./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_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/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe031_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe031_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-eb4cb34-m [2024-06-21 17:57:58,016 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:57:58,096 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:57:58,102 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:57:58,103 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:57:58,135 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:57:58,135 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:57:58,136 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:57:58,136 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:57:58,140 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:57:58,140 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:57:58,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:57:58,142 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:57:58,143 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:57:58,143 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:57:58,144 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:57:58,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:57:58,144 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:57:58,144 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:57:58,145 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:57:58,145 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:57:58,145 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:57:58,146 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:57:58,146 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:57:58,146 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:57:58,146 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:57:58,147 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:57:58,147 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:57:58,148 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:57:58,148 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:57:58,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:57:58,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:57:58,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:57:58,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:57:58,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:57:58,150 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:57:58,150 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:57:58,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:57:58,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:57:58,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:57:58,151 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:57:58,152 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:57:58,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:57:58,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:57:58,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:57:58,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:57:58,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:57:58,436 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:57:58,436 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:57:58,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:57:59,613 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:57:59,898 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:57:59,899 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:57:59,919 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ff602b2/d6b1a6475e804dd080b8d88034398d86/FLAGfdafb73f6 [2024-06-21 17:57:59,930 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ff602b2/d6b1a6475e804dd080b8d88034398d86 [2024-06-21 17:57:59,932 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:57:59,933 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:57:59,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 17:58:00,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:58:00,131 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:58:00,133 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:58:00,133 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:58:00,138 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:58:00,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:57:59" (1/2) ... [2024-06-21 17:58:00,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520f9f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:58:00, skipping insertion in model container [2024-06-21 17:58:00,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:57:59" (1/2) ... [2024-06-21 17:58:00,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c883fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:58:00, skipping insertion in model container [2024-06-21 17:58:00,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:00" (2/2) ... [2024-06-21 17:58:00,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520f9f54 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00, skipping insertion in model container [2024-06-21 17:58:00,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:00" (2/2) ... [2024-06-21 17:58:00,144 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:58:00,232 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:58:00,234 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 17:58:00,234 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 17:58:00,234 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 17:58:00,234 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:58:00,235 INFO L106 edCorrectnessWitness]: ghost_update [L830-L830] multithreaded = 1; [2024-06-21 17:58:00,284 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:58:00,638 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:58:00,646 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:58:00,769 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:58:00,817 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:58:00,818 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00 WrapperNode [2024-06-21 17:58:00,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:58:00,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:58:00,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:58:00,819 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:58:00,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,855 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,895 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-21 17:58:00,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:58:00,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:58:00,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:58:00,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:58:00,909 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,926 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,945 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]. [2024-06-21 17:58:00,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,962 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:58:00,978 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:58:00,978 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:58:00,978 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:58:00,979 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (1/1) ... [2024-06-21 17:58:00,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:58:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:58:01,009 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) [2024-06-21 17:58:01,032 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 [2024-06-21 17:58:01,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:58:01,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:58:01,053 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:58:01,054 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:58:01,054 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:58:01,054 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:58:01,054 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:58:01,055 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:58:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:58:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:58:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:58:01,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:58:01,057 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:58:01,217 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:58:01,219 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:58:01,568 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:58:01,568 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:58:01,742 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:58:01,743 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:58:01,743 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:58:01 BoogieIcfgContainer [2024-06-21 17:58:01,744 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:58:01,746 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:58:01,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:58:01,750 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:58:01,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:57:59" (1/4) ... [2024-06-21 17:58:01,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b97f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:58:01, skipping insertion in model container [2024-06-21 17:58:01,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:00" (2/4) ... [2024-06-21 17:58:01,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b97f24 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:58:01, skipping insertion in model container [2024-06-21 17:58:01,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:00" (3/4) ... [2024-06-21 17:58:01,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b97f24 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:58:01, skipping insertion in model container [2024-06-21 17:58:01,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:58:01" (4/4) ... [2024-06-21 17:58:01,754 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:58:01,770 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:58:01,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:58:01,771 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:58:01,837 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:58:01,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:58:01,907 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 17:58:01,907 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:58:01,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:58:01,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:58:01,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 17:58:01,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:58:01,934 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;@5e2ed43e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:58:01,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:58:01,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:58:01,941 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:58:01,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:58:01,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:01,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:58:01,942 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)] === [2024-06-21 17:58:01,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 362273232, now seen corresponding path program 1 times [2024-06-21 17:58:01,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:01,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736825990] [2024-06-21 17:58:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:01,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:02,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:02,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736825990] [2024-06-21 17:58:02,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736825990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:02,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:02,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:58:02,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919195609] [2024-06-21 17:58:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:02,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:58:02,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:58:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:58:02,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 17:58:02,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:02,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:02,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 17:58:02,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:03,423 INFO L124 PetriNetUnfolderBase]: 1359/2057 cut-off events. [2024-06-21 17:58:03,423 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 17:58:03,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4171 conditions, 2057 events. 1359/2057 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9805 event pairs, 941 based on Foata normal form. 1/2021 useless extension candidates. Maximal degree in co-relation 4159. Up to 2029 conditions per place. [2024-06-21 17:58:03,444 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 17:58:03,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-21 17:58:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:58:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:58:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-21 17:58:03,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 17:58:03,460 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 75 transitions. [2024-06-21 17:58:03,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-21 17:58:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:03,467 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 17:58:03,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 17:58:03,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 17:58:03,472 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 17:58:03,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:03,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:03,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:03,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:58:03,473 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)] === [2024-06-21 17:58:03,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:03,474 INFO L85 PathProgramCache]: Analyzing trace with hash 252269935, now seen corresponding path program 1 times [2024-06-21 17:58:03,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:03,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902316660] [2024-06-21 17:58:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:03,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:03,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:03,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902316660] [2024-06-21 17:58:03,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902316660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:03,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:03,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:58:03,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246349677] [2024-06-21 17:58:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:03,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:58:03,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:03,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:58:03,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:58:04,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 17:58:04,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:04,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:04,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 17:58:04,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:04,350 INFO L124 PetriNetUnfolderBase]: 1347/2039 cut-off events. [2024-06-21 17:58:04,350 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-06-21 17:58:04,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 2039 events. 1347/2039 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9652 event pairs, 715 based on Foata normal form. 6/2042 useless extension candidates. Maximal degree in co-relation 4668. Up to 1981 conditions per place. [2024-06-21 17:58:04,364 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 17:58:04,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 242 flow [2024-06-21 17:58:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:58:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:58:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-21 17:58:04,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 17:58:04,368 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 98 transitions. [2024-06-21 17:58:04,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 242 flow [2024-06-21 17:58:04,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:58:04,372 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 17:58:04,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 17:58:04,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 17:58:04,373 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 17:58:04,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:04,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:04,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:04,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:58:04,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:04,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:04,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1773666863, now seen corresponding path program 1 times [2024-06-21 17:58:04,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:04,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099916538] [2024-06-21 17:58:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:04,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:05,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:05,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099916538] [2024-06-21 17:58:05,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099916538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:05,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:05,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:58:05,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360721807] [2024-06-21 17:58:05,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:05,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:58:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:05,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:58:05,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:58:05,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:05,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-21 17:58:05,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:05,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:05,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:05,506 INFO L124 PetriNetUnfolderBase]: 1342/2032 cut-off events. [2024-06-21 17:58:05,506 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-21 17:58:05,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5206 conditions, 2032 events. 1342/2032 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9646 event pairs, 822 based on Foata normal form. 2/2031 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-21 17:58:05,518 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-21 17:58:05,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 270 flow [2024-06-21 17:58:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:58:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:58:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 17:58:05,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-21 17:58:05,521 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 96 transitions. [2024-06-21 17:58:05,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 270 flow [2024-06-21 17:58:05,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:05,524 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 164 flow [2024-06-21 17:58:05,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 17:58:05,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-21 17:58:05,525 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 164 flow [2024-06-21 17:58:05,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-21 17:58:05,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:05,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:05,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:58:05,526 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)] === [2024-06-21 17:58:05,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:05,526 INFO L85 PathProgramCache]: Analyzing trace with hash 421798061, now seen corresponding path program 1 times [2024-06-21 17:58:05,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:05,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829816598] [2024-06-21 17:58:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:05,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:06,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829816598] [2024-06-21 17:58:06,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829816598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:06,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:06,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:58:06,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688740686] [2024-06-21 17:58:06,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:06,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:58:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:58:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:58:06,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 17:58:06,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-21 17:58:06,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:06,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 17:58:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:07,158 INFO L124 PetriNetUnfolderBase]: 1333/2017 cut-off events. [2024-06-21 17:58:07,158 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2024-06-21 17:58:07,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 2017 events. 1333/2017 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9587 event pairs, 467 based on Foata normal form. 6/2020 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-21 17:58:07,170 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 17:58:07,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 378 flow [2024-06-21 17:58:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 17:58:07,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-21 17:58:07,175 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 164 flow. Second operand 6 states and 137 transitions. [2024-06-21 17:58:07,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 378 flow [2024-06-21 17:58:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 360 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:07,180 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 205 flow [2024-06-21 17:58:07,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-21 17:58:07,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 17:58:07,182 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 205 flow [2024-06-21 17:58:07,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-21 17:58:07,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:07,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:07,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:58:07,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:07,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash 859840688, now seen corresponding path program 1 times [2024-06-21 17:58:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:07,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462236152] [2024-06-21 17:58:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:07,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:07,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:07,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462236152] [2024-06-21 17:58:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462236152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:07,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:07,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:07,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470929757] [2024-06-21 17:58:07,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:07,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:07,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:07,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:07,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:07,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:07,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:07,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:08,279 INFO L124 PetriNetUnfolderBase]: 1335/2020 cut-off events. [2024-06-21 17:58:08,280 INFO L125 PetriNetUnfolderBase]: For 3078/3078 co-relation queries the response was YES. [2024-06-21 17:58:08,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 2020 events. 1335/2020 cut-off events. For 3078/3078 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9533 event pairs, 569 based on Foata normal form. 3/2020 useless extension candidates. Maximal degree in co-relation 6151. Up to 1955 conditions per place. [2024-06-21 17:58:08,294 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 51 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-21 17:58:08,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 449 flow [2024-06-21 17:58:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 17:58:08,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-21 17:58:08,296 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 205 flow. Second operand 6 states and 118 transitions. [2024-06-21 17:58:08,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 449 flow [2024-06-21 17:58:08,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 420 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:08,306 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 297 flow [2024-06-21 17:58:08,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-21 17:58:08,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 17:58:08,308 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 297 flow [2024-06-21 17:58:08,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:08,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:08,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:08,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:58:08,310 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)] === [2024-06-21 17:58:08,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash 601527408, now seen corresponding path program 1 times [2024-06-21 17:58:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:08,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911736854] [2024-06-21 17:58:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:08,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911736854] [2024-06-21 17:58:08,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911736854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:08,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:08,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312699339] [2024-06-21 17:58:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:08,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:08,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:08,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:08,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:08,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:08,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:09,438 INFO L124 PetriNetUnfolderBase]: 1357/2062 cut-off events. [2024-06-21 17:58:09,438 INFO L125 PetriNetUnfolderBase]: For 5026/5026 co-relation queries the response was YES. [2024-06-21 17:58:09,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7088 conditions, 2062 events. 1357/2062 cut-off events. For 5026/5026 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9771 event pairs, 556 based on Foata normal form. 4/2063 useless extension candidates. Maximal degree in co-relation 7066. Up to 1991 conditions per place. [2024-06-21 17:58:09,451 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-21 17:58:09,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 515 flow [2024-06-21 17:58:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 17:58:09,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 17:58:09,453 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 297 flow. Second operand 6 states and 116 transitions. [2024-06-21 17:58:09,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 515 flow [2024-06-21 17:58:09,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 501 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 17:58:09,459 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 341 flow [2024-06-21 17:58:09,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-21 17:58:09,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 17:58:09,462 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 341 flow [2024-06-21 17:58:09,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:09,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:09,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:09,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:58:09,463 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)] === [2024-06-21 17:58:09,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash 608193648, now seen corresponding path program 2 times [2024-06-21 17:58:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:09,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753873334] [2024-06-21 17:58:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:09,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:10,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753873334] [2024-06-21 17:58:10,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753873334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:10,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:10,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:10,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570295863] [2024-06-21 17:58:10,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:10,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:10,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:10,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:10,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:10,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:10,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:10,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:10,559 INFO L124 PetriNetUnfolderBase]: 1363/2071 cut-off events. [2024-06-21 17:58:10,559 INFO L125 PetriNetUnfolderBase]: For 6845/6845 co-relation queries the response was YES. [2024-06-21 17:58:10,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7656 conditions, 2071 events. 1363/2071 cut-off events. For 6845/6845 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9823 event pairs, 563 based on Foata normal form. 4/2069 useless extension candidates. Maximal degree in co-relation 7631. Up to 1973 conditions per place. [2024-06-21 17:58:10,584 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-21 17:58:10,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 563 flow [2024-06-21 17:58:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 17:58:10,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 17:58:10,586 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 341 flow. Second operand 6 states and 116 transitions. [2024-06-21 17:58:10,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 563 flow [2024-06-21 17:58:10,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 529 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:10,595 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 381 flow [2024-06-21 17:58:10,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 17:58:10,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-21 17:58:10,596 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 381 flow [2024-06-21 17:58:10,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:10,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:10,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:10,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:58:10,597 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)] === [2024-06-21 17:58:10,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash 608202576, now seen corresponding path program 1 times [2024-06-21 17:58:10,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:10,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012304049] [2024-06-21 17:58:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:10,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012304049] [2024-06-21 17:58:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012304049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:11,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:11,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390547254] [2024-06-21 17:58:11,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:11,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:11,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:11,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:11,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:11,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:11,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:11,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:11,959 INFO L124 PetriNetUnfolderBase]: 1365/2079 cut-off events. [2024-06-21 17:58:11,959 INFO L125 PetriNetUnfolderBase]: For 8603/8603 co-relation queries the response was YES. [2024-06-21 17:58:11,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8133 conditions, 2079 events. 1365/2079 cut-off events. For 8603/8603 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9942 event pairs, 533 based on Foata normal form. 3/2079 useless extension candidates. Maximal degree in co-relation 8107. Up to 1986 conditions per place. [2024-06-21 17:58:11,974 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 61 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-21 17:58:11,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 655 flow [2024-06-21 17:58:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 17:58:11,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 17:58:11,976 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 381 flow. Second operand 7 states and 136 transitions. [2024-06-21 17:58:11,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 655 flow [2024-06-21 17:58:11,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 605 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:11,983 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 420 flow [2024-06-21 17:58:11,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-21 17:58:11,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-21 17:58:11,985 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 420 flow [2024-06-21 17:58:11,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:11,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:11,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:58:11,986 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)] === [2024-06-21 17:58:11,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1467481757, now seen corresponding path program 1 times [2024-06-21 17:58:11,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:11,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101573005] [2024-06-21 17:58:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:12,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101573005] [2024-06-21 17:58:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101573005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:12,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797176185] [2024-06-21 17:58:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:12,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:12,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:12,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:12,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:12,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:12,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:12,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:12,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:13,205 INFO L124 PetriNetUnfolderBase]: 1501/2281 cut-off events. [2024-06-21 17:58:13,205 INFO L125 PetriNetUnfolderBase]: For 10888/10888 co-relation queries the response was YES. [2024-06-21 17:58:13,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9412 conditions, 2281 events. 1501/2281 cut-off events. For 10888/10888 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11088 event pairs, 524 based on Foata normal form. 10/2288 useless extension candidates. Maximal degree in co-relation 9385. Up to 2058 conditions per place. [2024-06-21 17:58:13,220 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 80 selfloop transitions, 28 changer transitions 0/113 dead transitions. [2024-06-21 17:58:13,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 874 flow [2024-06-21 17:58:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 17:58:13,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-21 17:58:13,222 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 420 flow. Second operand 7 states and 149 transitions. [2024-06-21 17:58:13,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 874 flow [2024-06-21 17:58:13,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 113 transitions, 815 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:13,231 INFO L231 Difference]: Finished difference. Result has 71 places, 84 transitions, 597 flow [2024-06-21 17:58:13,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=597, PETRI_PLACES=71, PETRI_TRANSITIONS=84} [2024-06-21 17:58:13,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-21 17:58:13,232 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 84 transitions, 597 flow [2024-06-21 17:58:13,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:13,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:13,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:13,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:58:13,233 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)] === [2024-06-21 17:58:13,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1674402107, now seen corresponding path program 2 times [2024-06-21 17:58:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:13,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68237775] [2024-06-21 17:58:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:13,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:13,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:13,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68237775] [2024-06-21 17:58:13,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68237775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:13,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:13,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903705329] [2024-06-21 17:58:13,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:13,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:13,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:13,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 84 transitions, 597 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:13,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:13,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:13,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:14,502 INFO L124 PetriNetUnfolderBase]: 1725/2614 cut-off events. [2024-06-21 17:58:14,503 INFO L125 PetriNetUnfolderBase]: For 17217/17217 co-relation queries the response was YES. [2024-06-21 17:58:14,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12660 conditions, 2614 events. 1725/2614 cut-off events. For 17217/17217 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13059 event pairs, 550 based on Foata normal form. 10/2618 useless extension candidates. Maximal degree in co-relation 12629. Up to 2028 conditions per place. [2024-06-21 17:58:14,522 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 81 selfloop transitions, 44 changer transitions 0/130 dead transitions. [2024-06-21 17:58:14,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 1177 flow [2024-06-21 17:58:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-21 17:58:14,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-21 17:58:14,525 INFO L175 Difference]: Start difference. First operand has 71 places, 84 transitions, 597 flow. Second operand 7 states and 151 transitions. [2024-06-21 17:58:14,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 1177 flow [2024-06-21 17:58:14,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 130 transitions, 1133 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 17:58:14,541 INFO L231 Difference]: Finished difference. Result has 79 places, 98 transitions, 841 flow [2024-06-21 17:58:14,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=841, PETRI_PLACES=79, PETRI_TRANSITIONS=98} [2024-06-21 17:58:14,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-21 17:58:14,545 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 98 transitions, 841 flow [2024-06-21 17:58:14,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:14,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:14,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:14,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:58:14,546 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)] === [2024-06-21 17:58:14,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1674135197, now seen corresponding path program 3 times [2024-06-21 17:58:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:14,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309379547] [2024-06-21 17:58:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:15,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309379547] [2024-06-21 17:58:15,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309379547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:15,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:15,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:15,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173054278] [2024-06-21 17:58:15,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:15,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:15,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:15,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:15,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 98 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:15,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:15,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:15,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:15,799 INFO L124 PetriNetUnfolderBase]: 1805/2753 cut-off events. [2024-06-21 17:58:15,799 INFO L125 PetriNetUnfolderBase]: For 22598/22598 co-relation queries the response was YES. [2024-06-21 17:58:15,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14730 conditions, 2753 events. 1805/2753 cut-off events. For 22598/22598 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13945 event pairs, 591 based on Foata normal form. 10/2757 useless extension candidates. Maximal degree in co-relation 14694. Up to 2082 conditions per place. [2024-06-21 17:58:15,823 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 83 selfloop transitions, 48 changer transitions 0/136 dead transitions. [2024-06-21 17:58:15,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 1367 flow [2024-06-21 17:58:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 17:58:15,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-21 17:58:15,825 INFO L175 Difference]: Start difference. First operand has 79 places, 98 transitions, 841 flow. Second operand 7 states and 150 transitions. [2024-06-21 17:58:15,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 1367 flow [2024-06-21 17:58:15,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 1304 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:15,851 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 1050 flow [2024-06-21 17:58:15,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1050, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2024-06-21 17:58:15,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 17:58:15,852 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 1050 flow [2024-06-21 17:58:15,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:15,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:15,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:15,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:58:15,853 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)] === [2024-06-21 17:58:15,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1674412027, now seen corresponding path program 1 times [2024-06-21 17:58:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788913049] [2024-06-21 17:58:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:15,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:16,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:16,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788913049] [2024-06-21 17:58:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788913049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:16,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210762577] [2024-06-21 17:58:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:16,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:16,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:16,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 1050 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:16,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:16,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:16,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:17,370 INFO L124 PetriNetUnfolderBase]: 1808/2751 cut-off events. [2024-06-21 17:58:17,370 INFO L125 PetriNetUnfolderBase]: For 25358/25358 co-relation queries the response was YES. [2024-06-21 17:58:17,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15456 conditions, 2751 events. 1808/2751 cut-off events. For 25358/25358 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13755 event pairs, 616 based on Foata normal form. 6/2754 useless extension candidates. Maximal degree in co-relation 15416. Up to 2581 conditions per place. [2024-06-21 17:58:17,390 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 108 selfloop transitions, 24 changer transitions 0/137 dead transitions. [2024-06-21 17:58:17,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 137 transitions, 1472 flow [2024-06-21 17:58:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:58:17,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 17:58:17,392 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 1050 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:58:17,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 137 transitions, 1472 flow [2024-06-21 17:58:17,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 1403 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:17,419 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1093 flow [2024-06-21 17:58:17,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1093, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-21 17:58:17,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 17:58:17,421 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1093 flow [2024-06-21 17:58:17,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:17,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:17,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:17,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:58:17,422 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:17,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash 887693882, now seen corresponding path program 1 times [2024-06-21 17:58:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:17,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268035565] [2024-06-21 17:58:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:17,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:17,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:17,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268035565] [2024-06-21 17:58:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268035565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:17,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:17,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:58:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553782948] [2024-06-21 17:58:17,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:17,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:58:17,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:58:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:58:17,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:17,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1093 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:17,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:17,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:17,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:18,358 INFO L124 PetriNetUnfolderBase]: 1805/2745 cut-off events. [2024-06-21 17:58:18,358 INFO L125 PetriNetUnfolderBase]: For 26861/26861 co-relation queries the response was YES. [2024-06-21 17:58:18,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15673 conditions, 2745 events. 1805/2745 cut-off events. For 26861/26861 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13722 event pairs, 642 based on Foata normal form. 1/2743 useless extension candidates. Maximal degree in co-relation 15631. Up to 2650 conditions per place. [2024-06-21 17:58:18,380 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 106 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2024-06-21 17:58:18,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 1341 flow [2024-06-21 17:58:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:58:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:58:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 17:58:18,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 17:58:18,381 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1093 flow. Second operand 5 states and 91 transitions. [2024-06-21 17:58:18,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 1341 flow [2024-06-21 17:58:18,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 1247 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:18,410 INFO L231 Difference]: Finished difference. Result has 91 places, 111 transitions, 1021 flow [2024-06-21 17:58:18,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1021, PETRI_PLACES=91, PETRI_TRANSITIONS=111} [2024-06-21 17:58:18,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-21 17:58:18,411 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 111 transitions, 1021 flow [2024-06-21 17:58:18,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:18,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:18,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:58:18,411 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:18,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1757473009, now seen corresponding path program 1 times [2024-06-21 17:58:18,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:18,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885867088] [2024-06-21 17:58:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:18,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:19,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885867088] [2024-06-21 17:58:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885867088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:19,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:19,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:19,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174594050] [2024-06-21 17:58:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:19,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:19,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:19,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:19,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 111 transitions, 1021 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:19,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:19,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:19,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:19,736 INFO L124 PetriNetUnfolderBase]: 1800/2738 cut-off events. [2024-06-21 17:58:19,737 INFO L125 PetriNetUnfolderBase]: For 28790/28790 co-relation queries the response was YES. [2024-06-21 17:58:19,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15538 conditions, 2738 events. 1800/2738 cut-off events. For 28790/28790 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13725 event pairs, 624 based on Foata normal form. 2/2737 useless extension candidates. Maximal degree in co-relation 15495. Up to 2607 conditions per place. [2024-06-21 17:58:19,756 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 120 selfloop transitions, 14 changer transitions 0/139 dead transitions. [2024-06-21 17:58:19,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 139 transitions, 1399 flow [2024-06-21 17:58:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 17:58:19,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 17:58:19,758 INFO L175 Difference]: Start difference. First operand has 91 places, 111 transitions, 1021 flow. Second operand 7 states and 135 transitions. [2024-06-21 17:58:19,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 139 transitions, 1399 flow [2024-06-21 17:58:19,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1377 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:19,791 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1087 flow [2024-06-21 17:58:19,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1087, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2024-06-21 17:58:19,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-21 17:58:19,792 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1087 flow [2024-06-21 17:58:19,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:19,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:19,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:19,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:58:19,793 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)] === [2024-06-21 17:58:19,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1752704465, now seen corresponding path program 1 times [2024-06-21 17:58:19,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:19,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099565887] [2024-06-21 17:58:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:19,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:20,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:20,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099565887] [2024-06-21 17:58:20,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099565887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:20,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:20,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:20,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162275880] [2024-06-21 17:58:20,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:20,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:20,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:20,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 1087 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:21,149 INFO L124 PetriNetUnfolderBase]: 1864/2829 cut-off events. [2024-06-21 17:58:21,149 INFO L125 PetriNetUnfolderBase]: For 33178/33178 co-relation queries the response was YES. [2024-06-21 17:58:21,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16481 conditions, 2829 events. 1864/2829 cut-off events. For 33178/33178 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14207 event pairs, 551 based on Foata normal form. 10/2836 useless extension candidates. Maximal degree in co-relation 16438. Up to 2524 conditions per place. [2024-06-21 17:58:21,171 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 115 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-21 17:58:21,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 154 transitions, 1641 flow [2024-06-21 17:58:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 17:58:21,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-21 17:58:21,173 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1087 flow. Second operand 8 states and 170 transitions. [2024-06-21 17:58:21,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 154 transitions, 1641 flow [2024-06-21 17:58:21,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 1577 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:21,204 INFO L231 Difference]: Finished difference. Result has 97 places, 120 transitions, 1184 flow [2024-06-21 17:58:21,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1184, PETRI_PLACES=97, PETRI_TRANSITIONS=120} [2024-06-21 17:58:21,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-21 17:58:21,205 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 120 transitions, 1184 flow [2024-06-21 17:58:21,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:21,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:21,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:21,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:58:21,206 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)] === [2024-06-21 17:58:21,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:21,206 INFO L85 PathProgramCache]: Analyzing trace with hash 329991037, now seen corresponding path program 2 times [2024-06-21 17:58:21,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:21,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751450662] [2024-06-21 17:58:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:21,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:22,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:22,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751450662] [2024-06-21 17:58:22,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751450662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:22,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:22,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:22,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958499646] [2024-06-21 17:58:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:22,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:22,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 120 transitions, 1184 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:22,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:22,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:22,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:22,866 INFO L124 PetriNetUnfolderBase]: 1928/2922 cut-off events. [2024-06-21 17:58:22,867 INFO L125 PetriNetUnfolderBase]: For 37938/37938 co-relation queries the response was YES. [2024-06-21 17:58:22,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18052 conditions, 2922 events. 1928/2922 cut-off events. For 37938/37938 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14772 event pairs, 527 based on Foata normal form. 10/2926 useless extension candidates. Maximal degree in co-relation 18008. Up to 2216 conditions per place. [2024-06-21 17:58:22,892 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 97 selfloop transitions, 57 changer transitions 0/159 dead transitions. [2024-06-21 17:58:22,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 159 transitions, 1776 flow [2024-06-21 17:58:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 17:58:22,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-21 17:58:22,895 INFO L175 Difference]: Start difference. First operand has 97 places, 120 transitions, 1184 flow. Second operand 8 states and 171 transitions. [2024-06-21 17:58:22,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 159 transitions, 1776 flow [2024-06-21 17:58:22,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 159 transitions, 1661 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:22,931 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 1288 flow [2024-06-21 17:58:22,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1288, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2024-06-21 17:58:22,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-21 17:58:22,933 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 1288 flow [2024-06-21 17:58:22,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:22,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:22,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:22,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:58:22,934 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)] === [2024-06-21 17:58:22,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash 330287707, now seen corresponding path program 3 times [2024-06-21 17:58:22,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:22,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241602149] [2024-06-21 17:58:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:22,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:23,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241602149] [2024-06-21 17:58:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241602149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157326575] [2024-06-21 17:58:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:23,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:23,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:23,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 1288 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:23,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:23,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:23,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:24,394 INFO L124 PetriNetUnfolderBase]: 2040/3088 cut-off events. [2024-06-21 17:58:24,394 INFO L125 PetriNetUnfolderBase]: For 44869/44869 co-relation queries the response was YES. [2024-06-21 17:58:24,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20182 conditions, 3088 events. 2040/3088 cut-off events. For 44869/44869 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15704 event pairs, 527 based on Foata normal form. 5/3087 useless extension candidates. Maximal degree in co-relation 20137. Up to 2181 conditions per place. [2024-06-21 17:58:24,412 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 97 selfloop transitions, 76 changer transitions 0/178 dead transitions. [2024-06-21 17:58:24,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 178 transitions, 2118 flow [2024-06-21 17:58:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 17:58:24,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-21 17:58:24,415 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 1288 flow. Second operand 9 states and 195 transitions. [2024-06-21 17:58:24,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 178 transitions, 2118 flow [2024-06-21 17:58:24,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 178 transitions, 1945 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:24,450 INFO L231 Difference]: Finished difference. Result has 103 places, 137 transitions, 1491 flow [2024-06-21 17:58:24,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1491, PETRI_PLACES=103, PETRI_TRANSITIONS=137} [2024-06-21 17:58:24,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-21 17:58:24,451 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 137 transitions, 1491 flow [2024-06-21 17:58:24,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:24,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:24,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:24,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:58:24,452 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)] === [2024-06-21 17:58:24,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash 358584879, now seen corresponding path program 4 times [2024-06-21 17:58:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678121777] [2024-06-21 17:58:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:25,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:25,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678121777] [2024-06-21 17:58:25,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678121777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:25,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:25,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:25,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359523589] [2024-06-21 17:58:25,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:25,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:25,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:25,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:25,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:25,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:25,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 1491 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:25,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:25,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:25,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:26,096 INFO L124 PetriNetUnfolderBase]: 2056/3125 cut-off events. [2024-06-21 17:58:26,097 INFO L125 PetriNetUnfolderBase]: For 52039/52039 co-relation queries the response was YES. [2024-06-21 17:58:26,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21607 conditions, 3125 events. 2056/3125 cut-off events. For 52039/52039 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15982 event pairs, 553 based on Foata normal form. 10/3129 useless extension candidates. Maximal degree in co-relation 21560. Up to 2397 conditions per place. [2024-06-21 17:58:26,115 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 116 selfloop transitions, 54 changer transitions 0/175 dead transitions. [2024-06-21 17:58:26,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 175 transitions, 2141 flow [2024-06-21 17:58:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 17:58:26,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-21 17:58:26,116 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 1491 flow. Second operand 8 states and 171 transitions. [2024-06-21 17:58:26,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 175 transitions, 2141 flow [2024-06-21 17:58:26,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 175 transitions, 2004 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:26,155 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1561 flow [2024-06-21 17:58:26,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1561, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-21 17:58:26,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-21 17:58:26,156 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1561 flow [2024-06-21 17:58:26,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:26,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:26,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:26,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:58:26,157 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:26,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:26,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1748707745, now seen corresponding path program 1 times [2024-06-21 17:58:26,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:26,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085882634] [2024-06-21 17:58:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:26,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:26,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085882634] [2024-06-21 17:58:26,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085882634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:26,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:26,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802170114] [2024-06-21 17:58:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:26,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:26,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:26,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:26,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:26,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1561 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:26,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:26,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:27,294 INFO L124 PetriNetUnfolderBase]: 2070/3135 cut-off events. [2024-06-21 17:58:27,294 INFO L125 PetriNetUnfolderBase]: For 55032/55032 co-relation queries the response was YES. [2024-06-21 17:58:27,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22338 conditions, 3135 events. 2070/3135 cut-off events. For 55032/55032 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15925 event pairs, 631 based on Foata normal form. 6/3132 useless extension candidates. Maximal degree in co-relation 22289. Up to 2934 conditions per place. [2024-06-21 17:58:27,314 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 136 selfloop transitions, 23 changer transitions 0/164 dead transitions. [2024-06-21 17:58:27,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 164 transitions, 2105 flow [2024-06-21 17:58:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 17:58:27,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-06-21 17:58:27,316 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1561 flow. Second operand 6 states and 115 transitions. [2024-06-21 17:58:27,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 164 transitions, 2105 flow [2024-06-21 17:58:27,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 164 transitions, 1922 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:27,357 INFO L231 Difference]: Finished difference. Result has 107 places, 150 transitions, 1584 flow [2024-06-21 17:58:27,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1584, PETRI_PLACES=107, PETRI_TRANSITIONS=150} [2024-06-21 17:58:27,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 17:58:27,357 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 150 transitions, 1584 flow [2024-06-21 17:58:27,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:27,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:27,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:27,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:58:27,358 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)] === [2024-06-21 17:58:27,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash 947423710, now seen corresponding path program 1 times [2024-06-21 17:58:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327684507] [2024-06-21 17:58:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:28,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:28,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327684507] [2024-06-21 17:58:28,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327684507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:28,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:28,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:28,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137135629] [2024-06-21 17:58:28,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:28,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:28,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:28,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:28,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:28,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:28,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 150 transitions, 1584 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:28,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:28,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:28,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:28,847 INFO L124 PetriNetUnfolderBase]: 2169/3288 cut-off events. [2024-06-21 17:58:28,847 INFO L125 PetriNetUnfolderBase]: For 61358/61358 co-relation queries the response was YES. [2024-06-21 17:58:28,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23423 conditions, 3288 events. 2169/3288 cut-off events. For 61358/61358 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16780 event pairs, 621 based on Foata normal form. 6/3291 useless extension candidates. Maximal degree in co-relation 23372. Up to 3034 conditions per place. [2024-06-21 17:58:28,872 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 169 selfloop transitions, 44 changer transitions 0/218 dead transitions. [2024-06-21 17:58:28,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 218 transitions, 2704 flow [2024-06-21 17:58:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:58:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:58:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 17:58:28,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-21 17:58:28,875 INFO L175 Difference]: Start difference. First operand has 107 places, 150 transitions, 1584 flow. Second operand 10 states and 203 transitions. [2024-06-21 17:58:28,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 218 transitions, 2704 flow [2024-06-21 17:58:28,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 218 transitions, 2629 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:28,921 INFO L231 Difference]: Finished difference. Result has 118 places, 176 transitions, 2056 flow [2024-06-21 17:58:28,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2056, PETRI_PLACES=118, PETRI_TRANSITIONS=176} [2024-06-21 17:58:28,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 17:58:28,921 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 176 transitions, 2056 flow [2024-06-21 17:58:28,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:28,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:28,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:28,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:58:28,922 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:28,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:28,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1678400178, now seen corresponding path program 2 times [2024-06-21 17:58:28,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:28,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936921359] [2024-06-21 17:58:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:28,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:29,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936921359] [2024-06-21 17:58:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936921359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:29,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:29,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:29,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787831013] [2024-06-21 17:58:29,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:29,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:29,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:29,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:29,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:29,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:29,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 176 transitions, 2056 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:29,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:29,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:29,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:30,602 INFO L124 PetriNetUnfolderBase]: 2201/3346 cut-off events. [2024-06-21 17:58:30,602 INFO L125 PetriNetUnfolderBase]: For 69257/69257 co-relation queries the response was YES. [2024-06-21 17:58:30,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24899 conditions, 3346 events. 2201/3346 cut-off events. For 69257/69257 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17214 event pairs, 602 based on Foata normal form. 5/3348 useless extension candidates. Maximal degree in co-relation 24843. Up to 3050 conditions per place. [2024-06-21 17:58:30,627 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 170 selfloop transitions, 49 changer transitions 0/224 dead transitions. [2024-06-21 17:58:30,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 224 transitions, 3054 flow [2024-06-21 17:58:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 17:58:30,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-21 17:58:30,628 INFO L175 Difference]: Start difference. First operand has 118 places, 176 transitions, 2056 flow. Second operand 8 states and 170 transitions. [2024-06-21 17:58:30,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 224 transitions, 3054 flow [2024-06-21 17:58:30,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 224 transitions, 2837 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:30,686 INFO L231 Difference]: Finished difference. Result has 125 places, 191 transitions, 2325 flow [2024-06-21 17:58:30,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2325, PETRI_PLACES=125, PETRI_TRANSITIONS=191} [2024-06-21 17:58:30,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 17:58:30,687 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 191 transitions, 2325 flow [2024-06-21 17:58:30,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:30,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:30,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:30,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:58:30,688 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)] === [2024-06-21 17:58:30,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1500737788, now seen corresponding path program 1 times [2024-06-21 17:58:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:30,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655090315] [2024-06-21 17:58:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:30,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:31,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655090315] [2024-06-21 17:58:31,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655090315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:31,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:31,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313480464] [2024-06-21 17:58:31,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:31,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:31,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:31,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:31,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 191 transitions, 2325 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:31,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:31,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:31,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:32,478 INFO L124 PetriNetUnfolderBase]: 2301/3509 cut-off events. [2024-06-21 17:58:32,478 INFO L125 PetriNetUnfolderBase]: For 80537/80537 co-relation queries the response was YES. [2024-06-21 17:58:32,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26579 conditions, 3509 events. 2301/3509 cut-off events. For 80537/80537 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18289 event pairs, 580 based on Foata normal form. 17/3523 useless extension candidates. Maximal degree in co-relation 26519. Up to 3142 conditions per place. [2024-06-21 17:58:32,504 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 212 selfloop transitions, 47 changer transitions 0/264 dead transitions. [2024-06-21 17:58:32,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 264 transitions, 3551 flow [2024-06-21 17:58:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 17:58:32,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-21 17:58:32,506 INFO L175 Difference]: Start difference. First operand has 125 places, 191 transitions, 2325 flow. Second operand 9 states and 192 transitions. [2024-06-21 17:58:32,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 264 transitions, 3551 flow [2024-06-21 17:58:32,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 264 transitions, 3373 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:32,574 INFO L231 Difference]: Finished difference. Result has 135 places, 223 transitions, 2793 flow [2024-06-21 17:58:32,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2793, PETRI_PLACES=135, PETRI_TRANSITIONS=223} [2024-06-21 17:58:32,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 17:58:32,575 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 223 transitions, 2793 flow [2024-06-21 17:58:32,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:32,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:32,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:32,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:58:32,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:32,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1427272503, now seen corresponding path program 1 times [2024-06-21 17:58:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:32,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659846919] [2024-06-21 17:58:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:32,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:33,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:33,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659846919] [2024-06-21 17:58:33,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659846919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:33,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:33,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962970080] [2024-06-21 17:58:33,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:33,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:33,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 223 transitions, 2793 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:33,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:33,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:33,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:33,827 INFO L124 PetriNetUnfolderBase]: 2308/3522 cut-off events. [2024-06-21 17:58:33,827 INFO L125 PetriNetUnfolderBase]: For 87776/87776 co-relation queries the response was YES. [2024-06-21 17:58:33,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27864 conditions, 3522 events. 2308/3522 cut-off events. For 87776/87776 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18351 event pairs, 596 based on Foata normal form. 3/3522 useless extension candidates. Maximal degree in co-relation 27797. Up to 3265 conditions per place. [2024-06-21 17:58:33,856 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 44 changer transitions 0/245 dead transitions. [2024-06-21 17:58:33,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 245 transitions, 3486 flow [2024-06-21 17:58:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 17:58:33,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-21 17:58:33,857 INFO L175 Difference]: Start difference. First operand has 135 places, 223 transitions, 2793 flow. Second operand 6 states and 122 transitions. [2024-06-21 17:58:33,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 245 transitions, 3486 flow [2024-06-21 17:58:33,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 245 transitions, 3322 flow, removed 81 selfloop flow, removed 1 redundant places. [2024-06-21 17:58:33,953 INFO L231 Difference]: Finished difference. Result has 140 places, 228 transitions, 2833 flow [2024-06-21 17:58:33,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2833, PETRI_PLACES=140, PETRI_TRANSITIONS=228} [2024-06-21 17:58:33,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 17:58:33,954 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 228 transitions, 2833 flow [2024-06-21 17:58:33,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:33,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:33,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:33,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:58:33,954 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)] === [2024-06-21 17:58:33,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1502745574, now seen corresponding path program 2 times [2024-06-21 17:58:33,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:33,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857677631] [2024-06-21 17:58:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:34,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:34,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857677631] [2024-06-21 17:58:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857677631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:34,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254539054] [2024-06-21 17:58:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:34,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:34,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:34,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:34,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 228 transitions, 2833 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:34,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:34,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:35,803 INFO L124 PetriNetUnfolderBase]: 2993/4634 cut-off events. [2024-06-21 17:58:35,803 INFO L125 PetriNetUnfolderBase]: For 136681/136681 co-relation queries the response was YES. [2024-06-21 17:58:35,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36780 conditions, 4634 events. 2993/4634 cut-off events. For 136681/136681 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25910 event pairs, 698 based on Foata normal form. 18/4646 useless extension candidates. Maximal degree in co-relation 36710. Up to 2353 conditions per place. [2024-06-21 17:58:35,929 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 192 selfloop transitions, 94 changer transitions 0/291 dead transitions. [2024-06-21 17:58:35,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 291 transitions, 4218 flow [2024-06-21 17:58:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 17:58:35,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-21 17:58:35,931 INFO L175 Difference]: Start difference. First operand has 140 places, 228 transitions, 2833 flow. Second operand 9 states and 203 transitions. [2024-06-21 17:58:35,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 291 transitions, 4218 flow [2024-06-21 17:58:36,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 291 transitions, 4108 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:36,030 INFO L231 Difference]: Finished difference. Result has 147 places, 235 transitions, 3139 flow [2024-06-21 17:58:36,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3139, PETRI_PLACES=147, PETRI_TRANSITIONS=235} [2024-06-21 17:58:36,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 17:58:36,031 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 235 transitions, 3139 flow [2024-06-21 17:58:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:36,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:36,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:36,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:58:36,031 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)] === [2024-06-21 17:58:36,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1503072004, now seen corresponding path program 3 times [2024-06-21 17:58:36,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:36,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947426772] [2024-06-21 17:58:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:36,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:36,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:36,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947426772] [2024-06-21 17:58:36,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947426772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:36,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:36,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228462885] [2024-06-21 17:58:36,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:36,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:36,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:36,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:36,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:36,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 235 transitions, 3139 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:36,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:36,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:36,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:38,039 INFO L124 PetriNetUnfolderBase]: 3393/5290 cut-off events. [2024-06-21 17:58:38,040 INFO L125 PetriNetUnfolderBase]: For 188454/188454 co-relation queries the response was YES. [2024-06-21 17:58:38,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43122 conditions, 5290 events. 3393/5290 cut-off events. For 188454/188454 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 30466 event pairs, 821 based on Foata normal form. 92/5376 useless extension candidates. Maximal degree in co-relation 43050. Up to 3670 conditions per place. [2024-06-21 17:58:38,090 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 192 selfloop transitions, 94 changer transitions 0/291 dead transitions. [2024-06-21 17:58:38,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 291 transitions, 4319 flow [2024-06-21 17:58:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:58:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:58:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-21 17:58:38,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-21 17:58:38,091 INFO L175 Difference]: Start difference. First operand has 147 places, 235 transitions, 3139 flow. Second operand 10 states and 219 transitions. [2024-06-21 17:58:38,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 291 transitions, 4319 flow [2024-06-21 17:58:38,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 291 transitions, 4160 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:38,254 INFO L231 Difference]: Finished difference. Result has 152 places, 238 transitions, 3280 flow [2024-06-21 17:58:38,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3280, PETRI_PLACES=152, PETRI_TRANSITIONS=238} [2024-06-21 17:58:38,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 17:58:38,254 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 238 transitions, 3280 flow [2024-06-21 17:58:38,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:38,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:38,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:38,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:58:38,255 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)] === [2024-06-21 17:58:38,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1768769284, now seen corresponding path program 4 times [2024-06-21 17:58:38,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:38,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277737825] [2024-06-21 17:58:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:38,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:39,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:39,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277737825] [2024-06-21 17:58:39,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277737825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:39,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:39,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:39,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342929687] [2024-06-21 17:58:39,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:39,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:39,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:39,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:39,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:39,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:39,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 238 transitions, 3280 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:39,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:39,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:40,400 INFO L124 PetriNetUnfolderBase]: 3755/5899 cut-off events. [2024-06-21 17:58:40,400 INFO L125 PetriNetUnfolderBase]: For 211281/211281 co-relation queries the response was YES. [2024-06-21 17:58:40,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48017 conditions, 5899 events. 3755/5899 cut-off events. For 211281/211281 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 35011 event pairs, 916 based on Foata normal form. 92/5985 useless extension candidates. Maximal degree in co-relation 47943. Up to 4489 conditions per place. [2024-06-21 17:58:40,453 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 221 selfloop transitions, 62 changer transitions 0/288 dead transitions. [2024-06-21 17:58:40,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 288 transitions, 4394 flow [2024-06-21 17:58:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 17:58:40,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-21 17:58:40,455 INFO L175 Difference]: Start difference. First operand has 152 places, 238 transitions, 3280 flow. Second operand 9 states and 196 transitions. [2024-06-21 17:58:40,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 288 transitions, 4394 flow [2024-06-21 17:58:40,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 288 transitions, 4180 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:58:40,643 INFO L231 Difference]: Finished difference. Result has 153 places, 241 transitions, 3306 flow [2024-06-21 17:58:40,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3066, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3306, PETRI_PLACES=153, PETRI_TRANSITIONS=241} [2024-06-21 17:58:40,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-21 17:58:40,644 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 241 transitions, 3306 flow [2024-06-21 17:58:40,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:40,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:40,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:40,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:58:40,644 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:40,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:40,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1624648423, now seen corresponding path program 2 times [2024-06-21 17:58:40,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:40,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325954329] [2024-06-21 17:58:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:40,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:41,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325954329] [2024-06-21 17:58:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325954329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:41,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:41,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:41,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808362353] [2024-06-21 17:58:41,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:41,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:41,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:41,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 241 transitions, 3306 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:41,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:41,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:41,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:42,113 INFO L124 PetriNetUnfolderBase]: 3726/5836 cut-off events. [2024-06-21 17:58:42,113 INFO L125 PetriNetUnfolderBase]: For 186490/186490 co-relation queries the response was YES. [2024-06-21 17:58:42,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47315 conditions, 5836 events. 3726/5836 cut-off events. For 186490/186490 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 34415 event pairs, 1136 based on Foata normal form. 7/5833 useless extension candidates. Maximal degree in co-relation 47240. Up to 5584 conditions per place. [2024-06-21 17:58:42,165 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 41 changer transitions 0/251 dead transitions. [2024-06-21 17:58:42,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 251 transitions, 3842 flow [2024-06-21 17:58:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 17:58:42,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:58:42,167 INFO L175 Difference]: Start difference. First operand has 153 places, 241 transitions, 3306 flow. Second operand 6 states and 114 transitions. [2024-06-21 17:58:42,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 251 transitions, 3842 flow [2024-06-21 17:58:42,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 251 transitions, 3590 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:42,474 INFO L231 Difference]: Finished difference. Result has 152 places, 241 transitions, 3156 flow [2024-06-21 17:58:42,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3156, PETRI_PLACES=152, PETRI_TRANSITIONS=241} [2024-06-21 17:58:42,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 17:58:42,474 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 241 transitions, 3156 flow [2024-06-21 17:58:42,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:42,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:42,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:42,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:58:42,475 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:42,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1433945687, now seen corresponding path program 1 times [2024-06-21 17:58:42,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:42,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765878474] [2024-06-21 17:58:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:42,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:42,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765878474] [2024-06-21 17:58:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765878474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:42,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:42,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:42,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456740071] [2024-06-21 17:58:42,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:42,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:42,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:42,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:42,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 241 transitions, 3156 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:42,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:42,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:42,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:44,030 INFO L124 PetriNetUnfolderBase]: 3728/5848 cut-off events. [2024-06-21 17:58:44,030 INFO L125 PetriNetUnfolderBase]: For 179994/179994 co-relation queries the response was YES. [2024-06-21 17:58:44,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46391 conditions, 5848 events. 3728/5848 cut-off events. For 179994/179994 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 34722 event pairs, 1171 based on Foata normal form. 2/5847 useless extension candidates. Maximal degree in co-relation 46315. Up to 5650 conditions per place. [2024-06-21 17:58:44,088 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 19 changer transitions 0/257 dead transitions. [2024-06-21 17:58:44,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 257 transitions, 3784 flow [2024-06-21 17:58:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:58:44,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-21 17:58:44,090 INFO L175 Difference]: Start difference. First operand has 152 places, 241 transitions, 3156 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:58:44,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 257 transitions, 3784 flow [2024-06-21 17:58:44,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 257 transitions, 3658 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:44,254 INFO L231 Difference]: Finished difference. Result has 152 places, 244 transitions, 3108 flow [2024-06-21 17:58:44,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3108, PETRI_PLACES=152, PETRI_TRANSITIONS=244} [2024-06-21 17:58:44,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 17:58:44,255 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 244 transitions, 3108 flow [2024-06-21 17:58:44,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:44,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:44,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:44,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:58:44,256 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:44,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1624641479, now seen corresponding path program 2 times [2024-06-21 17:58:44,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:44,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410159484] [2024-06-21 17:58:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:44,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410159484] [2024-06-21 17:58:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410159484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:44,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:44,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986446643] [2024-06-21 17:58:44,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:44,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:44,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:44,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 244 transitions, 3108 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:44,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:44,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:44,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:45,707 INFO L124 PetriNetUnfolderBase]: 3689/5781 cut-off events. [2024-06-21 17:58:45,707 INFO L125 PetriNetUnfolderBase]: For 185480/185480 co-relation queries the response was YES. [2024-06-21 17:58:45,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46136 conditions, 5781 events. 3689/5781 cut-off events. For 185480/185480 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34190 event pairs, 1163 based on Foata normal form. 1/5779 useless extension candidates. Maximal degree in co-relation 46059. Up to 5618 conditions per place. [2024-06-21 17:58:45,759 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 237 selfloop transitions, 11 changer transitions 0/253 dead transitions. [2024-06-21 17:58:45,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 253 transitions, 3630 flow [2024-06-21 17:58:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 17:58:45,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 17:58:45,760 INFO L175 Difference]: Start difference. First operand has 152 places, 244 transitions, 3108 flow. Second operand 6 states and 105 transitions. [2024-06-21 17:58:45,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 253 transitions, 3630 flow [2024-06-21 17:58:45,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 253 transitions, 3601 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:45,928 INFO L231 Difference]: Finished difference. Result has 155 places, 244 transitions, 3107 flow [2024-06-21 17:58:45,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3079, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3107, PETRI_PLACES=155, PETRI_TRANSITIONS=244} [2024-06-21 17:58:45,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 17:58:45,929 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 244 transitions, 3107 flow [2024-06-21 17:58:45,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:45,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:45,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:45,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:58:45,930 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:45,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:45,930 INFO L85 PathProgramCache]: Analyzing trace with hash -214904896, now seen corresponding path program 1 times [2024-06-21 17:58:45,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:45,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687043743] [2024-06-21 17:58:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:45,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:46,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:46,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687043743] [2024-06-21 17:58:46,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687043743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:46,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:46,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:46,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286927059] [2024-06-21 17:58:46,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:46,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:46,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:46,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 244 transitions, 3107 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:46,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:46,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:46,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:47,749 INFO L124 PetriNetUnfolderBase]: 3706/5809 cut-off events. [2024-06-21 17:58:47,749 INFO L125 PetriNetUnfolderBase]: For 194832/194832 co-relation queries the response was YES. [2024-06-21 17:58:47,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46613 conditions, 5809 events. 3706/5809 cut-off events. For 194832/194832 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34216 event pairs, 1004 based on Foata normal form. 4/5810 useless extension candidates. Maximal degree in co-relation 46535. Up to 5557 conditions per place. [2024-06-21 17:58:47,799 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 17 changer transitions 0/276 dead transitions. [2024-06-21 17:58:47,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 276 transitions, 3797 flow [2024-06-21 17:58:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:58:47,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:58:47,801 INFO L175 Difference]: Start difference. First operand has 155 places, 244 transitions, 3107 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:58:47,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 276 transitions, 3797 flow [2024-06-21 17:58:47,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 276 transitions, 3750 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:47,978 INFO L231 Difference]: Finished difference. Result has 157 places, 246 transitions, 3163 flow [2024-06-21 17:58:47,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3163, PETRI_PLACES=157, PETRI_TRANSITIONS=246} [2024-06-21 17:58:47,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-21 17:58:47,979 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 246 transitions, 3163 flow [2024-06-21 17:58:47,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:47,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:47,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:47,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:58:47,979 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)] === [2024-06-21 17:58:47,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2019320708, now seen corresponding path program 2 times [2024-06-21 17:58:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:47,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587432932] [2024-06-21 17:58:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:48,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587432932] [2024-06-21 17:58:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587432932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:48,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:48,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186020914] [2024-06-21 17:58:48,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:48,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:48,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 246 transitions, 3163 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:48,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:48,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:48,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:49,783 INFO L124 PetriNetUnfolderBase]: 3723/5836 cut-off events. [2024-06-21 17:58:49,783 INFO L125 PetriNetUnfolderBase]: For 205513/205513 co-relation queries the response was YES. [2024-06-21 17:58:49,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47316 conditions, 5836 events. 3723/5836 cut-off events. For 205513/205513 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34611 event pairs, 1119 based on Foata normal form. 4/5837 useless extension candidates. Maximal degree in co-relation 47237. Up to 5602 conditions per place. [2024-06-21 17:58:49,834 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-21 17:58:49,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 277 transitions, 3857 flow [2024-06-21 17:58:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:58:49,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:58:49,836 INFO L175 Difference]: Start difference. First operand has 157 places, 246 transitions, 3163 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:58:49,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 277 transitions, 3857 flow [2024-06-21 17:58:50,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 277 transitions, 3772 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:50,021 INFO L231 Difference]: Finished difference. Result has 159 places, 248 transitions, 3192 flow [2024-06-21 17:58:50,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3192, PETRI_PLACES=159, PETRI_TRANSITIONS=248} [2024-06-21 17:58:50,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-21 17:58:50,022 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 248 transitions, 3192 flow [2024-06-21 17:58:50,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:50,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:50,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:50,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:58:50,022 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)] === [2024-06-21 17:58:50,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1009372914, now seen corresponding path program 1 times [2024-06-21 17:58:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:50,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300637561] [2024-06-21 17:58:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:50,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:51,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:51,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300637561] [2024-06-21 17:58:51,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300637561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:51,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:51,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:51,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761470061] [2024-06-21 17:58:51,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:51,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:51,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:51,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:51,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:51,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:51,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 248 transitions, 3192 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:51,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:51,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:51,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:52,300 INFO L124 PetriNetUnfolderBase]: 3755/5886 cut-off events. [2024-06-21 17:58:52,301 INFO L125 PetriNetUnfolderBase]: For 218272/218272 co-relation queries the response was YES. [2024-06-21 17:58:52,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48093 conditions, 5886 events. 3755/5886 cut-off events. For 218272/218272 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 34850 event pairs, 1094 based on Foata normal form. 5/5888 useless extension candidates. Maximal degree in co-relation 48013. Up to 5523 conditions per place. [2024-06-21 17:58:52,353 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 221 selfloop transitions, 63 changer transitions 0/289 dead transitions. [2024-06-21 17:58:52,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 289 transitions, 4086 flow [2024-06-21 17:58:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 17:58:52,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-21 17:58:52,355 INFO L175 Difference]: Start difference. First operand has 159 places, 248 transitions, 3192 flow. Second operand 9 states and 188 transitions. [2024-06-21 17:58:52,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 289 transitions, 4086 flow [2024-06-21 17:58:52,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 289 transitions, 3992 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:52,549 INFO L231 Difference]: Finished difference. Result has 162 places, 253 transitions, 3386 flow [2024-06-21 17:58:52,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3386, PETRI_PLACES=162, PETRI_TRANSITIONS=253} [2024-06-21 17:58:52,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 17:58:52,550 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 253 transitions, 3386 flow [2024-06-21 17:58:52,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:52,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:52,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:52,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:58:52,551 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)] === [2024-06-21 17:58:52,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash 771724634, now seen corresponding path program 3 times [2024-06-21 17:58:52,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:52,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41759531] [2024-06-21 17:58:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:53,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41759531] [2024-06-21 17:58:53,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41759531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:53,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:53,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:53,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544161192] [2024-06-21 17:58:53,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:53,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:53,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:53,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 253 transitions, 3386 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:53,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:53,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:53,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:54,375 INFO L124 PetriNetUnfolderBase]: 3772/5921 cut-off events. [2024-06-21 17:58:54,375 INFO L125 PetriNetUnfolderBase]: For 231084/231084 co-relation queries the response was YES. [2024-06-21 17:58:54,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49621 conditions, 5921 events. 3772/5921 cut-off events. For 231084/231084 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35135 event pairs, 1108 based on Foata normal form. 4/5922 useless extension candidates. Maximal degree in co-relation 49540. Up to 5700 conditions per place. [2024-06-21 17:58:54,431 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 263 selfloop transitions, 16 changer transitions 0/284 dead transitions. [2024-06-21 17:58:54,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 284 transitions, 4113 flow [2024-06-21 17:58:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:58:54,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:58:54,432 INFO L175 Difference]: Start difference. First operand has 162 places, 253 transitions, 3386 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:58:54,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 284 transitions, 4113 flow [2024-06-21 17:58:54,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 284 transitions, 3871 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:54,659 INFO L231 Difference]: Finished difference. Result has 164 places, 257 transitions, 3280 flow [2024-06-21 17:58:54,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=164, PETRI_TRANSITIONS=257} [2024-06-21 17:58:54,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 17:58:54,660 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 257 transitions, 3280 flow [2024-06-21 17:58:54,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:54,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:54,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:54,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:58:54,660 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)] === [2024-06-21 17:58:54,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1033046448, now seen corresponding path program 2 times [2024-06-21 17:58:54,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:54,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498581812] [2024-06-21 17:58:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:54,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:55,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:55,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498581812] [2024-06-21 17:58:55,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498581812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:55,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:55,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428895153] [2024-06-21 17:58:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:55,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:55,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:55,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:55,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 257 transitions, 3280 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:55,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:55,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:55,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:56,768 INFO L124 PetriNetUnfolderBase]: 3828/6013 cut-off events. [2024-06-21 17:58:56,768 INFO L125 PetriNetUnfolderBase]: For 244486/244486 co-relation queries the response was YES. [2024-06-21 17:58:56,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50488 conditions, 6013 events. 3828/6013 cut-off events. For 244486/244486 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 35789 event pairs, 1067 based on Foata normal form. 5/6015 useless extension candidates. Maximal degree in co-relation 50405. Up to 5369 conditions per place. [2024-06-21 17:58:56,826 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 180 selfloop transitions, 123 changer transitions 0/308 dead transitions. [2024-06-21 17:58:56,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 308 transitions, 4566 flow [2024-06-21 17:58:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 17:58:56,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-21 17:58:56,827 INFO L175 Difference]: Start difference. First operand has 164 places, 257 transitions, 3280 flow. Second operand 9 states and 194 transitions. [2024-06-21 17:58:56,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 308 transitions, 4566 flow [2024-06-21 17:58:57,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 308 transitions, 4463 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:57,040 INFO L231 Difference]: Finished difference. Result has 170 places, 271 transitions, 3870 flow [2024-06-21 17:58:57,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3870, PETRI_PLACES=170, PETRI_TRANSITIONS=271} [2024-06-21 17:58:57,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-21 17:58:57,041 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 271 transitions, 3870 flow [2024-06-21 17:58:57,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:57,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:57,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:57,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:58:57,041 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)] === [2024-06-21 17:58:57,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:57,042 INFO L85 PathProgramCache]: Analyzing trace with hash 996048302, now seen corresponding path program 4 times [2024-06-21 17:58:57,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:57,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842390312] [2024-06-21 17:58:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:57,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:57,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:57,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842390312] [2024-06-21 17:58:57,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842390312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:57,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:57,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028821681] [2024-06-21 17:58:57,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:57,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:57,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:57,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:57,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 271 transitions, 3870 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:57,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:57,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:57,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:59,053 INFO L124 PetriNetUnfolderBase]: 3820/6004 cut-off events. [2024-06-21 17:58:59,053 INFO L125 PetriNetUnfolderBase]: For 261889/261889 co-relation queries the response was YES. [2024-06-21 17:58:59,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52375 conditions, 6004 events. 3820/6004 cut-off events. For 261889/261889 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 35775 event pairs, 1071 based on Foata normal form. 4/6002 useless extension candidates. Maximal degree in co-relation 52289. Up to 5740 conditions per place. [2024-06-21 17:58:59,106 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 272 selfloop transitions, 23 changer transitions 0/300 dead transitions. [2024-06-21 17:58:59,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 300 transitions, 4644 flow [2024-06-21 17:58:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:58:59,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:58:59,108 INFO L175 Difference]: Start difference. First operand has 170 places, 271 transitions, 3870 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:58:59,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 300 transitions, 4644 flow [2024-06-21 17:58:59,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 300 transitions, 4422 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:59,336 INFO L231 Difference]: Finished difference. Result has 176 places, 276 transitions, 3823 flow [2024-06-21 17:58:59,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3650, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3823, PETRI_PLACES=176, PETRI_TRANSITIONS=276} [2024-06-21 17:58:59,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-21 17:58:59,337 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 276 transitions, 3823 flow [2024-06-21 17:58:59,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:59,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:59,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:59,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:58:59,337 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)] === [2024-06-21 17:58:59,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:59,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1002719502, now seen corresponding path program 3 times [2024-06-21 17:58:59,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:59,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356822305] [2024-06-21 17:58:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:59,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:00,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:00,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356822305] [2024-06-21 17:59:00,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356822305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:00,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:00,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758744205] [2024-06-21 17:59:00,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:00,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:00,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:00,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:00,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 276 transitions, 3823 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:00,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:00,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:00,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:01,571 INFO L124 PetriNetUnfolderBase]: 3916/6178 cut-off events. [2024-06-21 17:59:01,571 INFO L125 PetriNetUnfolderBase]: For 281764/281764 co-relation queries the response was YES. [2024-06-21 17:59:01,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54029 conditions, 6178 events. 3916/6178 cut-off events. For 281764/281764 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 37217 event pairs, 859 based on Foata normal form. 5/6173 useless extension candidates. Maximal degree in co-relation 53940. Up to 5035 conditions per place. [2024-06-21 17:59:01,627 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 212 selfloop transitions, 119 changer transitions 0/336 dead transitions. [2024-06-21 17:59:01,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 336 transitions, 5491 flow [2024-06-21 17:59:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 17:59:01,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-21 17:59:01,631 INFO L175 Difference]: Start difference. First operand has 176 places, 276 transitions, 3823 flow. Second operand 9 states and 194 transitions. [2024-06-21 17:59:01,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 336 transitions, 5491 flow [2024-06-21 17:59:01,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 336 transitions, 5362 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:01,872 INFO L231 Difference]: Finished difference. Result has 183 places, 296 transitions, 4560 flow [2024-06-21 17:59:01,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4560, PETRI_PLACES=183, PETRI_TRANSITIONS=296} [2024-06-21 17:59:01,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-21 17:59:01,873 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 296 transitions, 4560 flow [2024-06-21 17:59:01,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:01,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:01,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:01,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:59:01,873 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:01,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash 649400590, now seen corresponding path program 4 times [2024-06-21 17:59:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:01,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807446402] [2024-06-21 17:59:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:01,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:02,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:02,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807446402] [2024-06-21 17:59:02,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807446402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:02,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:02,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314887214] [2024-06-21 17:59:02,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:02,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:02,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:02,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:02,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 296 transitions, 4560 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:02,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:02,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:02,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:04,245 INFO L124 PetriNetUnfolderBase]: 3960/6239 cut-off events. [2024-06-21 17:59:04,245 INFO L125 PetriNetUnfolderBase]: For 307644/307644 co-relation queries the response was YES. [2024-06-21 17:59:04,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57478 conditions, 6239 events. 3960/6239 cut-off events. For 307644/307644 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 37737 event pairs, 908 based on Foata normal form. 5/6238 useless extension candidates. Maximal degree in co-relation 57385. Up to 5117 conditions per place. [2024-06-21 17:59:04,302 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 248 selfloop transitions, 111 changer transitions 0/364 dead transitions. [2024-06-21 17:59:04,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 364 transitions, 6169 flow [2024-06-21 17:59:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:59:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:59:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-21 17:59:04,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144124168514412 [2024-06-21 17:59:04,303 INFO L175 Difference]: Start difference. First operand has 183 places, 296 transitions, 4560 flow. Second operand 11 states and 232 transitions. [2024-06-21 17:59:04,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 364 transitions, 6169 flow [2024-06-21 17:59:04,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 364 transitions, 5837 flow, removed 149 selfloop flow, removed 2 redundant places. [2024-06-21 17:59:04,643 INFO L231 Difference]: Finished difference. Result has 194 places, 315 transitions, 4950 flow [2024-06-21 17:59:04,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4950, PETRI_PLACES=194, PETRI_TRANSITIONS=315} [2024-06-21 17:59:04,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-21 17:59:04,645 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 315 transitions, 4950 flow [2024-06-21 17:59:04,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:04,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:04,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:04,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:59:04,645 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)] === [2024-06-21 17:59:04,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash -132706316, now seen corresponding path program 1 times [2024-06-21 17:59:04,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:04,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78096384] [2024-06-21 17:59:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:04,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:05,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:05,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78096384] [2024-06-21 17:59:05,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78096384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:05,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:05,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:05,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464599878] [2024-06-21 17:59:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:05,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:05,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:05,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 315 transitions, 4950 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:05,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:05,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:05,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:06,331 INFO L124 PetriNetUnfolderBase]: 4052/6390 cut-off events. [2024-06-21 17:59:06,331 INFO L125 PetriNetUnfolderBase]: For 327357/327357 co-relation queries the response was YES. [2024-06-21 17:59:06,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60272 conditions, 6390 events. 4052/6390 cut-off events. For 327357/327357 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38808 event pairs, 943 based on Foata normal form. 12/6396 useless extension candidates. Maximal degree in co-relation 60175. Up to 5487 conditions per place. [2024-06-21 17:59:06,398 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 277 selfloop transitions, 70 changer transitions 0/352 dead transitions. [2024-06-21 17:59:06,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 352 transitions, 6244 flow [2024-06-21 17:59:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 17:59:06,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-21 17:59:06,400 INFO L175 Difference]: Start difference. First operand has 194 places, 315 transitions, 4950 flow. Second operand 7 states and 142 transitions. [2024-06-21 17:59:06,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 352 transitions, 6244 flow [2024-06-21 17:59:06,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 352 transitions, 5968 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:06,824 INFO L231 Difference]: Finished difference. Result has 197 places, 328 transitions, 5123 flow [2024-06-21 17:59:06,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5123, PETRI_PLACES=197, PETRI_TRANSITIONS=328} [2024-06-21 17:59:06,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 17:59:06,825 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 328 transitions, 5123 flow [2024-06-21 17:59:06,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:06,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:06,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:06,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:59:06,826 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)] === [2024-06-21 17:59:06,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:06,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1102608034, now seen corresponding path program 2 times [2024-06-21 17:59:06,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:06,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847447967] [2024-06-21 17:59:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:06,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:07,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847447967] [2024-06-21 17:59:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847447967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:07,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:07,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:07,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17701314] [2024-06-21 17:59:07,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:07,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:07,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:07,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:07,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:07,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:07,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 328 transitions, 5123 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:07,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:07,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:07,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:08,718 INFO L124 PetriNetUnfolderBase]: 4082/6427 cut-off events. [2024-06-21 17:59:08,718 INFO L125 PetriNetUnfolderBase]: For 331195/331195 co-relation queries the response was YES. [2024-06-21 17:59:08,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61097 conditions, 6427 events. 4082/6427 cut-off events. For 331195/331195 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 39054 event pairs, 1094 based on Foata normal form. 6/6427 useless extension candidates. Maximal degree in co-relation 60997. Up to 6131 conditions per place. [2024-06-21 17:59:08,793 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 316 selfloop transitions, 23 changer transitions 0/344 dead transitions. [2024-06-21 17:59:08,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 344 transitions, 5950 flow [2024-06-21 17:59:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:59:08,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:59:08,794 INFO L175 Difference]: Start difference. First operand has 197 places, 328 transitions, 5123 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:59:08,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 344 transitions, 5950 flow [2024-06-21 17:59:09,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 344 transitions, 5856 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:09,132 INFO L231 Difference]: Finished difference. Result has 201 places, 332 transitions, 5177 flow [2024-06-21 17:59:09,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5177, PETRI_PLACES=201, PETRI_TRANSITIONS=332} [2024-06-21 17:59:09,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 17:59:09,133 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 332 transitions, 5177 flow [2024-06-21 17:59:09,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:09,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:09,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:09,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:59:09,134 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)] === [2024-06-21 17:59:09,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:09,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1679776036, now seen corresponding path program 3 times [2024-06-21 17:59:09,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:09,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190065667] [2024-06-21 17:59:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:09,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:09,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190065667] [2024-06-21 17:59:09,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190065667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:09,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:09,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307001516] [2024-06-21 17:59:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:09,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:09,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:09,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:09,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 332 transitions, 5177 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:09,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:09,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:09,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:10,958 INFO L124 PetriNetUnfolderBase]: 4072/6407 cut-off events. [2024-06-21 17:59:10,958 INFO L125 PetriNetUnfolderBase]: For 338123/338123 co-relation queries the response was YES. [2024-06-21 17:59:10,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60604 conditions, 6407 events. 4072/6407 cut-off events. For 338123/338123 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38932 event pairs, 1079 based on Foata normal form. 6/6407 useless extension candidates. Maximal degree in co-relation 60503. Up to 6012 conditions per place. [2024-06-21 17:59:11,021 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 308 selfloop transitions, 35 changer transitions 0/348 dead transitions. [2024-06-21 17:59:11,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 348 transitions, 6058 flow [2024-06-21 17:59:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:59:11,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 17:59:11,022 INFO L175 Difference]: Start difference. First operand has 201 places, 332 transitions, 5177 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:59:11,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 348 transitions, 6058 flow [2024-06-21 17:59:11,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 348 transitions, 5982 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:11,368 INFO L231 Difference]: Finished difference. Result has 203 places, 332 transitions, 5181 flow [2024-06-21 17:59:11,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5181, PETRI_PLACES=203, PETRI_TRANSITIONS=332} [2024-06-21 17:59:11,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 17:59:11,369 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 332 transitions, 5181 flow [2024-06-21 17:59:11,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:11,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:11,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:11,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:59:11,370 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:11,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1680022114, now seen corresponding path program 1 times [2024-06-21 17:59:11,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:11,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993116737] [2024-06-21 17:59:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:11,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:12,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993116737] [2024-06-21 17:59:12,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993116737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:12,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:12,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:12,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373091255] [2024-06-21 17:59:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:12,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:12,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:12,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:12,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 332 transitions, 5181 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:12,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:12,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:12,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:13,325 INFO L124 PetriNetUnfolderBase]: 4111/6485 cut-off events. [2024-06-21 17:59:13,325 INFO L125 PetriNetUnfolderBase]: For 354416/354416 co-relation queries the response was YES. [2024-06-21 17:59:13,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61210 conditions, 6485 events. 4111/6485 cut-off events. For 354416/354416 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39522 event pairs, 1085 based on Foata normal form. 14/6489 useless extension candidates. Maximal degree in co-relation 61110. Up to 6077 conditions per place. [2024-06-21 17:59:13,406 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 299 selfloop transitions, 46 changer transitions 0/350 dead transitions. [2024-06-21 17:59:13,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 350 transitions, 6033 flow [2024-06-21 17:59:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 17:59:13,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:59:13,407 INFO L175 Difference]: Start difference. First operand has 203 places, 332 transitions, 5181 flow. Second operand 7 states and 133 transitions. [2024-06-21 17:59:13,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 350 transitions, 6033 flow [2024-06-21 17:59:13,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 350 transitions, 5748 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-21 17:59:13,870 INFO L231 Difference]: Finished difference. Result has 200 places, 334 transitions, 5036 flow [2024-06-21 17:59:13,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5036, PETRI_PLACES=200, PETRI_TRANSITIONS=334} [2024-06-21 17:59:13,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-21 17:59:13,870 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 334 transitions, 5036 flow [2024-06-21 17:59:13,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:13,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:13,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:13,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:59:13,871 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)] === [2024-06-21 17:59:13,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:13,871 INFO L85 PathProgramCache]: Analyzing trace with hash 960414239, now seen corresponding path program 1 times [2024-06-21 17:59:13,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:13,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505973940] [2024-06-21 17:59:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:13,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:14,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505973940] [2024-06-21 17:59:14,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505973940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:14,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:14,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739346008] [2024-06-21 17:59:14,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:14,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:14,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:14,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 334 transitions, 5036 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:14,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:14,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:14,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:16,134 INFO L124 PetriNetUnfolderBase]: 4259/6733 cut-off events. [2024-06-21 17:59:16,134 INFO L125 PetriNetUnfolderBase]: For 364600/364600 co-relation queries the response was YES. [2024-06-21 17:59:16,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62952 conditions, 6733 events. 4259/6733 cut-off events. For 364600/364600 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41315 event pairs, 1092 based on Foata normal form. 6/6736 useless extension candidates. Maximal degree in co-relation 62855. Up to 6200 conditions per place. [2024-06-21 17:59:16,217 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 330 selfloop transitions, 71 changer transitions 0/406 dead transitions. [2024-06-21 17:59:16,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 406 transitions, 6689 flow [2024-06-21 17:59:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:59:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:59:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 17:59:16,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-21 17:59:16,218 INFO L175 Difference]: Start difference. First operand has 200 places, 334 transitions, 5036 flow. Second operand 10 states and 204 transitions. [2024-06-21 17:59:16,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 406 transitions, 6689 flow [2024-06-21 17:59:16,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 406 transitions, 6551 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:16,751 INFO L231 Difference]: Finished difference. Result has 209 places, 362 transitions, 5669 flow [2024-06-21 17:59:16,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4930, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5669, PETRI_PLACES=209, PETRI_TRANSITIONS=362} [2024-06-21 17:59:16,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-21 17:59:16,752 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 362 transitions, 5669 flow [2024-06-21 17:59:16,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:16,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:16,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:16,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:59:16,752 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)] === [2024-06-21 17:59:16,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1314507489, now seen corresponding path program 2 times [2024-06-21 17:59:16,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:16,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418152157] [2024-06-21 17:59:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:17,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:17,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418152157] [2024-06-21 17:59:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418152157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:17,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345575476] [2024-06-21 17:59:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:17,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:17,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:17,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 362 transitions, 5669 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:17,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:17,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:17,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:19,074 INFO L124 PetriNetUnfolderBase]: 4410/6957 cut-off events. [2024-06-21 17:59:19,074 INFO L125 PetriNetUnfolderBase]: For 408233/408233 co-relation queries the response was YES. [2024-06-21 17:59:19,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66534 conditions, 6957 events. 4410/6957 cut-off events. For 408233/408233 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 42646 event pairs, 951 based on Foata normal form. 14/6968 useless extension candidates. Maximal degree in co-relation 66432. Up to 6194 conditions per place. [2024-06-21 17:59:19,153 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 338 selfloop transitions, 70 changer transitions 0/413 dead transitions. [2024-06-21 17:59:19,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 413 transitions, 7125 flow [2024-06-21 17:59:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 17:59:19,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-21 17:59:19,154 INFO L175 Difference]: Start difference. First operand has 209 places, 362 transitions, 5669 flow. Second operand 9 states and 190 transitions. [2024-06-21 17:59:19,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 413 transitions, 7125 flow [2024-06-21 17:59:19,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 413 transitions, 6902 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:19,633 INFO L231 Difference]: Finished difference. Result has 217 places, 371 transitions, 5920 flow [2024-06-21 17:59:19,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5452, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5920, PETRI_PLACES=217, PETRI_TRANSITIONS=371} [2024-06-21 17:59:19,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-21 17:59:19,634 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 371 transitions, 5920 flow [2024-06-21 17:59:19,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:19,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:19,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:19,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:59:19,635 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)] === [2024-06-21 17:59:19,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1225941729, now seen corresponding path program 3 times [2024-06-21 17:59:19,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58630594] [2024-06-21 17:59:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:20,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:20,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58630594] [2024-06-21 17:59:20,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58630594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:20,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:20,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:20,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352457050] [2024-06-21 17:59:20,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:20,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:20,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:20,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:20,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 371 transitions, 5920 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:20,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:20,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:20,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:22,022 INFO L124 PetriNetUnfolderBase]: 4656/7327 cut-off events. [2024-06-21 17:59:22,023 INFO L125 PetriNetUnfolderBase]: For 464162/464162 co-relation queries the response was YES. [2024-06-21 17:59:22,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72019 conditions, 7327 events. 4656/7327 cut-off events. For 464162/464162 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45404 event pairs, 1152 based on Foata normal form. 16/7340 useless extension candidates. Maximal degree in co-relation 71914. Up to 6513 conditions per place. [2024-06-21 17:59:22,109 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 348 selfloop transitions, 70 changer transitions 0/423 dead transitions. [2024-06-21 17:59:22,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 423 transitions, 7546 flow [2024-06-21 17:59:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 17:59:22,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-21 17:59:22,110 INFO L175 Difference]: Start difference. First operand has 217 places, 371 transitions, 5920 flow. Second operand 9 states and 195 transitions. [2024-06-21 17:59:22,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 423 transitions, 7546 flow [2024-06-21 17:59:22,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 423 transitions, 7349 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:22,854 INFO L231 Difference]: Finished difference. Result has 223 places, 377 transitions, 6117 flow [2024-06-21 17:59:22,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6117, PETRI_PLACES=223, PETRI_TRANSITIONS=377} [2024-06-21 17:59:22,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-21 17:59:22,855 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 377 transitions, 6117 flow [2024-06-21 17:59:22,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:22,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:22,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:22,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:59:22,855 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:22,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1225793859, now seen corresponding path program 4 times [2024-06-21 17:59:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:22,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467947305] [2024-06-21 17:59:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:22,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:23,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:23,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467947305] [2024-06-21 17:59:23,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467947305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:23,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:23,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:23,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928406162] [2024-06-21 17:59:23,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:23,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:23,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:23,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 377 transitions, 6117 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:23,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:23,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:23,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:25,207 INFO L124 PetriNetUnfolderBase]: 4649/7326 cut-off events. [2024-06-21 17:59:25,208 INFO L125 PetriNetUnfolderBase]: For 456613/456613 co-relation queries the response was YES. [2024-06-21 17:59:25,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71843 conditions, 7326 events. 4649/7326 cut-off events. For 456613/456613 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 45478 event pairs, 1200 based on Foata normal form. 16/7339 useless extension candidates. Maximal degree in co-relation 71735. Up to 6763 conditions per place. [2024-06-21 17:59:25,297 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 342 selfloop transitions, 72 changer transitions 0/419 dead transitions. [2024-06-21 17:59:25,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 419 transitions, 7365 flow [2024-06-21 17:59:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 17:59:25,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-21 17:59:25,299 INFO L175 Difference]: Start difference. First operand has 223 places, 377 transitions, 6117 flow. Second operand 9 states and 190 transitions. [2024-06-21 17:59:25,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 419 transitions, 7365 flow [2024-06-21 17:59:26,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 419 transitions, 7161 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:26,045 INFO L231 Difference]: Finished difference. Result has 227 places, 380 transitions, 6201 flow [2024-06-21 17:59:26,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6201, PETRI_PLACES=227, PETRI_TRANSITIONS=380} [2024-06-21 17:59:26,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-21 17:59:26,046 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 380 transitions, 6201 flow [2024-06-21 17:59:26,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:26,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:26,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:26,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:59:26,047 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)] === [2024-06-21 17:59:26,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:26,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1225787907, now seen corresponding path program 1 times [2024-06-21 17:59:26,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:26,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975947606] [2024-06-21 17:59:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:26,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:27,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:27,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975947606] [2024-06-21 17:59:27,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975947606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:27,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:27,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:27,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69898773] [2024-06-21 17:59:27,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:27,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:27,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:27,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:27,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:27,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 380 transitions, 6201 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:27,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:27,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:27,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:28,768 INFO L124 PetriNetUnfolderBase]: 4884/7722 cut-off events. [2024-06-21 17:59:28,769 INFO L125 PetriNetUnfolderBase]: For 524441/524441 co-relation queries the response was YES. [2024-06-21 17:59:28,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75241 conditions, 7722 events. 4884/7722 cut-off events. For 524441/524441 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48619 event pairs, 1296 based on Foata normal form. 58/7777 useless extension candidates. Maximal degree in co-relation 75131. Up to 6673 conditions per place. [2024-06-21 17:59:28,860 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 341 selfloop transitions, 82 changer transitions 0/428 dead transitions. [2024-06-21 17:59:28,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 428 transitions, 7499 flow [2024-06-21 17:59:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:59:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:59:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-21 17:59:28,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-21 17:59:28,861 INFO L175 Difference]: Start difference. First operand has 227 places, 380 transitions, 6201 flow. Second operand 10 states and 212 transitions. [2024-06-21 17:59:28,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 428 transitions, 7499 flow [2024-06-21 17:59:29,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 428 transitions, 7320 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:29,501 INFO L231 Difference]: Finished difference. Result has 231 places, 382 transitions, 6316 flow [2024-06-21 17:59:29,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6022, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6316, PETRI_PLACES=231, PETRI_TRANSITIONS=382} [2024-06-21 17:59:29,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-21 17:59:29,502 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 382 transitions, 6316 flow [2024-06-21 17:59:29,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:29,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:29,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:29,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:59:29,502 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)] === [2024-06-21 17:59:29,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash -629308505, now seen corresponding path program 5 times [2024-06-21 17:59:29,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:29,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468137741] [2024-06-21 17:59:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:29,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:30,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:30,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468137741] [2024-06-21 17:59:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468137741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:30,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:30,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241638391] [2024-06-21 17:59:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:30,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:30,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 382 transitions, 6316 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:30,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:30,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:30,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:31,999 INFO L124 PetriNetUnfolderBase]: 4993/7886 cut-off events. [2024-06-21 17:59:31,999 INFO L125 PetriNetUnfolderBase]: For 507149/507149 co-relation queries the response was YES. [2024-06-21 17:59:32,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77308 conditions, 7886 events. 4993/7886 cut-off events. For 507149/507149 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 49777 event pairs, 1264 based on Foata normal form. 16/7899 useless extension candidates. Maximal degree in co-relation 77197. Up to 7347 conditions per place. [2024-06-21 17:59:32,092 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 367 selfloop transitions, 58 changer transitions 0/430 dead transitions. [2024-06-21 17:59:32,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 430 transitions, 7709 flow [2024-06-21 17:59:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 17:59:32,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 17:59:32,093 INFO L175 Difference]: Start difference. First operand has 231 places, 382 transitions, 6316 flow. Second operand 9 states and 189 transitions. [2024-06-21 17:59:32,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 430 transitions, 7709 flow [2024-06-21 17:59:32,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 430 transitions, 7489 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:32,889 INFO L231 Difference]: Finished difference. Result has 233 places, 391 transitions, 6471 flow [2024-06-21 17:59:32,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6471, PETRI_PLACES=233, PETRI_TRANSITIONS=391} [2024-06-21 17:59:32,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-21 17:59:32,890 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 391 transitions, 6471 flow [2024-06-21 17:59:32,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:32,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:32,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:32,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:59:32,890 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)] === [2024-06-21 17:59:32,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:32,891 INFO L85 PathProgramCache]: Analyzing trace with hash -828610295, now seen corresponding path program 6 times [2024-06-21 17:59:32,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:32,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890580789] [2024-06-21 17:59:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:32,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:33,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:33,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890580789] [2024-06-21 17:59:33,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890580789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:33,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:33,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:33,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802018415] [2024-06-21 17:59:33,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:33,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:33,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:33,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 391 transitions, 6471 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:33,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:33,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:33,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:35,529 INFO L124 PetriNetUnfolderBase]: 5032/7956 cut-off events. [2024-06-21 17:59:35,529 INFO L125 PetriNetUnfolderBase]: For 510845/510845 co-relation queries the response was YES. [2024-06-21 17:59:35,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77728 conditions, 7956 events. 5032/7956 cut-off events. For 510845/510845 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 50332 event pairs, 1317 based on Foata normal form. 16/7969 useless extension candidates. Maximal degree in co-relation 77615. Up to 7412 conditions per place. [2024-06-21 17:59:35,628 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 374 selfloop transitions, 55 changer transitions 0/434 dead transitions. [2024-06-21 17:59:35,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 434 transitions, 7863 flow [2024-06-21 17:59:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 17:59:35,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 17:59:35,629 INFO L175 Difference]: Start difference. First operand has 233 places, 391 transitions, 6471 flow. Second operand 9 states and 189 transitions. [2024-06-21 17:59:35,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 434 transitions, 7863 flow [2024-06-21 17:59:36,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 434 transitions, 7672 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:36,458 INFO L231 Difference]: Finished difference. Result has 237 places, 395 transitions, 6558 flow [2024-06-21 17:59:36,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6558, PETRI_PLACES=237, PETRI_TRANSITIONS=395} [2024-06-21 17:59:36,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-21 17:59:36,458 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 395 transitions, 6558 flow [2024-06-21 17:59:36,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:36,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:36,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:36,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:59:36,459 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)] === [2024-06-21 17:59:36,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:36,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1846338829, now seen corresponding path program 7 times [2024-06-21 17:59:36,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:36,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102401555] [2024-06-21 17:59:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:37,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:37,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102401555] [2024-06-21 17:59:37,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102401555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:37,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:37,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:37,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026516585] [2024-06-21 17:59:37,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:37,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:37,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:37,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:37,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:37,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 395 transitions, 6558 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:37,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:37,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:37,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:39,210 INFO L124 PetriNetUnfolderBase]: 5194/8206 cut-off events. [2024-06-21 17:59:39,210 INFO L125 PetriNetUnfolderBase]: For 551927/551927 co-relation queries the response was YES. [2024-06-21 17:59:39,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81354 conditions, 8206 events. 5194/8206 cut-off events. For 551927/551927 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52182 event pairs, 1325 based on Foata normal form. 16/8219 useless extension candidates. Maximal degree in co-relation 81239. Up to 7340 conditions per place. [2024-06-21 17:59:39,303 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 381 selfloop transitions, 59 changer transitions 0/445 dead transitions. [2024-06-21 17:59:39,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 445 transitions, 8250 flow [2024-06-21 17:59:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 17:59:39,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-21 17:59:39,305 INFO L175 Difference]: Start difference. First operand has 237 places, 395 transitions, 6558 flow. Second operand 9 states and 193 transitions. [2024-06-21 17:59:39,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 445 transitions, 8250 flow [2024-06-21 17:59:40,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 445 transitions, 8090 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:40,071 INFO L231 Difference]: Finished difference. Result has 243 places, 401 transitions, 6798 flow [2024-06-21 17:59:40,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6798, PETRI_PLACES=243, PETRI_TRANSITIONS=401} [2024-06-21 17:59:40,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-21 17:59:40,072 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 401 transitions, 6798 flow [2024-06-21 17:59:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:40,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:40,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:40,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:59:40,073 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)] === [2024-06-21 17:59:40,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash -621950903, now seen corresponding path program 2 times [2024-06-21 17:59:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763696388] [2024-06-21 17:59:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:40,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:40,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:40,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763696388] [2024-06-21 17:59:40,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763696388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:40,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:40,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:40,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979010215] [2024-06-21 17:59:40,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:40,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:40,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:41,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:41,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 401 transitions, 6798 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:41,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:41,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:41,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:43,118 INFO L124 PetriNetUnfolderBase]: 5429/8613 cut-off events. [2024-06-21 17:59:43,118 INFO L125 PetriNetUnfolderBase]: For 647740/647740 co-relation queries the response was YES. [2024-06-21 17:59:43,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85683 conditions, 8613 events. 5429/8613 cut-off events. For 647740/647740 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 55455 event pairs, 1373 based on Foata normal form. 58/8668 useless extension candidates. Maximal degree in co-relation 85566. Up to 7396 conditions per place. [2024-06-21 17:59:43,226 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 294 selfloop transitions, 151 changer transitions 0/450 dead transitions. [2024-06-21 17:59:43,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 450 transitions, 8364 flow [2024-06-21 17:59:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:59:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:59:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-21 17:59:43,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-21 17:59:43,228 INFO L175 Difference]: Start difference. First operand has 243 places, 401 transitions, 6798 flow. Second operand 10 states and 217 transitions. [2024-06-21 17:59:43,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 450 transitions, 8364 flow [2024-06-21 17:59:44,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 450 transitions, 8188 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:44,060 INFO L231 Difference]: Finished difference. Result has 249 places, 403 transitions, 7062 flow [2024-06-21 17:59:44,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6622, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7062, PETRI_PLACES=249, PETRI_TRANSITIONS=403} [2024-06-21 17:59:44,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 17:59:44,060 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 403 transitions, 7062 flow [2024-06-21 17:59:44,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:44,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:44,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:44,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:59:44,061 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)] === [2024-06-21 17:59:44,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:44,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1846185007, now seen corresponding path program 3 times [2024-06-21 17:59:44,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:44,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9086792] [2024-06-21 17:59:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:44,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9086792] [2024-06-21 17:59:45,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9086792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:45,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:45,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:45,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630956961] [2024-06-21 17:59:45,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:45,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:45,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:45,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 403 transitions, 7062 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:45,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:45,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:45,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:47,470 INFO L124 PetriNetUnfolderBase]: 5696/9064 cut-off events. [2024-06-21 17:59:47,470 INFO L125 PetriNetUnfolderBase]: For 682615/682615 co-relation queries the response was YES. [2024-06-21 17:59:47,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89918 conditions, 9064 events. 5696/9064 cut-off events. For 682615/682615 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 59141 event pairs, 1518 based on Foata normal form. 58/9119 useless extension candidates. Maximal degree in co-relation 89799. Up to 8178 conditions per place. [2024-06-21 17:59:47,595 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 392 selfloop transitions, 59 changer transitions 0/456 dead transitions. [2024-06-21 17:59:47,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 456 transitions, 8608 flow [2024-06-21 17:59:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:59:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:59:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 17:59:47,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 17:59:47,596 INFO L175 Difference]: Start difference. First operand has 249 places, 403 transitions, 7062 flow. Second operand 10 states and 210 transitions. [2024-06-21 17:59:47,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 456 transitions, 8608 flow [2024-06-21 17:59:48,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 456 transitions, 8220 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:48,578 INFO L231 Difference]: Finished difference. Result has 252 places, 410 transitions, 7007 flow [2024-06-21 17:59:48,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6684, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7007, PETRI_PLACES=252, PETRI_TRANSITIONS=410} [2024-06-21 17:59:48,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-21 17:59:48,579 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 410 transitions, 7007 flow [2024-06-21 17:59:48,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:48,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:48,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:59:48,579 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)] === [2024-06-21 17:59:48,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash -907581285, now seen corresponding path program 4 times [2024-06-21 17:59:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:48,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129869429] [2024-06-21 17:59:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:49,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129869429] [2024-06-21 17:59:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129869429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:49,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:49,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057504091] [2024-06-21 17:59:49,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:49,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:49,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:49,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:49,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 410 transitions, 7007 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:49,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:49,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:49,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:52,057 INFO L124 PetriNetUnfolderBase]: 5893/9402 cut-off events. [2024-06-21 17:59:52,058 INFO L125 PetriNetUnfolderBase]: For 695550/695550 co-relation queries the response was YES. [2024-06-21 17:59:52,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91731 conditions, 9402 events. 5893/9402 cut-off events. For 695550/695550 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 62021 event pairs, 1618 based on Foata normal form. 58/9457 useless extension candidates. Maximal degree in co-relation 91610. Up to 8521 conditions per place. [2024-06-21 17:59:52,178 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 390 selfloop transitions, 62 changer transitions 0/457 dead transitions. [2024-06-21 17:59:52,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 457 transitions, 8380 flow [2024-06-21 17:59:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:59:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:59:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 17:59:52,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 17:59:52,179 INFO L175 Difference]: Start difference. First operand has 252 places, 410 transitions, 7007 flow. Second operand 10 states and 210 transitions. [2024-06-21 17:59:52,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 457 transitions, 8380 flow [2024-06-21 17:59:53,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 457 transitions, 8205 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:53,166 INFO L231 Difference]: Finished difference. Result has 256 places, 412 transitions, 7080 flow [2024-06-21 17:59:53,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6832, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7080, PETRI_PLACES=256, PETRI_TRANSITIONS=412} [2024-06-21 17:59:53,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-21 17:59:53,167 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 412 transitions, 7080 flow [2024-06-21 17:59:53,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:53,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:53,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:53,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:59:53,167 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:53,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:53,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1639264657, now seen corresponding path program 5 times [2024-06-21 17:59:53,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:53,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929067081] [2024-06-21 17:59:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:53,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:54,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:54,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929067081] [2024-06-21 17:59:54,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929067081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:54,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:54,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:54,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756233466] [2024-06-21 17:59:54,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:54,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:54,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:54,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:54,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:54,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:54,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 412 transitions, 7080 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:54,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:54,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:54,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:56,768 INFO L124 PetriNetUnfolderBase]: 6480/10449 cut-off events. [2024-06-21 17:59:56,768 INFO L125 PetriNetUnfolderBase]: For 810150/810150 co-relation queries the response was YES. [2024-06-21 17:59:56,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101591 conditions, 10449 events. 6480/10449 cut-off events. For 810150/810150 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 71171 event pairs, 1723 based on Foata normal form. 54/10500 useless extension candidates. Maximal degree in co-relation 101469. Up to 7363 conditions per place. [2024-06-21 17:59:56,894 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 375 selfloop transitions, 92 changer transitions 0/472 dead transitions. [2024-06-21 17:59:56,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 472 transitions, 8925 flow [2024-06-21 17:59:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:59:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:59:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-21 17:59:56,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-21 17:59:56,895 INFO L175 Difference]: Start difference. First operand has 256 places, 412 transitions, 7080 flow. Second operand 10 states and 219 transitions. [2024-06-21 17:59:56,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 472 transitions, 8925 flow [2024-06-21 17:59:58,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 472 transitions, 8732 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:58,045 INFO L231 Difference]: Finished difference. Result has 260 places, 417 transitions, 7360 flow [2024-06-21 17:59:58,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6887, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7360, PETRI_PLACES=260, PETRI_TRANSITIONS=417} [2024-06-21 17:59:58,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 17:59:58,046 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 417 transitions, 7360 flow [2024-06-21 17:59:58,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:58,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:58,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:58,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:59:58,047 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)] === [2024-06-21 17:59:58,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash 127064954, now seen corresponding path program 1 times [2024-06-21 17:59:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:58,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231979027] [2024-06-21 17:59:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:58,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:58,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:58,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231979027] [2024-06-21 17:59:58,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231979027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:58,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:58,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:58,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340029041] [2024-06-21 17:59:58,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:58,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:58,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:58,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 417 transitions, 7360 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:58,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:58,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:58,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:01,095 INFO L124 PetriNetUnfolderBase]: 6468/10406 cut-off events. [2024-06-21 18:00:01,095 INFO L125 PetriNetUnfolderBase]: For 756722/756722 co-relation queries the response was YES. [2024-06-21 18:00:01,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101799 conditions, 10406 events. 6468/10406 cut-off events. For 756722/756722 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 70637 event pairs, 2052 based on Foata normal form. 4/10407 useless extension candidates. Maximal degree in co-relation 101676. Up to 9918 conditions per place. [2024-06-21 18:00:01,214 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 381 selfloop transitions, 52 changer transitions 0/438 dead transitions. [2024-06-21 18:00:01,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 438 transitions, 8427 flow [2024-06-21 18:00:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:00:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:00:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 18:00:01,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-21 18:00:01,215 INFO L175 Difference]: Start difference. First operand has 260 places, 417 transitions, 7360 flow. Second operand 7 states and 141 transitions. [2024-06-21 18:00:01,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 438 transitions, 8427 flow [2024-06-21 18:00:02,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 438 transitions, 8244 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 18:00:02,783 INFO L231 Difference]: Finished difference. Result has 262 places, 417 transitions, 7295 flow [2024-06-21 18:00:02,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7295, PETRI_PLACES=262, PETRI_TRANSITIONS=417} [2024-06-21 18:00:02,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-21 18:00:02,784 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 417 transitions, 7295 flow [2024-06-21 18:00:02,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:02,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:02,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:02,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:00:02,785 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:02,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1749247198, now seen corresponding path program 2 times [2024-06-21 18:00:02,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:02,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302565376] [2024-06-21 18:00:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:02,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:03,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:03,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302565376] [2024-06-21 18:00:03,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302565376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:03,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:03,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:00:03,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408767160] [2024-06-21 18:00:03,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:03,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:00:03,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:03,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:00:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:00:03,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:03,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 417 transitions, 7295 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:03,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:03,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:03,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:06,172 INFO L124 PetriNetUnfolderBase]: 6478/10428 cut-off events. [2024-06-21 18:00:06,172 INFO L125 PetriNetUnfolderBase]: For 755831/755831 co-relation queries the response was YES. [2024-06-21 18:00:06,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101693 conditions, 10428 events. 6478/10428 cut-off events. For 755831/755831 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 70767 event pairs, 2134 based on Foata normal form. 2/10427 useless extension candidates. Maximal degree in co-relation 101568. Up to 10076 conditions per place. [2024-06-21 18:00:06,424 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 404 selfloop transitions, 30 changer transitions 0/439 dead transitions. [2024-06-21 18:00:06,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 439 transitions, 8377 flow [2024-06-21 18:00:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:00:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:00:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 18:00:06,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-21 18:00:06,426 INFO L175 Difference]: Start difference. First operand has 262 places, 417 transitions, 7295 flow. Second operand 7 states and 131 transitions. [2024-06-21 18:00:06,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 439 transitions, 8377 flow [2024-06-21 18:00:07,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 439 transitions, 8287 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:07,778 INFO L231 Difference]: Finished difference. Result has 265 places, 423 transitions, 7427 flow [2024-06-21 18:00:07,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7210, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7427, PETRI_PLACES=265, PETRI_TRANSITIONS=423} [2024-06-21 18:00:07,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 18:00:07,779 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 423 transitions, 7427 flow [2024-06-21 18:00:07,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:07,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:07,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:07,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:00:07,780 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)] === [2024-06-21 18:00:07,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 812727583, now seen corresponding path program 8 times [2024-06-21 18:00:07,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:07,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32931686] [2024-06-21 18:00:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:07,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:08,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:08,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32931686] [2024-06-21 18:00:08,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32931686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:08,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:08,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:08,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546985333] [2024-06-21 18:00:08,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:08,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:08,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:08,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:08,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:08,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:08,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 423 transitions, 7427 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:08,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:08,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:08,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:11,878 INFO L124 PetriNetUnfolderBase]: 6648/10719 cut-off events. [2024-06-21 18:00:11,878 INFO L125 PetriNetUnfolderBase]: For 833901/833901 co-relation queries the response was YES. [2024-06-21 18:00:11,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105359 conditions, 10719 events. 6648/10719 cut-off events. For 833901/833901 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 73371 event pairs, 1793 based on Foata normal form. 16/10726 useless extension candidates. Maximal degree in co-relation 105233. Up to 9200 conditions per place. [2024-06-21 18:00:12,057 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 392 selfloop transitions, 93 changer transitions 0/490 dead transitions. [2024-06-21 18:00:12,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 490 transitions, 9707 flow [2024-06-21 18:00:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 18:00:12,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-21 18:00:12,059 INFO L175 Difference]: Start difference. First operand has 265 places, 423 transitions, 7427 flow. Second operand 9 states and 195 transitions. [2024-06-21 18:00:12,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 490 transitions, 9707 flow [2024-06-21 18:00:13,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 490 transitions, 9634 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:13,531 INFO L231 Difference]: Finished difference. Result has 272 places, 440 transitions, 8062 flow [2024-06-21 18:00:13,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7354, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8062, PETRI_PLACES=272, PETRI_TRANSITIONS=440} [2024-06-21 18:00:13,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 18:00:13,532 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 440 transitions, 8062 flow [2024-06-21 18:00:13,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:13,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:13,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:13,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:00:13,533 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)] === [2024-06-21 18:00:13,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1029450695, now seen corresponding path program 6 times [2024-06-21 18:00:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:13,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924557782] [2024-06-21 18:00:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:13,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:14,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:14,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924557782] [2024-06-21 18:00:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924557782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:14,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:14,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:14,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328470230] [2024-06-21 18:00:14,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:14,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:14,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:14,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 440 transitions, 8062 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:14,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:14,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:14,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:18,567 INFO L124 PetriNetUnfolderBase]: 8197/13401 cut-off events. [2024-06-21 18:00:18,568 INFO L125 PetriNetUnfolderBase]: For 1169692/1169692 co-relation queries the response was YES. [2024-06-21 18:00:18,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132784 conditions, 13401 events. 8197/13401 cut-off events. For 1169692/1169692 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 96666 event pairs, 2362 based on Foata normal form. 48/13432 useless extension candidates. Maximal degree in co-relation 132655. Up to 6244 conditions per place. [2024-06-21 18:00:18,762 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 285 selfloop transitions, 242 changer transitions 0/532 dead transitions. [2024-06-21 18:00:18,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 532 transitions, 11162 flow [2024-06-21 18:00:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:00:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:00:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 18:00:18,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-21 18:00:18,764 INFO L175 Difference]: Start difference. First operand has 272 places, 440 transitions, 8062 flow. Second operand 10 states and 226 transitions. [2024-06-21 18:00:18,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 532 transitions, 11162 flow [2024-06-21 18:00:20,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 532 transitions, 10829 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:20,825 INFO L231 Difference]: Finished difference. Result has 282 places, 459 transitions, 9133 flow [2024-06-21 18:00:20,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9133, PETRI_PLACES=282, PETRI_TRANSITIONS=459} [2024-06-21 18:00:20,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 18:00:20,826 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 459 transitions, 9133 flow [2024-06-21 18:00:20,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:20,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:20,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:20,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:00:20,827 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)] === [2024-06-21 18:00:20,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:20,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1343409395, now seen corresponding path program 7 times [2024-06-21 18:00:20,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372915706] [2024-06-21 18:00:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:21,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:21,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372915706] [2024-06-21 18:00:21,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372915706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:21,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:21,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433781165] [2024-06-21 18:00:21,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:21,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:21,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:21,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:22,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:22,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 459 transitions, 9133 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:22,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:22,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:22,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:26,339 INFO L124 PetriNetUnfolderBase]: 8851/14564 cut-off events. [2024-06-21 18:00:26,340 INFO L125 PetriNetUnfolderBase]: For 1412180/1412180 co-relation queries the response was YES. [2024-06-21 18:00:26,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149601 conditions, 14564 events. 8851/14564 cut-off events. For 1412180/1412180 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 108072 event pairs, 2894 based on Foata normal form. 72/14627 useless extension candidates. Maximal degree in co-relation 149467. Up to 10938 conditions per place. [2024-06-21 18:00:26,538 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 372 selfloop transitions, 151 changer transitions 0/528 dead transitions. [2024-06-21 18:00:26,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 528 transitions, 11545 flow [2024-06-21 18:00:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:00:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:00:26,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-21 18:00:26,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541019955654102 [2024-06-21 18:00:26,540 INFO L175 Difference]: Start difference. First operand has 282 places, 459 transitions, 9133 flow. Second operand 11 states and 244 transitions. [2024-06-21 18:00:26,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 528 transitions, 11545 flow [2024-06-21 18:00:28,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 528 transitions, 11359 flow, removed 71 selfloop flow, removed 2 redundant places. [2024-06-21 18:00:28,908 INFO L231 Difference]: Finished difference. Result has 291 places, 464 transitions, 9573 flow [2024-06-21 18:00:28,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8947, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9573, PETRI_PLACES=291, PETRI_TRANSITIONS=464} [2024-06-21 18:00:28,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-21 18:00:28,909 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 464 transitions, 9573 flow [2024-06-21 18:00:28,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:28,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:28,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:28,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:00:28,909 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)] === [2024-06-21 18:00:28,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1598728053, now seen corresponding path program 8 times [2024-06-21 18:00:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:28,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213088750] [2024-06-21 18:00:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:28,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:29,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:29,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213088750] [2024-06-21 18:00:29,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213088750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:29,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:29,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:29,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806782639] [2024-06-21 18:00:29,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:29,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:29,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:29,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:30,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:30,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 464 transitions, 9573 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:30,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:30,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:30,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:34,437 INFO L124 PetriNetUnfolderBase]: 9230/15180 cut-off events. [2024-06-21 18:00:34,437 INFO L125 PetriNetUnfolderBase]: For 1502469/1502469 co-relation queries the response was YES. [2024-06-21 18:00:34,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156427 conditions, 15180 events. 9230/15180 cut-off events. For 1502469/1502469 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 113617 event pairs, 3154 based on Foata normal form. 85/15248 useless extension candidates. Maximal degree in co-relation 156291. Up to 13022 conditions per place. [2024-06-21 18:00:34,664 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 343 selfloop transitions, 182 changer transitions 0/530 dead transitions. [2024-06-21 18:00:34,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 530 transitions, 11870 flow [2024-06-21 18:00:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:00:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:00:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 18:00:34,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-21 18:00:34,666 INFO L175 Difference]: Start difference. First operand has 291 places, 464 transitions, 9573 flow. Second operand 10 states and 218 transitions. [2024-06-21 18:00:34,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 530 transitions, 11870 flow [2024-06-21 18:00:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 530 transitions, 11549 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:37,063 INFO L231 Difference]: Finished difference. Result has 297 places, 479 transitions, 10159 flow [2024-06-21 18:00:37,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9260, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10159, PETRI_PLACES=297, PETRI_TRANSITIONS=479} [2024-06-21 18:00:37,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-21 18:00:37,064 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 479 transitions, 10159 flow [2024-06-21 18:00:37,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:37,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:37,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:37,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:00:37,064 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)] === [2024-06-21 18:00:37,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:37,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1343416835, now seen corresponding path program 9 times [2024-06-21 18:00:37,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:37,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954510078] [2024-06-21 18:00:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:37,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:37,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:37,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954510078] [2024-06-21 18:00:37,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954510078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:37,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:37,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:37,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915368565] [2024-06-21 18:00:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:37,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:38,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:38,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 479 transitions, 10159 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:38,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:38,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:38,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:42,940 INFO L124 PetriNetUnfolderBase]: 9266/15276 cut-off events. [2024-06-21 18:00:42,940 INFO L125 PetriNetUnfolderBase]: For 1484194/1484194 co-relation queries the response was YES. [2024-06-21 18:00:43,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155647 conditions, 15276 events. 9266/15276 cut-off events. For 1484194/1484194 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 115131 event pairs, 3116 based on Foata normal form. 85/15344 useless extension candidates. Maximal degree in co-relation 155506. Up to 12702 conditions per place. [2024-06-21 18:00:43,175 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 285 selfloop transitions, 247 changer transitions 0/537 dead transitions. [2024-06-21 18:00:43,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 537 transitions, 12272 flow [2024-06-21 18:00:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:00:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:00:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 18:00:43,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-21 18:00:43,177 INFO L175 Difference]: Start difference. First operand has 297 places, 479 transitions, 10159 flow. Second operand 10 states and 218 transitions. [2024-06-21 18:00:43,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 537 transitions, 12272 flow [2024-06-21 18:00:45,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 537 transitions, 11880 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:45,578 INFO L231 Difference]: Finished difference. Result has 306 places, 486 transitions, 10581 flow [2024-06-21 18:00:45,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9767, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10581, PETRI_PLACES=306, PETRI_TRANSITIONS=486} [2024-06-21 18:00:45,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 18:00:45,579 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 486 transitions, 10581 flow [2024-06-21 18:00:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:45,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:45,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:45,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:00:45,580 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1019801755, now seen corresponding path program 10 times [2024-06-21 18:00:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:45,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185576810] [2024-06-21 18:00:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:46,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185576810] [2024-06-21 18:00:46,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185576810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:46,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:46,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263321233] [2024-06-21 18:00:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:46,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:46,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 486 transitions, 10581 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:46,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:46,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:46,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand