20:36:17,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 548 transitions, 10033 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:36:17,571 INFO L231 Difference]: Finished difference. Result has 322 places, 532 transitions, 8512 flow [2024-06-27 20:36:17,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8365, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8512, PETRI_PLACES=322, PETRI_TRANSITIONS=532} [2024-06-27 20:36:17,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 20:36:17,571 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 532 transitions, 8512 flow [2024-06-27 20:36:17,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:17,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:17,571 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 20:36:17,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:36:17,571 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 20:36:17,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:17,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1079956505, now seen corresponding path program 1 times [2024-06-27 20:36:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:17,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395135284] [2024-06-27 20:36:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:17,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:18,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:18,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395135284] [2024-06-27 20:36:18,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395135284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:18,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:18,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:36:18,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901286712] [2024-06-27 20:36:18,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:18,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:36:18,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:36:18,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:36:18,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:18,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 532 transitions, 8512 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 20:36:18,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:18,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:18,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:20,261 INFO L124 PetriNetUnfolderBase]: 6170/9387 cut-off events. [2024-06-27 20:36:20,261 INFO L125 PetriNetUnfolderBase]: For 1352606/1352606 co-relation queries the response was YES. [2024-06-27 20:36:20,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90437 conditions, 9387 events. 6170/9387 cut-off events. For 1352606/1352606 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55774 event pairs, 1684 based on Foata normal form. 2/9388 useless extension candidates. Maximal degree in co-relation 90274. Up to 9264 conditions per place. [2024-06-27 20:36:20,391 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 504 selfloop transitions, 47 changer transitions 0/554 dead transitions. [2024-06-27 20:36:20,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 554 transitions, 9934 flow [2024-06-27 20:36:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:36:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:36:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:36:20,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:36:20,392 INFO L175 Difference]: Start difference. First operand has 322 places, 532 transitions, 8512 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:36:20,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 554 transitions, 9934 flow [2024-06-27 20:36:23,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 554 transitions, 9603 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 20:36:23,334 INFO L231 Difference]: Finished difference. Result has 320 places, 537 transitions, 8372 flow [2024-06-27 20:36:23,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8190, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8372, PETRI_PLACES=320, PETRI_TRANSITIONS=537} [2024-06-27 20:36:23,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 20:36:23,335 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 537 transitions, 8372 flow [2024-06-27 20:36:23,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 20:36:23,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:23,336 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 20:36:23,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:36:23,336 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 20:36:23,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1367830240, now seen corresponding path program 1 times [2024-06-27 20:36:23,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:23,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369414683] [2024-06-27 20:36:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:23,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:23,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369414683] [2024-06-27 20:36:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369414683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:23,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:23,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:23,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575818390] [2024-06-27 20:36:23,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:23,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:23,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:23,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 537 transitions, 8372 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:23,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:23,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:23,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:26,198 INFO L124 PetriNetUnfolderBase]: 6215/9450 cut-off events. [2024-06-27 20:36:26,198 INFO L125 PetriNetUnfolderBase]: For 1407792/1407792 co-relation queries the response was YES. [2024-06-27 20:36:26,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90249 conditions, 9450 events. 6215/9450 cut-off events. For 1407792/1407792 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 56143 event pairs, 1681 based on Foata normal form. 9/9458 useless extension candidates. Maximal degree in co-relation 90088. Up to 9205 conditions per place. [2024-06-27 20:36:26,324 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 49 changer transitions 0/566 dead transitions. [2024-06-27 20:36:26,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 566 transitions, 9894 flow [2024-06-27 20:36:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:36:26,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:36:26,325 INFO L175 Difference]: Start difference. First operand has 320 places, 537 transitions, 8372 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:36:26,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 566 transitions, 9894 flow [2024-06-27 20:36:30,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 566 transitions, 9738 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:36:30,224 INFO L231 Difference]: Finished difference. Result has 322 places, 544 transitions, 8442 flow [2024-06-27 20:36:30,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8216, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8442, PETRI_PLACES=322, PETRI_TRANSITIONS=544} [2024-06-27 20:36:30,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 20:36:30,225 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 544 transitions, 8442 flow [2024-06-27 20:36:30,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:30,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:30,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:30,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:36:30,225 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 20:36:30,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash 435381643, now seen corresponding path program 2 times [2024-06-27 20:36:30,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:30,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605684739] [2024-06-27 20:36:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605684739] [2024-06-27 20:36:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605684739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:30,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:30,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:36:30,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30975369] [2024-06-27 20:36:30,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:30,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:36:30,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:36:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:36:30,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:30,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 544 transitions, 8442 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 20:36:30,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:30,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:30,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:32,935 INFO L124 PetriNetUnfolderBase]: 6225/9464 cut-off events. [2024-06-27 20:36:32,935 INFO L125 PetriNetUnfolderBase]: For 1411069/1411069 co-relation queries the response was YES. [2024-06-27 20:36:33,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91303 conditions, 9464 events. 6225/9464 cut-off events. For 1411069/1411069 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 56167 event pairs, 1682 based on Foata normal form. 2/9465 useless extension candidates. Maximal degree in co-relation 91142. Up to 9337 conditions per place. [2024-06-27 20:36:33,066 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 512 selfloop transitions, 49 changer transitions 0/564 dead transitions. [2024-06-27 20:36:33,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 564 transitions, 9878 flow [2024-06-27 20:36:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:36:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:36:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:36:33,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:36:33,067 INFO L175 Difference]: Start difference. First operand has 322 places, 544 transitions, 8442 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:36:33,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 564 transitions, 9878 flow [2024-06-27 20:36:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 564 transitions, 9776 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:36,762 INFO L231 Difference]: Finished difference. Result has 325 places, 549 transitions, 8527 flow [2024-06-27 20:36:36,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8340, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8527, PETRI_PLACES=325, PETRI_TRANSITIONS=549} [2024-06-27 20:36:36,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-27 20:36:36,763 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 549 transitions, 8527 flow [2024-06-27 20:36:36,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 20:36:36,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:36,763 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 20:36:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:36:36,763 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 20:36:36,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1409148226, now seen corresponding path program 2 times [2024-06-27 20:36:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:36,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989583717] [2024-06-27 20:36:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:36,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:37,345 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 20:36:37,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:37,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989583717] [2024-06-27 20:36:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989583717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:37,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:37,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:37,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992025159] [2024-06-27 20:36:37,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:37,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:37,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:37,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:37,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 549 transitions, 8527 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:37,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:37,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:37,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:39,605 INFO L124 PetriNetUnfolderBase]: 6240/9487 cut-off events. [2024-06-27 20:36:39,605 INFO L125 PetriNetUnfolderBase]: For 1443832/1443834 co-relation queries the response was YES. [2024-06-27 20:36:39,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91677 conditions, 9487 events. 6240/9487 cut-off events. For 1443832/1443834 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 56341 event pairs, 1702 based on Foata normal form. 3/9489 useless extension candidates. Maximal degree in co-relation 91514. Up to 9219 conditions per place. [2024-06-27 20:36:39,735 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 508 selfloop transitions, 64 changer transitions 0/575 dead transitions. [2024-06-27 20:36:39,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 575 transitions, 10227 flow [2024-06-27 20:36:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:36:39,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:36:39,736 INFO L175 Difference]: Start difference. First operand has 325 places, 549 transitions, 8527 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:36:39,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 575 transitions, 10227 flow [2024-06-27 20:36:43,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 575 transitions, 10125 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:43,018 INFO L231 Difference]: Finished difference. Result has 329 places, 555 transitions, 8690 flow [2024-06-27 20:36:43,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8425, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8690, PETRI_PLACES=329, PETRI_TRANSITIONS=555} [2024-06-27 20:36:43,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 20:36:43,018 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 555 transitions, 8690 flow [2024-06-27 20:36:43,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:43,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:43,018 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 20:36:43,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:36:43,019 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 20:36:43,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:43,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1748278627, now seen corresponding path program 3 times [2024-06-27 20:36:43,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:43,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662394887] [2024-06-27 20:36:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:43,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662394887] [2024-06-27 20:36:43,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662394887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:43,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:43,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:36:43,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225639248] [2024-06-27 20:36:43,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:43,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:36:43,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:36:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:36:43,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:43,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 555 transitions, 8690 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 20:36:43,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:43,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:43,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:45,683 INFO L124 PetriNetUnfolderBase]: 6234/9479 cut-off events. [2024-06-27 20:36:45,684 INFO L125 PetriNetUnfolderBase]: For 1464613/1464615 co-relation queries the response was YES. [2024-06-27 20:36:45,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91934 conditions, 9479 events. 6234/9479 cut-off events. For 1464613/1464615 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 56257 event pairs, 1697 based on Foata normal form. 2/9480 useless extension candidates. Maximal degree in co-relation 91770. Up to 9353 conditions per place. [2024-06-27 20:36:45,814 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 515 selfloop transitions, 47 changer transitions 0/565 dead transitions. [2024-06-27 20:36:45,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 565 transitions, 9846 flow [2024-06-27 20:36:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:36:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:36:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:36:45,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 20:36:45,815 INFO L175 Difference]: Start difference. First operand has 329 places, 555 transitions, 8690 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:36:45,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 565 transitions, 9846 flow [2024-06-27 20:36:49,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 565 transitions, 9663 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:49,183 INFO L231 Difference]: Finished difference. Result has 332 places, 555 transitions, 8609 flow [2024-06-27 20:36:49,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8507, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8609, PETRI_PLACES=332, PETRI_TRANSITIONS=555} [2024-06-27 20:36:49,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 20:36:49,183 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 555 transitions, 8609 flow [2024-06-27 20:36:49,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 20:36:49,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:49,184 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 20:36:49,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:36:49,184 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 20:36:49,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1401529666, now seen corresponding path program 3 times [2024-06-27 20:36:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:49,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144117065] [2024-06-27 20:36:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:49,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144117065] [2024-06-27 20:36:49,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144117065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:49,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:49,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:49,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018760737] [2024-06-27 20:36:49,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:49,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:49,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:49,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:49,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:49,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:49,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 555 transitions, 8609 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:49,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:49,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:49,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:52,086 INFO L124 PetriNetUnfolderBase]: 6249/9500 cut-off events. [2024-06-27 20:36:52,086 INFO L125 PetriNetUnfolderBase]: For 1492077/1492079 co-relation queries the response was YES. [2024-06-27 20:36:52,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91973 conditions, 9500 events. 6249/9500 cut-off events. For 1492077/1492079 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 56402 event pairs, 1699 based on Foata normal form. 3/9502 useless extension candidates. Maximal degree in co-relation 91807. Up to 9224 conditions per place. [2024-06-27 20:36:52,227 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 515 selfloop transitions, 62 changer transitions 0/580 dead transitions. [2024-06-27 20:36:52,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 580 transitions, 10243 flow [2024-06-27 20:36:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:36:52,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:36:52,228 INFO L175 Difference]: Start difference. First operand has 332 places, 555 transitions, 8609 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:36:52,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 580 transitions, 10243 flow [2024-06-27 20:36:55,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 580 transitions, 10097 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:36:55,552 INFO L231 Difference]: Finished difference. Result has 333 places, 558 transitions, 8631 flow [2024-06-27 20:36:55,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8463, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8631, PETRI_PLACES=333, PETRI_TRANSITIONS=558} [2024-06-27 20:36:55,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 20:36:55,553 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 558 transitions, 8631 flow [2024-06-27 20:36:55,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:55,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:55,553 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 20:36:55,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:36:55,553 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 20:36:55,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2022454282, now seen corresponding path program 4 times [2024-06-27 20:36:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:55,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592943575] [2024-06-27 20:36:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:55,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:56,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:56,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592943575] [2024-06-27 20:36:56,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592943575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:56,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:56,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674443932] [2024-06-27 20:36:56,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:56,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:56,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:56,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:56,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:56,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:56,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 558 transitions, 8631 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:56,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:56,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:56,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:58,423 INFO L124 PetriNetUnfolderBase]: 6240/9488 cut-off events. [2024-06-27 20:36:58,423 INFO L125 PetriNetUnfolderBase]: For 1508913/1508915 co-relation queries the response was YES. [2024-06-27 20:36:58,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92024 conditions, 9488 events. 6240/9488 cut-off events. For 1508913/1508915 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 56374 event pairs, 1699 based on Foata normal form. 3/9490 useless extension candidates. Maximal degree in co-relation 91857. Up to 9220 conditions per place. [2024-06-27 20:36:58,567 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 512 selfloop transitions, 64 changer transitions 0/579 dead transitions. [2024-06-27 20:36:58,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 579 transitions, 10037 flow [2024-06-27 20:36:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:36:58,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:36:58,568 INFO L175 Difference]: Start difference. First operand has 333 places, 558 transitions, 8631 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:36:58,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 579 transitions, 10037 flow [2024-06-27 20:37:02,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 579 transitions, 9888 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:02,262 INFO L231 Difference]: Finished difference. Result has 336 places, 558 transitions, 8616 flow [2024-06-27 20:37:02,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8482, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8616, PETRI_PLACES=336, PETRI_TRANSITIONS=558} [2024-06-27 20:37:02,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 20:37:02,263 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 558 transitions, 8616 flow [2024-06-27 20:37:02,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:02,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:02,263 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 20:37:02,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:37:02,263 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 20:37:02,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1379598790, now seen corresponding path program 1 times [2024-06-27 20:37:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:02,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260670608] [2024-06-27 20:37:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:03,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260670608] [2024-06-27 20:37:03,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260670608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:03,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:03,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511468431] [2024-06-27 20:37:03,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:03,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:03,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 558 transitions, 8616 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:03,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:03,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:03,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:05,421 INFO L124 PetriNetUnfolderBase]: 6254/9565 cut-off events. [2024-06-27 20:37:05,421 INFO L125 PetriNetUnfolderBase]: For 1674643/1674651 co-relation queries the response was YES. [2024-06-27 20:37:05,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94605 conditions, 9565 events. 6254/9565 cut-off events. For 1674643/1674651 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 57584 event pairs, 1129 based on Foata normal form. 30/9594 useless extension candidates. Maximal degree in co-relation 94437. Up to 6291 conditions per place. [2024-06-27 20:37:05,568 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 383 selfloop transitions, 199 changer transitions 0/611 dead transitions. [2024-06-27 20:37:05,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 611 transitions, 10415 flow [2024-06-27 20:37:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 20:37:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-27 20:37:05,571 INFO L175 Difference]: Start difference. First operand has 336 places, 558 transitions, 8616 flow. Second operand 9 states and 190 transitions. [2024-06-27 20:37:05,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 611 transitions, 10415 flow [2024-06-27 20:37:08,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 611 transitions, 10256 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:08,793 INFO L231 Difference]: Finished difference. Result has 337 places, 563 transitions, 9067 flow [2024-06-27 20:37:08,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8457, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9067, PETRI_PLACES=337, PETRI_TRANSITIONS=563} [2024-06-27 20:37:08,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 20:37:08,795 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 563 transitions, 9067 flow [2024-06-27 20:37:08,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:08,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:08,796 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 20:37:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:37:08,796 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 20:37:08,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1649334266, now seen corresponding path program 1 times [2024-06-27 20:37:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:08,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134268393] [2024-06-27 20:37:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:09,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134268393] [2024-06-27 20:37:09,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134268393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:09,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:09,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:09,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476064123] [2024-06-27 20:37:09,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:09,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:09,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:09,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:09,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 563 transitions, 9067 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:09,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:09,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:09,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:12,063 INFO L124 PetriNetUnfolderBase]: 6410/9738 cut-off events. [2024-06-27 20:37:12,063 INFO L125 PetriNetUnfolderBase]: For 1643458/1643466 co-relation queries the response was YES. [2024-06-27 20:37:12,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97719 conditions, 9738 events. 6410/9738 cut-off events. For 1643458/1643466 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 58149 event pairs, 1378 based on Foata normal form. 12/9749 useless extension candidates. Maximal degree in co-relation 97550. Up to 7854 conditions per place. [2024-06-27 20:37:12,214 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 400 selfloop transitions, 211 changer transitions 0/614 dead transitions. [2024-06-27 20:37:12,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 614 transitions, 11229 flow [2024-06-27 20:37:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:37:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:37:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 20:37:12,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 20:37:12,215 INFO L175 Difference]: Start difference. First operand has 337 places, 563 transitions, 9067 flow. Second operand 11 states and 208 transitions. [2024-06-27 20:37:12,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 614 transitions, 11229 flow [2024-06-27 20:37:16,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 614 transitions, 10959 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:16,172 INFO L231 Difference]: Finished difference. Result has 343 places, 572 transitions, 9408 flow [2024-06-27 20:37:16,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9408, PETRI_PLACES=343, PETRI_TRANSITIONS=572} [2024-06-27 20:37:16,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-27 20:37:16,173 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 572 transitions, 9408 flow [2024-06-27 20:37:16,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:16,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:16,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:16,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:37:16,173 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 20:37:16,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:16,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1649333956, now seen corresponding path program 2 times [2024-06-27 20:37:16,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:16,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050440817] [2024-06-27 20:37:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:16,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:17,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:17,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050440817] [2024-06-27 20:37:17,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050440817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:17,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:17,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:17,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924693376] [2024-06-27 20:37:17,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:17,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:17,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:17,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:17,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 572 transitions, 9408 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:17,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:17,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:17,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:19,403 INFO L124 PetriNetUnfolderBase]: 6388/9760 cut-off events. [2024-06-27 20:37:19,404 INFO L125 PetriNetUnfolderBase]: For 1772855/1772863 co-relation queries the response was YES. [2024-06-27 20:37:19,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100114 conditions, 9760 events. 6388/9760 cut-off events. For 1772855/1772863 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 58935 event pairs, 1327 based on Foata normal form. 30/9789 useless extension candidates. Maximal degree in co-relation 99943. Up to 8112 conditions per place. [2024-06-27 20:37:19,559 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 404 selfloop transitions, 182 changer transitions 0/617 dead transitions. [2024-06-27 20:37:19,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 617 transitions, 10912 flow [2024-06-27 20:37:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:37:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:37:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:37:19,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 20:37:19,560 INFO L175 Difference]: Start difference. First operand has 343 places, 572 transitions, 9408 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:37:19,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 617 transitions, 10912 flow [2024-06-27 20:37:24,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 617 transitions, 10540 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:37:24,423 INFO L231 Difference]: Finished difference. Result has 346 places, 576 transitions, 9555 flow [2024-06-27 20:37:24,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9036, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9555, PETRI_PLACES=346, PETRI_TRANSITIONS=576} [2024-06-27 20:37:24,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 20:37:24,424 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 576 transitions, 9555 flow [2024-06-27 20:37:24,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:24,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:24,424 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 20:37:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:37:24,424 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 20:37:24,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash -831743388, now seen corresponding path program 1 times [2024-06-27 20:37:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745202275] [2024-06-27 20:37:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:25,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:25,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745202275] [2024-06-27 20:37:25,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745202275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:25,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:25,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:25,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294260836] [2024-06-27 20:37:25,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:25,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:25,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:25,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:25,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:25,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 576 transitions, 9555 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:25,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:25,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:25,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:27,494 INFO L124 PetriNetUnfolderBase]: 6750/10221 cut-off events. [2024-06-27 20:37:27,494 INFO L125 PetriNetUnfolderBase]: For 1890744/1890752 co-relation queries the response was YES. [2024-06-27 20:37:27,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107410 conditions, 10221 events. 6750/10221 cut-off events. For 1890744/1890752 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 61162 event pairs, 1449 based on Foata normal form. 20/10240 useless extension candidates. Maximal degree in co-relation 107237. Up to 8280 conditions per place. [2024-06-27 20:37:27,664 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 450 selfloop transitions, 186 changer transitions 0/639 dead transitions. [2024-06-27 20:37:27,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 639 transitions, 12005 flow [2024-06-27 20:37:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:37:27,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 20:37:27,665 INFO L175 Difference]: Start difference. First operand has 346 places, 576 transitions, 9555 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:37:27,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 639 transitions, 12005 flow [2024-06-27 20:37:32,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 639 transitions, 11594 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:32,368 INFO L231 Difference]: Finished difference. Result has 349 places, 596 transitions, 10029 flow [2024-06-27 20:37:32,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9144, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10029, PETRI_PLACES=349, PETRI_TRANSITIONS=596} [2024-06-27 20:37:32,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 20:37:32,368 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 596 transitions, 10029 flow [2024-06-27 20:37:32,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:32,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:32,369 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 20:37:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:37:32,369 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 20:37:32,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1261148782, now seen corresponding path program 1 times [2024-06-27 20:37:32,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:32,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219429875] [2024-06-27 20:37:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:33,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219429875] [2024-06-27 20:37:33,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219429875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:33,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:33,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489758846] [2024-06-27 20:37:33,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:33,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:33,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:33,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:33,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:33,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 596 transitions, 10029 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:33,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:33,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:33,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:35,469 INFO L124 PetriNetUnfolderBase]: 6804/10305 cut-off events. [2024-06-27 20:37:35,469 INFO L125 PetriNetUnfolderBase]: For 1920691/1920693 co-relation queries the response was YES. [2024-06-27 20:37:35,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110660 conditions, 10305 events. 6804/10305 cut-off events. For 1920691/1920693 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 61771 event pairs, 1453 based on Foata normal form. 8/10312 useless extension candidates. Maximal degree in co-relation 110484. Up to 8809 conditions per place. [2024-06-27 20:37:35,639 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 460 selfloop transitions, 175 changer transitions 0/638 dead transitions. [2024-06-27 20:37:35,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 638 transitions, 12138 flow [2024-06-27 20:37:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:37:35,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:37:35,640 INFO L175 Difference]: Start difference. First operand has 349 places, 596 transitions, 10029 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:37:35,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 638 transitions, 12138 flow [2024-06-27 20:37:39,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 638 transitions, 11963 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-27 20:37:39,487 INFO L231 Difference]: Finished difference. Result has 355 places, 610 transitions, 10578 flow [2024-06-27 20:37:39,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9854, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10578, PETRI_PLACES=355, PETRI_TRANSITIONS=610} [2024-06-27 20:37:39,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 20:37:39,488 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 610 transitions, 10578 flow [2024-06-27 20:37:39,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:39,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:39,488 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 20:37:39,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:37:39,488 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 20:37:39,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:39,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1944676474, now seen corresponding path program 2 times [2024-06-27 20:37:39,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:39,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296926439] [2024-06-27 20:37:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:39,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:40,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:40,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296926439] [2024-06-27 20:37:40,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296926439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:40,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:40,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:40,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749045758] [2024-06-27 20:37:40,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:40,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:40,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:40,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:40,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:40,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 610 transitions, 10578 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:40,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:40,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:40,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:42,610 INFO L124 PetriNetUnfolderBase]: 6814/10315 cut-off events. [2024-06-27 20:37:42,610 INFO L125 PetriNetUnfolderBase]: For 1935508/1935510 co-relation queries the response was YES. [2024-06-27 20:37:42,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111621 conditions, 10315 events. 6814/10315 cut-off events. For 1935508/1935510 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 61679 event pairs, 1494 based on Foata normal form. 4/10318 useless extension candidates. Maximal degree in co-relation 111441. Up to 8815 conditions per place. [2024-06-27 20:37:42,777 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 441 selfloop transitions, 191 changer transitions 0/635 dead transitions. [2024-06-27 20:37:42,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 635 transitions, 12623 flow [2024-06-27 20:37:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:37:42,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:37:42,779 INFO L175 Difference]: Start difference. First operand has 355 places, 610 transitions, 10578 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:37:42,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 635 transitions, 12623 flow [2024-06-27 20:37:48,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 635 transitions, 12385 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:48,981 INFO L231 Difference]: Finished difference. Result has 359 places, 615 transitions, 10842 flow [2024-06-27 20:37:48,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10346, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10842, PETRI_PLACES=359, PETRI_TRANSITIONS=615} [2024-06-27 20:37:48,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-27 20:37:48,982 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 615 transitions, 10842 flow [2024-06-27 20:37:48,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:48,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:48,982 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 20:37:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:37:48,982 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 20:37:48,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1944913624, now seen corresponding path program 3 times [2024-06-27 20:37:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:48,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913429159] [2024-06-27 20:37:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:49,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:49,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913429159] [2024-06-27 20:37:49,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913429159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:49,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:49,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429462032] [2024-06-27 20:37:49,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:49,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:49,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:49,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:49,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 615 transitions, 10842 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:49,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:49,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:49,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:52,566 INFO L124 PetriNetUnfolderBase]: 6808/10307 cut-off events. [2024-06-27 20:37:52,566 INFO L125 PetriNetUnfolderBase]: For 1966460/1966462 co-relation queries the response was YES. [2024-06-27 20:37:52,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111742 conditions, 10307 events. 6808/10307 cut-off events. For 1966460/1966462 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 61627 event pairs, 1490 based on Foata normal form. 4/10310 useless extension candidates. Maximal degree in co-relation 111561. Up to 8812 conditions per place. [2024-06-27 20:37:52,727 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 432 selfloop transitions, 200 changer transitions 0/635 dead transitions. [2024-06-27 20:37:52,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 635 transitions, 12584 flow [2024-06-27 20:37:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:37:52,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:37:52,728 INFO L175 Difference]: Start difference. First operand has 359 places, 615 transitions, 10842 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:37:52,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 635 transitions, 12584 flow [2024-06-27 20:37:57,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 635 transitions, 12228 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:57,921 INFO L231 Difference]: Finished difference. Result has 363 places, 615 transitions, 10896 flow [2024-06-27 20:37:57,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10486, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10896, PETRI_PLACES=363, PETRI_TRANSITIONS=615} [2024-06-27 20:37:57,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 20:37:57,922 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 615 transitions, 10896 flow [2024-06-27 20:37:57,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:57,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:57,922 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 20:37:57,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:37:57,922 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 20:37:57,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:57,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1944922118, now seen corresponding path program 2 times [2024-06-27 20:37:57,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:57,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621679909] [2024-06-27 20:37:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:57,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:58,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621679909] [2024-06-27 20:37:58,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621679909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:58,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:58,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172010682] [2024-06-27 20:37:58,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:58,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:58,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:58,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:58,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 615 transitions, 10896 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:58,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:58,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:58,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:01,658 INFO L124 PetriNetUnfolderBase]: 7126/10748 cut-off events. [2024-06-27 20:38:01,659 INFO L125 PetriNetUnfolderBase]: For 2221915/2221917 co-relation queries the response was YES. [2024-06-27 20:38:01,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119516 conditions, 10748 events. 7126/10748 cut-off events. For 2221915/2221917 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 64363 event pairs, 1502 based on Foata normal form. 14/10761 useless extension candidates. Maximal degree in co-relation 119334. Up to 8458 conditions per place. [2024-06-27 20:38:01,815 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 449 selfloop transitions, 213 changer transitions 0/665 dead transitions. [2024-06-27 20:38:01,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 665 transitions, 13557 flow [2024-06-27 20:38:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:38:01,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 20:38:01,816 INFO L175 Difference]: Start difference. First operand has 363 places, 615 transitions, 10896 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:38:01,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 665 transitions, 13557 flow [2024-06-27 20:38:05,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 665 transitions, 13189 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:38:05,388 INFO L231 Difference]: Finished difference. Result has 367 places, 628 transitions, 11301 flow [2024-06-27 20:38:05,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10528, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11301, PETRI_PLACES=367, PETRI_TRANSITIONS=628} [2024-06-27 20:38:05,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 20:38:05,389 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 628 transitions, 11301 flow [2024-06-27 20:38:05,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:05,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:05,389 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 20:38:05,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:38:05,389 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 20:38:05,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1944909656, now seen corresponding path program 2 times [2024-06-27 20:38:05,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:05,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578335076] [2024-06-27 20:38:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:06,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578335076] [2024-06-27 20:38:06,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578335076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:06,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:06,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:06,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98216343] [2024-06-27 20:38:06,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:06,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:06,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:06,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:06,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 628 transitions, 11301 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:06,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:06,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:06,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:09,314 INFO L124 PetriNetUnfolderBase]: 7152/10785 cut-off events. [2024-06-27 20:38:09,314 INFO L125 PetriNetUnfolderBase]: For 2235176/2235178 co-relation queries the response was YES. [2024-06-27 20:38:09,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121163 conditions, 10785 events. 7152/10785 cut-off events. For 2235176/2235178 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 64557 event pairs, 1546 based on Foata normal form. 6/10790 useless extension candidates. Maximal degree in co-relation 120979. Up to 9272 conditions per place. [2024-06-27 20:38:09,479 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 447 selfloop transitions, 206 changer transitions 0/656 dead transitions. [2024-06-27 20:38:09,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 656 transitions, 13209 flow [2024-06-27 20:38:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:38:09,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:38:09,480 INFO L175 Difference]: Start difference. First operand has 367 places, 628 transitions, 11301 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:38:09,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 656 transitions, 13209 flow [2024-06-27 20:38:13,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 656 transitions, 12770 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-27 20:38:13,352 INFO L231 Difference]: Finished difference. Result has 371 places, 633 transitions, 11390 flow [2024-06-27 20:38:13,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10862, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11390, PETRI_PLACES=371, PETRI_TRANSITIONS=633} [2024-06-27 20:38:13,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-27 20:38:13,352 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 633 transitions, 11390 flow [2024-06-27 20:38:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:13,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:13,353 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 20:38:13,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:38:13,353 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 20:38:13,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1944910028, now seen corresponding path program 3 times [2024-06-27 20:38:13,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:13,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960861028] [2024-06-27 20:38:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:13,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:14,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:14,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960861028] [2024-06-27 20:38:14,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960861028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:14,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:14,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:14,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962054242] [2024-06-27 20:38:14,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:14,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:14,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:14,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:14,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 633 transitions, 11390 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:14,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:14,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:14,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:17,070 INFO L124 PetriNetUnfolderBase]: 7230/10896 cut-off events. [2024-06-27 20:38:17,070 INFO L125 PetriNetUnfolderBase]: For 2318383/2318385 co-relation queries the response was YES. [2024-06-27 20:38:17,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120857 conditions, 10896 events. 7230/10896 cut-off events. For 2318383/2318385 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 65223 event pairs, 1530 based on Foata normal form. 14/10909 useless extension candidates. Maximal degree in co-relation 120672. Up to 8548 conditions per place. [2024-06-27 20:38:17,376 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 456 selfloop transitions, 217 changer transitions 0/676 dead transitions. [2024-06-27 20:38:17,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 676 transitions, 13674 flow [2024-06-27 20:38:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:38:17,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 20:38:17,377 INFO L175 Difference]: Start difference. First operand has 371 places, 633 transitions, 11390 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:38:17,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 676 transitions, 13674 flow [2024-06-27 20:38:22,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 676 transitions, 13188 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:38:22,476 INFO L231 Difference]: Finished difference. Result has 373 places, 638 transitions, 11436 flow [2024-06-27 20:38:22,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10904, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11436, PETRI_PLACES=373, PETRI_TRANSITIONS=638} [2024-06-27 20:38:22,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 20:38:22,476 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 638 transitions, 11436 flow [2024-06-27 20:38:22,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:22,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:22,476 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 20:38:22,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:38:22,477 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 20:38:22,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1944564068, now seen corresponding path program 4 times [2024-06-27 20:38:22,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:22,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604999364] [2024-06-27 20:38:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:23,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:23,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604999364] [2024-06-27 20:38:23,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604999364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:23,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:23,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:23,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272100125] [2024-06-27 20:38:23,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:23,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:23,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 638 transitions, 11436 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:23,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:23,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:23,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:26,148 INFO L124 PetriNetUnfolderBase]: 7194/10848 cut-off events. [2024-06-27 20:38:26,148 INFO L125 PetriNetUnfolderBase]: For 2291255/2291257 co-relation queries the response was YES. [2024-06-27 20:38:26,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119902 conditions, 10848 events. 7194/10848 cut-off events. For 2291255/2291257 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 64919 event pairs, 1528 based on Foata normal form. 14/10861 useless extension candidates. Maximal degree in co-relation 119716. Up to 8529 conditions per place. [2024-06-27 20:38:26,317 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 463 selfloop transitions, 211 changer transitions 0/677 dead transitions. [2024-06-27 20:38:26,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 677 transitions, 13665 flow [2024-06-27 20:38:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:38:26,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 20:38:26,318 INFO L175 Difference]: Start difference. First operand has 373 places, 638 transitions, 11436 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:38:26,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 677 transitions, 13665 flow [2024-06-27 20:38:31,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 677 transitions, 13361 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 20:38:31,528 INFO L231 Difference]: Finished difference. Result has 377 places, 640 transitions, 11614 flow [2024-06-27 20:38:31,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11132, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11614, PETRI_PLACES=377, PETRI_TRANSITIONS=640} [2024-06-27 20:38:31,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 20:38:31,529 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 640 transitions, 11614 flow [2024-06-27 20:38:31,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:31,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:31,529 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 20:38:31,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:38:31,530 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 20:38:31,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:31,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1944563696, now seen corresponding path program 3 times [2024-06-27 20:38:31,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:31,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399154802] [2024-06-27 20:38:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:31,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:32,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:32,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399154802] [2024-06-27 20:38:32,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399154802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:32,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:32,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:32,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224517826] [2024-06-27 20:38:32,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:32,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:32,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:32,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:32,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:32,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:32,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 640 transitions, 11614 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:32,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:32,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:32,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:35,303 INFO L124 PetriNetUnfolderBase]: 7214/10876 cut-off events. [2024-06-27 20:38:35,303 INFO L125 PetriNetUnfolderBase]: For 2284282/2284284 co-relation queries the response was YES. [2024-06-27 20:38:35,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120378 conditions, 10876 events. 7214/10876 cut-off events. For 2284282/2284284 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 65099 event pairs, 1549 based on Foata normal form. 6/10881 useless extension candidates. Maximal degree in co-relation 120191. Up to 9367 conditions per place. [2024-06-27 20:38:35,490 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 467 selfloop transitions, 198 changer transitions 0/668 dead transitions. [2024-06-27 20:38:35,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 668 transitions, 13568 flow [2024-06-27 20:38:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:38:35,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:38:35,492 INFO L175 Difference]: Start difference. First operand has 377 places, 640 transitions, 11614 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:38:35,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 668 transitions, 13568 flow [2024-06-27 20:38:40,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 668 transitions, 13173 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:38:40,105 INFO L231 Difference]: Finished difference. Result has 380 places, 645 transitions, 11741 flow [2024-06-27 20:38:40,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11219, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11741, PETRI_PLACES=380, PETRI_TRANSITIONS=645} [2024-06-27 20:38:40,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 20:38:40,106 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 645 transitions, 11741 flow [2024-06-27 20:38:40,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:40,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:40,106 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 20:38:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:38:40,106 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 20:38:40,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1944553466, now seen corresponding path program 4 times [2024-06-27 20:38:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:40,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133241531] [2024-06-27 20:38:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:40,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:40,999 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 20:38:40,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133241531] [2024-06-27 20:38:41,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133241531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:41,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:41,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:41,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037474079] [2024-06-27 20:38:41,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:41,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:41,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:41,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:41,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 645 transitions, 11741 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:41,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:41,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:41,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:44,005 INFO L124 PetriNetUnfolderBase]: 7234/10904 cut-off events. [2024-06-27 20:38:44,005 INFO L125 PetriNetUnfolderBase]: For 2328927/2328929 co-relation queries the response was YES. [2024-06-27 20:38:44,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120645 conditions, 10904 events. 7234/10904 cut-off events. For 2328927/2328929 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 65273 event pairs, 1536 based on Foata normal form. 6/10909 useless extension candidates. Maximal degree in co-relation 120457. Up to 9333 conditions per place. [2024-06-27 20:38:44,166 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 459 selfloop transitions, 213 changer transitions 0/675 dead transitions. [2024-06-27 20:38:44,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 675 transitions, 13733 flow [2024-06-27 20:38:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:38:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:38:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:38:44,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:38:44,167 INFO L175 Difference]: Start difference. First operand has 380 places, 645 transitions, 11741 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:38:44,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 675 transitions, 13733 flow [2024-06-27 20:38:49,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 675 transitions, 13322 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:38:49,353 INFO L231 Difference]: Finished difference. Result has 384 places, 650 transitions, 11898 flow [2024-06-27 20:38:49,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11330, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11898, PETRI_PLACES=384, PETRI_TRANSITIONS=650} [2024-06-27 20:38:49,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 20:38:49,353 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 650 transitions, 11898 flow [2024-06-27 20:38:49,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:49,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:49,353 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 20:38:49,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:38:49,354 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 20:38:49,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:49,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1944553156, now seen corresponding path program 3 times [2024-06-27 20:38:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969388033] [2024-06-27 20:38:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:50,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969388033] [2024-06-27 20:38:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969388033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:50,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:50,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938183047] [2024-06-27 20:38:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:50,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:50,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 650 transitions, 11898 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:50,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:50,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:50,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:53,324 INFO L124 PetriNetUnfolderBase]: 7187/10901 cut-off events. [2024-06-27 20:38:53,325 INFO L125 PetriNetUnfolderBase]: For 2488194/2488196 co-relation queries the response was YES. [2024-06-27 20:38:53,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121885 conditions, 10901 events. 7187/10901 cut-off events. For 2488194/2488196 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 66019 event pairs, 1491 based on Foata normal form. 24/10924 useless extension candidates. Maximal degree in co-relation 121696. Up to 9488 conditions per place. [2024-06-27 20:38:53,670 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 478 selfloop transitions, 162 changer transitions 0/680 dead transitions. [2024-06-27 20:38:53,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 680 transitions, 13474 flow [2024-06-27 20:38:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:38:53,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:38:53,671 INFO L175 Difference]: Start difference. First operand has 384 places, 650 transitions, 11898 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:38:53,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 680 transitions, 13474 flow [2024-06-27 20:38:58,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 680 transitions, 12835 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-06-27 20:38:59,007 INFO L231 Difference]: Finished difference. Result has 384 places, 654 transitions, 11746 flow [2024-06-27 20:38:59,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11259, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11746, PETRI_PLACES=384, PETRI_TRANSITIONS=654} [2024-06-27 20:38:59,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 20:38:59,007 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 654 transitions, 11746 flow [2024-06-27 20:38:59,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:59,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:59,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:59,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:38:59,008 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 20:38:59,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash -623998854, now seen corresponding path program 4 times [2024-06-27 20:38:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:59,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245686066] [2024-06-27 20:38:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245686066] [2024-06-27 20:38:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245686066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:59,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:59,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342321049] [2024-06-27 20:38:59,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:59,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:59,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:59,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:59,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 654 transitions, 11746 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:59,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:59,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:59,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:02,709 INFO L124 PetriNetUnfolderBase]: 7275/10973 cut-off events. [2024-06-27 20:39:02,709 INFO L125 PetriNetUnfolderBase]: For 2348653/2348653 co-relation queries the response was YES. [2024-06-27 20:39:02,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121642 conditions, 10973 events. 7275/10973 cut-off events. For 2348653/2348653 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 65976 event pairs, 1856 based on Foata normal form. 3/10975 useless extension candidates. Maximal degree in co-relation 121452. Up to 10655 conditions per place. [2024-06-27 20:39:02,897 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 608 selfloop transitions, 65 changer transitions 0/676 dead transitions. [2024-06-27 20:39:02,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 676 transitions, 13416 flow [2024-06-27 20:39:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:39:02,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:39:02,898 INFO L175 Difference]: Start difference. First operand has 384 places, 654 transitions, 11746 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:39:02,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 676 transitions, 13416 flow [2024-06-27 20:39:07,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 676 transitions, 13013 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:39:07,842 INFO L231 Difference]: Finished difference. Result has 385 places, 654 transitions, 11481 flow [2024-06-27 20:39:07,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11343, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11481, PETRI_PLACES=385, PETRI_TRANSITIONS=654} [2024-06-27 20:39:07,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 20:39:07,843 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 654 transitions, 11481 flow [2024-06-27 20:39:07,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:07,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:07,843 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 20:39:07,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:39:07,843 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 20:39:07,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash 611922836, now seen corresponding path program 5 times [2024-06-27 20:39:07,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:07,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478355092] [2024-06-27 20:39:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:07,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:08,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:08,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478355092] [2024-06-27 20:39:08,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478355092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:08,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:08,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684418945] [2024-06-27 20:39:08,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:08,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:08,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:08,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 654 transitions, 11481 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:08,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:08,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:08,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand