./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.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/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:31:44,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:31:45,005 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:31:45,008 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:31:45,009 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:31:45,021 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:31:45,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:31:45,022 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:31:45,022 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:31:45,023 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:31:45,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:31:45,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:31:45,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:31:45,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:31:45,024 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:31:45,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:31:45,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:31:45,025 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:31:45,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:31:45,025 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:31:45,025 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:31:45,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:31:45,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:31:45,026 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:31:45,027 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:31:45,027 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:31:45,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:31:45,027 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:31:45,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:31:45,028 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:31:45,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:31:45,028 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:31:45,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:31:45,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:31:45,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:31:45,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:31:45,029 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:31:45,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:31:45,030 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:31:45,030 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:31:45,030 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:31:45,030 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:31:45,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:31:45,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:31:45,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:31:45,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:31:45,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:31:45,264 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:31:45,265 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:31:45,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:31:46,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:31:46,506 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:31:46,506 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:31:46,517 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1becdbc/2cdcd655ef024945b4737ce3d0b9361e/FLAG9b7e600dc [2024-06-21 17:31:46,526 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1becdbc/2cdcd655ef024945b4737ce3d0b9361e [2024-06-21 17:31:46,528 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:31:46,529 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:31:46,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 17:31:46,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:31:46,634 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:31:46,635 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:31:46,635 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:31:46,638 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:31:46,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:31:46" (1/2) ... [2024-06-21 17:31:46,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79395262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:46, skipping insertion in model container [2024-06-21 17:31:46,648 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:31:46" (1/2) ... [2024-06-21 17:31:46,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@eb9d66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:46, skipping insertion in model container [2024-06-21 17:31:46,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:31:46" (2/2) ... [2024-06-21 17:31:46,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79395262 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:31:46, skipping insertion in model container [2024-06-21 17:31:46,650 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:31:46" (2/2) ... [2024-06-21 17:31:46,650 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:31:46,722 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:31:46,723 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) [2024-06-21 17:31:46,723 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) [2024-06-21 17:31:46,723 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) [2024-06-21 17:31:46,723 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:31:46,723 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-21 17:31:46,767 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:31:47,060 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:31:47,068 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:31:47,196 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:31:47,231 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:31:47,231 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:31:47 WrapperNode [2024-06-21 17:31:47,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:31:47,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:31:47,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:31:47,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:31:47,238 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,267 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,299 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-21 17:31:47,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:31:47,301 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:31:47,301 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:31:47,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:31:47,310 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,310 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,324 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,340 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 17:31:47,345 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,345 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,354 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,362 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,363 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,370 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,373 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:31:47,375 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:31:47,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:31:47,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:31:47,377 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 05:31:47" (1/1) ... [2024-06-21 17:31:47,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:31:47,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:31:47,414 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 17:31:47,439 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 17:31:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:31:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:31:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:31:47,464 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:31:47,476 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:31:47,477 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:31:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:31:47,477 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:31:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:31:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:31:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:31:47,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:31:47,479 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 17:31:47,570 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:31:47,572 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:31:47,855 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:31:47,856 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:31:47,965 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:31:47,965 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:31:47,965 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:31:47 BoogieIcfgContainer [2024-06-21 17:31:47,965 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:31:47,967 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:31:47,967 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:31:47,969 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:31:47,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:31:46" (1/4) ... [2024-06-21 17:31:47,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293f6ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:31:47, skipping insertion in model container [2024-06-21 17:31:47,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:31:46" (2/4) ... [2024-06-21 17:31:47,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293f6ee3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:31:47, skipping insertion in model container [2024-06-21 17:31:47,972 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 05:31:47" (3/4) ... [2024-06-21 17:31:47,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293f6ee3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:31:47, skipping insertion in model container [2024-06-21 17:31:47,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:31:47" (4/4) ... [2024-06-21 17:31:47,974 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:31:47,987 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:31:47,987 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:31:47,987 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:31:48,031 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:31:48,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:31:48,108 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 17:31:48,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:31:48,119 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 68 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 17:31:48,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:31:48,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 17:31:48,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:31:48,141 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;@1a3cf5eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:31:48,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:31:48,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:31:48,147 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:31:48,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:31:48,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:48,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:31:48,148 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 17:31:48,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash 362811812, now seen corresponding path program 1 times [2024-06-21 17:31:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:48,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776211482] [2024-06-21 17:31:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:48,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:48,908 INFO 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 17:31:48,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776211482] [2024-06-21 17:31:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776211482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:48,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:48,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:31:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831081941] [2024-06-21 17:31:48,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:48,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:31:48,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:48,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:31:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:31:48,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-21 17:31:48,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:48,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:48,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-21 17:31:48,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:49,225 INFO L124 PetriNetUnfolderBase]: 1152/1761 cut-off events. [2024-06-21 17:31:49,225 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 17:31:49,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3578 conditions, 1761 events. 1152/1761 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8407 event pairs, 785 based on Foata normal form. 1/1725 useless extension candidates. Maximal degree in co-relation 3566. Up to 1732 conditions per place. [2024-06-21 17:31:49,237 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 17:31:49,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-21 17:31:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:31:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:31:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-21 17:31:49,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 17:31:49,247 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 77 transitions. [2024-06-21 17:31:49,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-21 17:31:49,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:49,250 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 17:31:49,252 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 17:31:49,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 17:31:49,254 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 17:31:49,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:49,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:49,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:49,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:31:49,255 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 17:31:49,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash 769830979, now seen corresponding path program 1 times [2024-06-21 17:31:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450161490] [2024-06-21 17:31:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:49,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:49,782 INFO 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 17:31:49,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:49,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450161490] [2024-06-21 17:31:49,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450161490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:49,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:49,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:31:49,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272659030] [2024-06-21 17:31:49,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:49,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:31:49,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:31:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:31:49,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-21 17:31:49,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:49,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:49,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-21 17:31:49,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:50,047 INFO L124 PetriNetUnfolderBase]: 1168/1795 cut-off events. [2024-06-21 17:31:50,047 INFO L125 PetriNetUnfolderBase]: For 366/374 co-relation queries the response was YES. [2024-06-21 17:31:50,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4128 conditions, 1795 events. 1168/1795 cut-off events. For 366/374 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8694 event pairs, 595 based on Foata normal form. 13/1806 useless extension candidates. Maximal degree in co-relation 4116. Up to 1669 conditions per place. [2024-06-21 17:31:50,056 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2024-06-21 17:31:50,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 282 flow [2024-06-21 17:31:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:31:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:31:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-21 17:31:50,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 17:31:50,058 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 108 transitions. [2024-06-21 17:31:50,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 282 flow [2024-06-21 17:31:50,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:31:50,059 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-21 17:31:50,060 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-21 17:31:50,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-21 17:31:50,060 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-21 17:31:50,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:50,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:50,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:50,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:31:50,061 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 17:31:50,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1615943924, now seen corresponding path program 1 times [2024-06-21 17:31:50,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:50,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525375504] [2024-06-21 17:31:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:50,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:50,523 INFO 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 17:31:50,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:50,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525375504] [2024-06-21 17:31:50,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525375504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:50,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:50,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:31:50,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982944487] [2024-06-21 17:31:50,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:50,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:31:50,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:31:50,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:31:50,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:31:50,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:50,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:50,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:31:50,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:50,841 INFO L124 PetriNetUnfolderBase]: 1163/1784 cut-off events. [2024-06-21 17:31:50,841 INFO L125 PetriNetUnfolderBase]: For 1189/1206 co-relation queries the response was YES. [2024-06-21 17:31:50,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4881 conditions, 1784 events. 1163/1784 cut-off events. For 1189/1206 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8538 event pairs, 690 based on Foata normal form. 8/1790 useless extension candidates. Maximal degree in co-relation 4865. Up to 1738 conditions per place. [2024-06-21 17:31:50,851 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-21 17:31:50,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 316 flow [2024-06-21 17:31:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:31:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:31:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-21 17:31:50,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 17:31:50,852 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 5 states and 100 transitions. [2024-06-21 17:31:50,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 316 flow [2024-06-21 17:31:50,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 312 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 17:31:50,855 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 212 flow [2024-06-21 17:31:50,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-06-21 17:31:50,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 17:31:50,855 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 212 flow [2024-06-21 17:31:50,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:50,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:50,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:50,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:31:50,856 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 17:31:50,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash 580485505, now seen corresponding path program 1 times [2024-06-21 17:31:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:50,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62451556] [2024-06-21 17:31:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:51,605 INFO 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 17:31:51,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:51,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62451556] [2024-06-21 17:31:51,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62451556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:51,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:51,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:31:51,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502963605] [2024-06-21 17:31:51,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:51,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:31:51,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:31:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:31:51,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-21 17:31:51,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:51,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:51,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-21 17:31:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:52,029 INFO L124 PetriNetUnfolderBase]: 1203/1852 cut-off events. [2024-06-21 17:31:52,029 INFO L125 PetriNetUnfolderBase]: For 2090/2112 co-relation queries the response was YES. [2024-06-21 17:31:52,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5503 conditions, 1852 events. 1203/1852 cut-off events. For 2090/2112 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8977 event pairs, 389 based on Foata normal form. 25/1875 useless extension candidates. Maximal degree in co-relation 5484. Up to 1638 conditions per place. [2024-06-21 17:31:52,038 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-21 17:31:52,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 490 flow [2024-06-21 17:31:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:52,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 17:31:52,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-21 17:31:52,039 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 212 flow. Second operand 6 states and 155 transitions. [2024-06-21 17:31:52,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 490 flow [2024-06-21 17:31:52,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 86 transitions, 470 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:52,042 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 272 flow [2024-06-21 17:31:52,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-21 17:31:52,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-21 17:31:52,043 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 272 flow [2024-06-21 17:31:52,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:52,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:52,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:52,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:31:52,043 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 17:31:52,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1445347293, now seen corresponding path program 1 times [2024-06-21 17:31:52,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:52,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473551770] [2024-06-21 17:31:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:52,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:52,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473551770] [2024-06-21 17:31:52,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473551770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:52,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:52,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:31:52,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052520018] [2024-06-21 17:31:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:52,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:31:52,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:52,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:31:52,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:31:52,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:31:52,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 272 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 17:31:52,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:52,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:31:52,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:52,941 INFO L124 PetriNetUnfolderBase]: 1388/2114 cut-off events. [2024-06-21 17:31:52,941 INFO L125 PetriNetUnfolderBase]: For 3550/3550 co-relation queries the response was YES. [2024-06-21 17:31:52,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6839 conditions, 2114 events. 1388/2114 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10313 event pairs, 597 based on Foata normal form. 2/2114 useless extension candidates. Maximal degree in co-relation 6818. Up to 2060 conditions per place. [2024-06-21 17:31:52,952 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 17:31:52,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 75 transitions, 496 flow [2024-06-21 17:31:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 17:31:52,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 17:31:52,954 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 272 flow. Second operand 6 states and 112 transitions. [2024-06-21 17:31:52,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 75 transitions, 496 flow [2024-06-21 17:31:52,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 456 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:52,958 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 330 flow [2024-06-21 17:31:52,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-21 17:31:52,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-21 17:31:52,959 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 330 flow [2024-06-21 17:31:52,959 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 17:31:52,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:52,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:52,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:31:52,959 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 17:31:52,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash -587341517, now seen corresponding path program 1 times [2024-06-21 17:31:52,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:52,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458030595] [2024-06-21 17:31:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:53,445 INFO 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 17:31:53,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:53,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458030595] [2024-06-21 17:31:53,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458030595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:53,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:53,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:31:53,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646117651] [2024-06-21 17:31:53,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:53,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:31:53,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:31:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:31:53,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:31:53,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 330 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:53,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:53,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:31:53,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:53,848 INFO L124 PetriNetUnfolderBase]: 1372/2114 cut-off events. [2024-06-21 17:31:53,848 INFO L125 PetriNetUnfolderBase]: For 4992/5024 co-relation queries the response was YES. [2024-06-21 17:31:53,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7275 conditions, 2114 events. 1372/2114 cut-off events. For 4992/5024 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10452 event pairs, 515 based on Foata normal form. 20/2126 useless extension candidates. Maximal degree in co-relation 7250. Up to 1986 conditions per place. [2024-06-21 17:31:53,861 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 65 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2024-06-21 17:31:53,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 92 transitions, 617 flow [2024-06-21 17:31:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 17:31:53,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-21 17:31:53,863 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 330 flow. Second operand 6 states and 127 transitions. [2024-06-21 17:31:53,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 92 transitions, 617 flow [2024-06-21 17:31:53,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 609 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 17:31:53,867 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 463 flow [2024-06-21 17:31:53,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-21 17:31:53,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-21 17:31:53,868 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 463 flow [2024-06-21 17:31:53,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:53,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:53,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:53,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:31:53,869 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 17:31:53,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:53,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1856085611, now seen corresponding path program 2 times [2024-06-21 17:31:53,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:53,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838806921] [2024-06-21 17:31:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:53,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:54,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:54,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838806921] [2024-06-21 17:31:54,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838806921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:54,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:54,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:31:54,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795555800] [2024-06-21 17:31:54,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:54,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:31:54,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:31:54,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:31:54,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:31:54,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 463 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:54,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:54,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:31:54,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:54,825 INFO L124 PetriNetUnfolderBase]: 1462/2257 cut-off events. [2024-06-21 17:31:54,825 INFO L125 PetriNetUnfolderBase]: For 7367/7394 co-relation queries the response was YES. [2024-06-21 17:31:54,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8981 conditions, 2257 events. 1462/2257 cut-off events. For 7367/7394 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11383 event pairs, 520 based on Foata normal form. 17/2263 useless extension candidates. Maximal degree in co-relation 8951. Up to 2014 conditions per place. [2024-06-21 17:31:54,840 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 66 selfloop transitions, 25 changer transitions 0/100 dead transitions. [2024-06-21 17:31:54,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 793 flow [2024-06-21 17:31:54,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 17:31:54,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-21 17:31:54,841 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 463 flow. Second operand 6 states and 128 transitions. [2024-06-21 17:31:54,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 793 flow [2024-06-21 17:31:54,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 763 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 17:31:54,848 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 578 flow [2024-06-21 17:31:54,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=578, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-21 17:31:54,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-21 17:31:54,849 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 578 flow [2024-06-21 17:31:54,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:54,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:54,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:54,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:31:54,850 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 17:31:54,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:54,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1856094539, now seen corresponding path program 1 times [2024-06-21 17:31:54,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:54,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201283287] [2024-06-21 17:31:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:54,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:55,628 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 17:31:55,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201283287] [2024-06-21 17:31:55,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201283287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:55,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:55,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646628916] [2024-06-21 17:31:55,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:55,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:55,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:31:55,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 578 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 17:31:55,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:55,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:31:55,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:56,044 INFO L124 PetriNetUnfolderBase]: 1511/2311 cut-off events. [2024-06-21 17:31:56,045 INFO L125 PetriNetUnfolderBase]: For 9551/9551 co-relation queries the response was YES. [2024-06-21 17:31:56,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9793 conditions, 2311 events. 1511/2311 cut-off events. For 9551/9551 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11451 event pairs, 578 based on Foata normal form. 2/2311 useless extension candidates. Maximal degree in co-relation 9760. Up to 2226 conditions per place. [2024-06-21 17:31:56,058 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2024-06-21 17:31:56,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 836 flow [2024-06-21 17:31:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:31:56,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 17:31:56,061 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 578 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:31:56,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 836 flow [2024-06-21 17:31:56,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 797 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 17:31:56,095 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 599 flow [2024-06-21 17:31:56,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-21 17:31:56,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-21 17:31:56,096 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 599 flow [2024-06-21 17:31:56,096 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 17:31:56,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:56,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:56,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:31:56,097 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 17:31:56,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:56,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1027716458, now seen corresponding path program 1 times [2024-06-21 17:31:56,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:56,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991948890] [2024-06-21 17:31:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:56,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:56,617 INFO 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 17:31:56,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:56,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991948890] [2024-06-21 17:31:56,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991948890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:56,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:56,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:56,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747730286] [2024-06-21 17:31:56,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:56,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:56,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:56,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:56,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:56,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:31:56,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 599 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 17:31:56,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:56,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:31:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:57,075 INFO L124 PetriNetUnfolderBase]: 1533/2348 cut-off events. [2024-06-21 17:31:57,076 INFO L125 PetriNetUnfolderBase]: For 10841/10841 co-relation queries the response was YES. [2024-06-21 17:31:57,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10303 conditions, 2348 events. 1533/2348 cut-off events. For 10841/10841 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11537 event pairs, 546 based on Foata normal form. 4/2350 useless extension candidates. Maximal degree in co-relation 10268. Up to 2229 conditions per place. [2024-06-21 17:31:57,089 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 96 selfloop transitions, 14 changer transitions 0/115 dead transitions. [2024-06-21 17:31:57,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 115 transitions, 951 flow [2024-06-21 17:31:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 17:31:57,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-21 17:31:57,093 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 599 flow. Second operand 7 states and 134 transitions. [2024-06-21 17:31:57,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 115 transitions, 951 flow [2024-06-21 17:31:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 115 transitions, 915 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:57,101 INFO L231 Difference]: Finished difference. Result has 80 places, 91 transitions, 685 flow [2024-06-21 17:31:57,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=80, PETRI_TRANSITIONS=91} [2024-06-21 17:31:57,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-21 17:31:57,102 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 91 transitions, 685 flow [2024-06-21 17:31:57,102 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 17:31:57,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:57,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:57,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:31:57,103 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 17:31:57,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:57,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1704347388, now seen corresponding path program 2 times [2024-06-21 17:31:57,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191068192] [2024-06-21 17:31:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:57,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:57,730 INFO 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 17:31:57,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191068192] [2024-06-21 17:31:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191068192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:57,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:57,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523123637] [2024-06-21 17:31:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:57,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:57,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:31:57,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 91 transitions, 685 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 17:31:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:57,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:31:57,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:58,188 INFO L124 PetriNetUnfolderBase]: 1571/2403 cut-off events. [2024-06-21 17:31:58,188 INFO L125 PetriNetUnfolderBase]: For 13456/13456 co-relation queries the response was YES. [2024-06-21 17:31:58,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11122 conditions, 2403 events. 1571/2403 cut-off events. For 13456/13456 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11884 event pairs, 551 based on Foata normal form. 4/2403 useless extension candidates. Maximal degree in co-relation 11084. Up to 2201 conditions per place. [2024-06-21 17:31:58,203 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 27 changer transitions 0/124 dead transitions. [2024-06-21 17:31:58,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 124 transitions, 1095 flow [2024-06-21 17:31:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 17:31:58,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-21 17:31:58,205 INFO L175 Difference]: Start difference. First operand has 80 places, 91 transitions, 685 flow. Second operand 7 states and 137 transitions. [2024-06-21 17:31:58,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 124 transitions, 1095 flow [2024-06-21 17:31:58,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 1069 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 17:31:58,215 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 807 flow [2024-06-21 17:31:58,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=807, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-21 17:31:58,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 17:31:58,218 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 807 flow [2024-06-21 17:31:58,218 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 17:31:58,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:58,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:58,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:31:58,219 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 17:31:58,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:58,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1704080478, now seen corresponding path program 3 times [2024-06-21 17:31:58,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:58,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066776178] [2024-06-21 17:31:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:58,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:58,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:58,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066776178] [2024-06-21 17:31:58,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066776178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:58,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:58,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:58,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088898315] [2024-06-21 17:31:58,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:58,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:58,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:58,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:31:58,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 807 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 17:31:58,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:58,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:31:58,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:59,212 INFO L124 PetriNetUnfolderBase]: 1561/2389 cut-off events. [2024-06-21 17:31:59,212 INFO L125 PetriNetUnfolderBase]: For 16021/16021 co-relation queries the response was YES. [2024-06-21 17:31:59,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11685 conditions, 2389 events. 1561/2389 cut-off events. For 16021/16021 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11847 event pairs, 556 based on Foata normal form. 4/2389 useless extension candidates. Maximal degree in co-relation 11644. Up to 2193 conditions per place. [2024-06-21 17:31:59,227 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 91 selfloop transitions, 26 changer transitions 0/122 dead transitions. [2024-06-21 17:31:59,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 1107 flow [2024-06-21 17:31:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 17:31:59,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 17:31:59,229 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 807 flow. Second operand 7 states and 136 transitions. [2024-06-21 17:31:59,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 1107 flow [2024-06-21 17:31:59,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 122 transitions, 1067 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 17:31:59,242 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 827 flow [2024-06-21 17:31:59,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=827, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-21 17:31:59,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-21 17:31:59,243 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 827 flow [2024-06-21 17:31:59,243 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 17:31:59,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:59,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:59,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:31:59,244 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 17:31:59,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1704357308, now seen corresponding path program 1 times [2024-06-21 17:31:59,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:59,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118789049] [2024-06-21 17:31:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:59,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:00,110 INFO 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 17:32:00,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:00,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118789049] [2024-06-21 17:32:00,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118789049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:00,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:00,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:00,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518667839] [2024-06-21 17:32:00,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:00,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:00,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:00,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:00,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:00,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:00,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 827 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 17:32:00,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:00,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:00,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:00,610 INFO L124 PetriNetUnfolderBase]: 1553/2382 cut-off events. [2024-06-21 17:32:00,611 INFO L125 PetriNetUnfolderBase]: For 17241/17241 co-relation queries the response was YES. [2024-06-21 17:32:00,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11721 conditions, 2382 events. 1553/2382 cut-off events. For 17241/17241 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11739 event pairs, 545 based on Foata normal form. 4/2384 useless extension candidates. Maximal degree in co-relation 11678. Up to 2269 conditions per place. [2024-06-21 17:32:00,625 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 105 selfloop transitions, 16 changer transitions 0/126 dead transitions. [2024-06-21 17:32:00,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 126 transitions, 1149 flow [2024-06-21 17:32:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:32:00,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 17:32:00,627 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 827 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:32:00,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 126 transitions, 1149 flow [2024-06-21 17:32:00,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 126 transitions, 1065 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:00,640 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 806 flow [2024-06-21 17:32:00,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=806, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-21 17:32:00,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 17:32:00,642 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 806 flow [2024-06-21 17:32:00,642 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 17:32:00,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:00,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:00,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:32:00,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:00,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:00,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1028916310, now seen corresponding path program 1 times [2024-06-21 17:32:00,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295530016] [2024-06-21 17:32:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:01,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:01,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295530016] [2024-06-21 17:32:01,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295530016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:01,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:01,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:32:01,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285534248] [2024-06-21 17:32:01,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:32:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:32:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:32:01,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:32:01,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 806 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:01,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:01,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:32:01,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:02,016 INFO L124 PetriNetUnfolderBase]: 1509/2336 cut-off events. [2024-06-21 17:32:02,017 INFO L125 PetriNetUnfolderBase]: For 21133/21176 co-relation queries the response was YES. [2024-06-21 17:32:02,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 2336 events. 1509/2336 cut-off events. For 21133/21176 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11866 event pairs, 493 based on Foata normal form. 23/2315 useless extension candidates. Maximal degree in co-relation 11768. Up to 2091 conditions per place. [2024-06-21 17:32:02,032 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 91 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2024-06-21 17:32:02,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 136 transitions, 1200 flow [2024-06-21 17:32:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 17:32:02,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-21 17:32:02,034 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 806 flow. Second operand 7 states and 152 transitions. [2024-06-21 17:32:02,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 136 transitions, 1200 flow [2024-06-21 17:32:02,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 136 transitions, 1155 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:02,045 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 876 flow [2024-06-21 17:32:02,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-06-21 17:32:02,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-21 17:32:02,046 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 876 flow [2024-06-21 17:32:02,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:02,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:02,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:02,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:32:02,047 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 17:32:02,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1033684854, now seen corresponding path program 1 times [2024-06-21 17:32:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:02,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549080569] [2024-06-21 17:32:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:02,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:02,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549080569] [2024-06-21 17:32:02,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549080569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:02,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:02,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:02,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332131246] [2024-06-21 17:32:02,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:02,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:02,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:02,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:02,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:02,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:02,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 876 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 17:32:02,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:02,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:02,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:03,377 INFO L124 PetriNetUnfolderBase]: 1581/2423 cut-off events. [2024-06-21 17:32:03,378 INFO L125 PetriNetUnfolderBase]: For 22533/22533 co-relation queries the response was YES. [2024-06-21 17:32:03,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12591 conditions, 2423 events. 1581/2423 cut-off events. For 22533/22533 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12004 event pairs, 515 based on Foata normal form. 4/2425 useless extension candidates. Maximal degree in co-relation 12548. Up to 2281 conditions per place. [2024-06-21 17:32:03,395 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 115 selfloop transitions, 18 changer transitions 0/138 dead transitions. [2024-06-21 17:32:03,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 138 transitions, 1252 flow [2024-06-21 17:32:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:32:03,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:32:03,397 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 876 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:32:03,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 138 transitions, 1252 flow [2024-06-21 17:32:03,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1169 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:03,414 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 878 flow [2024-06-21 17:32:03,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=878, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-21 17:32:03,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 17:32:03,415 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 878 flow [2024-06-21 17:32:03,416 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 17:32:03,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:03,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:03,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:32:03,416 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 17:32:03,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:03,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1149993098, now seen corresponding path program 2 times [2024-06-21 17:32:03,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:03,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089312761] [2024-06-21 17:32:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:03,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:04,210 INFO 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 17:32:04,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089312761] [2024-06-21 17:32:04,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089312761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:04,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:04,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489107476] [2024-06-21 17:32:04,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:04,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:04,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:04,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:04,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:04,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 878 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 17:32:04,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:04,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:04,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:04,713 INFO L124 PetriNetUnfolderBase]: 1592/2449 cut-off events. [2024-06-21 17:32:04,713 INFO L125 PetriNetUnfolderBase]: For 25458/25458 co-relation queries the response was YES. [2024-06-21 17:32:04,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13131 conditions, 2449 events. 1592/2449 cut-off events. For 25458/25458 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12190 event pairs, 515 based on Foata normal form. 2/2447 useless extension candidates. Maximal degree in co-relation 13087. Up to 2284 conditions per place. [2024-06-21 17:32:04,731 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 27 changer transitions 0/149 dead transitions. [2024-06-21 17:32:04,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 149 transitions, 1349 flow [2024-06-21 17:32:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:32:04,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 17:32:04,733 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 878 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:32:04,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 149 transitions, 1349 flow [2024-06-21 17:32:04,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1287 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:04,747 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 1036 flow [2024-06-21 17:32:04,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1036, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-06-21 17:32:04,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-21 17:32:04,748 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 1036 flow [2024-06-21 17:32:04,748 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 17:32:04,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:04,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:04,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:32:04,748 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 17:32:04,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1141422218, now seen corresponding path program 3 times [2024-06-21 17:32:04,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:04,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817494911] [2024-06-21 17:32:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:04,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:05,506 INFO 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 17:32:05,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:05,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817494911] [2024-06-21 17:32:05,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817494911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:05,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:05,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:05,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220990994] [2024-06-21 17:32:05,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:05,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:05,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:05,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:05,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:05,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 1036 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 17:32:05,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:05,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:05,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:06,125 INFO L124 PetriNetUnfolderBase]: 1603/2465 cut-off events. [2024-06-21 17:32:06,126 INFO L125 PetriNetUnfolderBase]: For 28955/28955 co-relation queries the response was YES. [2024-06-21 17:32:06,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13757 conditions, 2465 events. 1603/2465 cut-off events. For 28955/28955 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12292 event pairs, 515 based on Foata normal form. 2/2463 useless extension candidates. Maximal degree in co-relation 13709. Up to 2262 conditions per place. [2024-06-21 17:32:06,140 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 115 selfloop transitions, 41 changer transitions 0/161 dead transitions. [2024-06-21 17:32:06,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 1573 flow [2024-06-21 17:32:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:32:06,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:32:06,142 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 1036 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:32:06,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 1573 flow [2024-06-21 17:32:06,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1517 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 17:32:06,158 INFO L231 Difference]: Finished difference. Result has 109 places, 136 transitions, 1211 flow [2024-06-21 17:32:06,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1211, PETRI_PLACES=109, PETRI_TRANSITIONS=136} [2024-06-21 17:32:06,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-21 17:32:06,159 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 136 transitions, 1211 flow [2024-06-21 17:32:06,159 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 17:32:06,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:06,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:06,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:32:06,160 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 17:32:06,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:06,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1295162892, now seen corresponding path program 4 times [2024-06-21 17:32:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:06,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610967249] [2024-06-21 17:32:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:06,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:06,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:06,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610967249] [2024-06-21 17:32:06,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610967249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:06,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:06,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:06,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160965909] [2024-06-21 17:32:06,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:06,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:06,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:06,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:06,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:06,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:06,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 136 transitions, 1211 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 17:32:06,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:06,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:06,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:07,352 INFO L124 PetriNetUnfolderBase]: 1598/2453 cut-off events. [2024-06-21 17:32:07,353 INFO L125 PetriNetUnfolderBase]: For 32277/32277 co-relation queries the response was YES. [2024-06-21 17:32:07,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14288 conditions, 2453 events. 1598/2453 cut-off events. For 32277/32277 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12193 event pairs, 515 based on Foata normal form. 2/2451 useless extension candidates. Maximal degree in co-relation 14236. Up to 2293 conditions per place. [2024-06-21 17:32:07,397 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 30 changer transitions 0/159 dead transitions. [2024-06-21 17:32:07,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 159 transitions, 1577 flow [2024-06-21 17:32:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:32:07,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:32:07,399 INFO L175 Difference]: Start difference. First operand has 109 places, 136 transitions, 1211 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:32:07,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 159 transitions, 1577 flow [2024-06-21 17:32:07,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 159 transitions, 1535 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 17:32:07,424 INFO L231 Difference]: Finished difference. Result has 115 places, 136 transitions, 1237 flow [2024-06-21 17:32:07,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1237, PETRI_PLACES=115, PETRI_TRANSITIONS=136} [2024-06-21 17:32:07,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-21 17:32:07,425 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 136 transitions, 1237 flow [2024-06-21 17:32:07,425 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 17:32:07,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:07,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:07,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:32:07,426 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:07,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1872151641, now seen corresponding path program 1 times [2024-06-21 17:32:07,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:07,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699040275] [2024-06-21 17:32:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:07,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:07,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:07,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699040275] [2024-06-21 17:32:07,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699040275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:07,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:07,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:32:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288129411] [2024-06-21 17:32:07,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:07,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:32:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:07,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:32:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:32:07,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:07,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 136 transitions, 1237 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 17:32:07,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:07,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:07,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:08,280 INFO L124 PetriNetUnfolderBase]: 1547/2375 cut-off events. [2024-06-21 17:32:08,280 INFO L125 PetriNetUnfolderBase]: For 33095/33095 co-relation queries the response was YES. [2024-06-21 17:32:08,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13968 conditions, 2375 events. 1547/2375 cut-off events. For 33095/33095 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11843 event pairs, 463 based on Foata normal form. 6/2375 useless extension candidates. Maximal degree in co-relation 13914. Up to 2222 conditions per place. [2024-06-21 17:32:08,296 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 123 selfloop transitions, 20 changer transitions 0/148 dead transitions. [2024-06-21 17:32:08,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 148 transitions, 1579 flow [2024-06-21 17:32:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:32:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:32:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-21 17:32:08,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-21 17:32:08,297 INFO L175 Difference]: Start difference. First operand has 115 places, 136 transitions, 1237 flow. Second operand 5 states and 99 transitions. [2024-06-21 17:32:08,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 148 transitions, 1579 flow [2024-06-21 17:32:08,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 1487 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:08,318 INFO L231 Difference]: Finished difference. Result has 114 places, 136 transitions, 1196 flow [2024-06-21 17:32:08,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1196, PETRI_PLACES=114, PETRI_TRANSITIONS=136} [2024-06-21 17:32:08,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 17:32:08,320 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 136 transitions, 1196 flow [2024-06-21 17:32:08,320 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 17:32:08,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:08,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:08,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:32:08,320 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:08,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash 253419743, now seen corresponding path program 1 times [2024-06-21 17:32:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:08,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011287887] [2024-06-21 17:32:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:09,101 INFO 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 17:32:09,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011287887] [2024-06-21 17:32:09,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011287887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:09,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:09,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:09,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030881680] [2024-06-21 17:32:09,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:09,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:09,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:09,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 136 transitions, 1196 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 17:32:09,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:09,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:09,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:09,658 INFO L124 PetriNetUnfolderBase]: 1592/2448 cut-off events. [2024-06-21 17:32:09,658 INFO L125 PetriNetUnfolderBase]: For 34820/34820 co-relation queries the response was YES. [2024-06-21 17:32:09,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14378 conditions, 2448 events. 1592/2448 cut-off events. For 34820/34820 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12089 event pairs, 490 based on Foata normal form. 4/2450 useless extension candidates. Maximal degree in co-relation 14324. Up to 2307 conditions per place. [2024-06-21 17:32:09,675 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 156 selfloop transitions, 22 changer transitions 0/183 dead transitions. [2024-06-21 17:32:09,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 183 transitions, 1776 flow [2024-06-21 17:32:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:32:09,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:32:09,677 INFO L175 Difference]: Start difference. First operand has 114 places, 136 transitions, 1196 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:32:09,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 183 transitions, 1776 flow [2024-06-21 17:32:09,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 183 transitions, 1716 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:09,700 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1348 flow [2024-06-21 17:32:09,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1348, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2024-06-21 17:32:09,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-21 17:32:09,701 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1348 flow [2024-06-21 17:32:09,701 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 17:32:09,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:09,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:09,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:32:09,702 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 17:32:09,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1973738993, now seen corresponding path program 2 times [2024-06-21 17:32:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:09,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938894933] [2024-06-21 17:32:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:09,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:10,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:10,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938894933] [2024-06-21 17:32:10,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938894933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:10,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:10,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:10,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240685763] [2024-06-21 17:32:10,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:10,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:10,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:10,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:10,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1348 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 17:32:10,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:10,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:10,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:11,056 INFO L124 PetriNetUnfolderBase]: 1587/2442 cut-off events. [2024-06-21 17:32:11,057 INFO L125 PetriNetUnfolderBase]: For 38241/38241 co-relation queries the response was YES. [2024-06-21 17:32:11,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14851 conditions, 2442 events. 1587/2442 cut-off events. For 38241/38241 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12072 event pairs, 470 based on Foata normal form. 2/2442 useless extension candidates. Maximal degree in co-relation 14795. Up to 2291 conditions per place. [2024-06-21 17:32:11,074 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 25 changer transitions 0/186 dead transitions. [2024-06-21 17:32:11,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 186 transitions, 1904 flow [2024-06-21 17:32:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:32:11,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:32:11,077 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1348 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:32:11,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 186 transitions, 1904 flow [2024-06-21 17:32:11,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 186 transitions, 1808 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:11,107 INFO L231 Difference]: Finished difference. Result has 127 places, 158 transitions, 1443 flow [2024-06-21 17:32:11,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=127, PETRI_TRANSITIONS=158} [2024-06-21 17:32:11,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 17:32:11,108 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 158 transitions, 1443 flow [2024-06-21 17:32:11,109 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 17:32:11,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:11,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:11,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:32:11,110 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 17:32:11,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:11,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1531123429, now seen corresponding path program 1 times [2024-06-21 17:32:11,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:11,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667581477] [2024-06-21 17:32:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:11,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:11,991 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 17:32:11,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667581477] [2024-06-21 17:32:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667581477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:11,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:11,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:11,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495371861] [2024-06-21 17:32:11,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:11,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:11,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:11,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:12,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:12,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 158 transitions, 1443 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 17:32:12,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:12,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:12,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:12,691 INFO L124 PetriNetUnfolderBase]: 1604/2468 cut-off events. [2024-06-21 17:32:12,691 INFO L125 PetriNetUnfolderBase]: For 42654/42654 co-relation queries the response was YES. [2024-06-21 17:32:12,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15430 conditions, 2468 events. 1604/2468 cut-off events. For 42654/42654 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12214 event pairs, 475 based on Foata normal form. 4/2470 useless extension candidates. Maximal degree in co-relation 15371. Up to 2329 conditions per place. [2024-06-21 17:32:12,709 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 167 selfloop transitions, 19 changer transitions 0/191 dead transitions. [2024-06-21 17:32:12,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 1937 flow [2024-06-21 17:32:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:32:12,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 17:32:12,711 INFO L175 Difference]: Start difference. First operand has 127 places, 158 transitions, 1443 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:32:12,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 1937 flow [2024-06-21 17:32:12,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 191 transitions, 1864 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:12,739 INFO L231 Difference]: Finished difference. Result has 132 places, 160 transitions, 1447 flow [2024-06-21 17:32:12,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1447, PETRI_PLACES=132, PETRI_TRANSITIONS=160} [2024-06-21 17:32:12,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 17:32:12,740 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 160 transitions, 1447 flow [2024-06-21 17:32:12,740 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 17:32:12,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:12,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:12,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:32:12,741 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 17:32:12,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:12,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1238844925, now seen corresponding path program 2 times [2024-06-21 17:32:12,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:12,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871126541] [2024-06-21 17:32:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:12,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:13,596 INFO 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 17:32:13,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871126541] [2024-06-21 17:32:13,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871126541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:13,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:13,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:13,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250312860] [2024-06-21 17:32:13,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:13,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:13,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:13,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:13,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 160 transitions, 1447 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 17:32:13,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:13,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:13,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:14,202 INFO L124 PetriNetUnfolderBase]: 1621/2501 cut-off events. [2024-06-21 17:32:14,202 INFO L125 PetriNetUnfolderBase]: For 46641/46641 co-relation queries the response was YES. [2024-06-21 17:32:14,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15874 conditions, 2501 events. 1621/2501 cut-off events. For 46641/46641 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12442 event pairs, 489 based on Foata normal form. 4/2501 useless extension candidates. Maximal degree in co-relation 15813. Up to 2311 conditions per place. [2024-06-21 17:32:14,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2024-06-21 17:32:14,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 190 transitions, 1933 flow [2024-06-21 17:32:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:32:14,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 17:32:14,221 INFO L175 Difference]: Start difference. First operand has 132 places, 160 transitions, 1447 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:32:14,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 190 transitions, 1933 flow [2024-06-21 17:32:14,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 190 transitions, 1838 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:14,245 INFO L231 Difference]: Finished difference. Result has 134 places, 162 transitions, 1457 flow [2024-06-21 17:32:14,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1457, PETRI_PLACES=134, PETRI_TRANSITIONS=162} [2024-06-21 17:32:14,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 17:32:14,246 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 162 transitions, 1457 flow [2024-06-21 17:32:14,246 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 17:32:14,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:14,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:14,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:32:14,246 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:14,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:14,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1504868635, now seen corresponding path program 3 times [2024-06-21 17:32:14,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:14,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108094340] [2024-06-21 17:32:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:14,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:15,073 INFO 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 17:32:15,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:15,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108094340] [2024-06-21 17:32:15,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108094340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:15,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:15,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:15,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009613589] [2024-06-21 17:32:15,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:15,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:15,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:15,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:15,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 162 transitions, 1457 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 17:32:15,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:15,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:15,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:15,723 INFO L124 PetriNetUnfolderBase]: 1638/2530 cut-off events. [2024-06-21 17:32:15,723 INFO L125 PetriNetUnfolderBase]: For 51031/51031 co-relation queries the response was YES. [2024-06-21 17:32:15,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16308 conditions, 2530 events. 1638/2530 cut-off events. For 51031/51031 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12656 event pairs, 454 based on Foata normal form. 4/2530 useless extension candidates. Maximal degree in co-relation 16246. Up to 2214 conditions per place. [2024-06-21 17:32:15,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 142 selfloop transitions, 50 changer transitions 0/197 dead transitions. [2024-06-21 17:32:15,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 197 transitions, 2089 flow [2024-06-21 17:32:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:32:15,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 17:32:15,744 INFO L175 Difference]: Start difference. First operand has 134 places, 162 transitions, 1457 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:32:15,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 197 transitions, 2089 flow [2024-06-21 17:32:15,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 197 transitions, 2002 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:15,778 INFO L231 Difference]: Finished difference. Result has 136 places, 166 transitions, 1553 flow [2024-06-21 17:32:15,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1553, PETRI_PLACES=136, PETRI_TRANSITIONS=166} [2024-06-21 17:32:15,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-21 17:32:15,779 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 166 transitions, 1553 flow [2024-06-21 17:32:15,779 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 17:32:15,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:15,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:15,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:32:15,779 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 17:32:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1495604905, now seen corresponding path program 4 times [2024-06-21 17:32:15,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:15,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494081567] [2024-06-21 17:32:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:15,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:16,617 INFO 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 17:32:16,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:16,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494081567] [2024-06-21 17:32:16,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494081567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:16,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:16,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:16,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737433493] [2024-06-21 17:32:16,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:16,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:16,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:16,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:16,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:16,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:16,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 166 transitions, 1553 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 17:32:16,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:16,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:16,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:17,185 INFO L124 PetriNetUnfolderBase]: 1655/2557 cut-off events. [2024-06-21 17:32:17,186 INFO L125 PetriNetUnfolderBase]: For 55922/55922 co-relation queries the response was YES. [2024-06-21 17:32:17,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16831 conditions, 2557 events. 1655/2557 cut-off events. For 55922/55922 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12776 event pairs, 489 based on Foata normal form. 4/2557 useless extension candidates. Maximal degree in co-relation 16768. Up to 2329 conditions per place. [2024-06-21 17:32:17,206 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 148 selfloop transitions, 43 changer transitions 0/196 dead transitions. [2024-06-21 17:32:17,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 196 transitions, 2059 flow [2024-06-21 17:32:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:32:17,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 17:32:17,208 INFO L175 Difference]: Start difference. First operand has 136 places, 166 transitions, 1553 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:32:17,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 196 transitions, 2059 flow [2024-06-21 17:32:17,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 196 transitions, 1949 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:17,249 INFO L231 Difference]: Finished difference. Result has 140 places, 168 transitions, 1580 flow [2024-06-21 17:32:17,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1580, PETRI_PLACES=140, PETRI_TRANSITIONS=168} [2024-06-21 17:32:17,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 17:32:17,250 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 168 transitions, 1580 flow [2024-06-21 17:32:17,250 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 17:32:17,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:17,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:17,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:32:17,251 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 17:32:17,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash -591709097, now seen corresponding path program 5 times [2024-06-21 17:32:17,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:17,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723330994] [2024-06-21 17:32:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:18,148 INFO 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 17:32:18,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723330994] [2024-06-21 17:32:18,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723330994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:18,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:18,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:18,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062194880] [2024-06-21 17:32:18,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:18,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:18,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:18,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:18,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:18,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:18,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 168 transitions, 1580 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 17:32:18,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:18,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:18,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:18,787 INFO L124 PetriNetUnfolderBase]: 1733/2686 cut-off events. [2024-06-21 17:32:18,787 INFO L125 PetriNetUnfolderBase]: For 65063/65063 co-relation queries the response was YES. [2024-06-21 17:32:18,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17603 conditions, 2686 events. 1733/2686 cut-off events. For 65063/65063 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13636 event pairs, 497 based on Foata normal form. 26/2708 useless extension candidates. Maximal degree in co-relation 17538. Up to 2310 conditions per place. [2024-06-21 17:32:18,809 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 153 selfloop transitions, 46 changer transitions 0/204 dead transitions. [2024-06-21 17:32:18,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 204 transitions, 2186 flow [2024-06-21 17:32:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 17:32:18,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-21 17:32:18,810 INFO L175 Difference]: Start difference. First operand has 140 places, 168 transitions, 1580 flow. Second operand 9 states and 176 transitions. [2024-06-21 17:32:18,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 204 transitions, 2186 flow [2024-06-21 17:32:18,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 204 transitions, 2077 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:18,856 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 1672 flow [2024-06-21 17:32:18,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1672, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2024-06-21 17:32:18,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 17:32:18,857 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 1672 flow [2024-06-21 17:32:18,857 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 17:32:18,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:18,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:18,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:32:18,857 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 17:32:18,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1554388555, now seen corresponding path program 1 times [2024-06-21 17:32:18,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:18,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116660787] [2024-06-21 17:32:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:18,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:19,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116660787] [2024-06-21 17:32:19,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116660787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:19,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:19,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:19,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105582369] [2024-06-21 17:32:19,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:19,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:19,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:19,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:19,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:19,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:32:19,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 1672 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:19,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:19,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:32:19,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:20,086 INFO L124 PetriNetUnfolderBase]: 1758/2770 cut-off events. [2024-06-21 17:32:20,087 INFO L125 PetriNetUnfolderBase]: For 74697/74753 co-relation queries the response was YES. [2024-06-21 17:32:20,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18695 conditions, 2770 events. 1758/2770 cut-off events. For 74697/74753 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14538 event pairs, 457 based on Foata normal form. 10/2741 useless extension candidates. Maximal degree in co-relation 18628. Up to 2452 conditions per place. [2024-06-21 17:32:20,110 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 148 selfloop transitions, 37 changer transitions 0/226 dead transitions. [2024-06-21 17:32:20,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 226 transitions, 2356 flow [2024-06-21 17:32:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 17:32:20,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-21 17:32:20,112 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 1672 flow. Second operand 9 states and 181 transitions. [2024-06-21 17:32:20,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 226 transitions, 2356 flow [2024-06-21 17:32:20,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 226 transitions, 2231 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:20,167 INFO L231 Difference]: Finished difference. Result has 150 places, 193 transitions, 1913 flow [2024-06-21 17:32:20,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1913, PETRI_PLACES=150, PETRI_TRANSITIONS=193} [2024-06-21 17:32:20,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-21 17:32:20,168 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 193 transitions, 1913 flow [2024-06-21 17:32:20,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:20,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:20,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:32:20,169 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:20,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:20,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1831792625, now seen corresponding path program 2 times [2024-06-21 17:32:20,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:20,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622965689] [2024-06-21 17:32:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:20,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:20,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622965689] [2024-06-21 17:32:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622965689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:20,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:20,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431397259] [2024-06-21 17:32:20,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:21,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:32:21,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 193 transitions, 1913 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:21,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:21,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:32:21,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:21,698 INFO L124 PetriNetUnfolderBase]: 1823/2875 cut-off events. [2024-06-21 17:32:21,698 INFO L125 PetriNetUnfolderBase]: For 78612/78675 co-relation queries the response was YES. [2024-06-21 17:32:21,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19571 conditions, 2875 events. 1823/2875 cut-off events. For 78612/78675 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15177 event pairs, 316 based on Foata normal form. 34/2868 useless extension candidates. Maximal degree in co-relation 19499. Up to 2347 conditions per place. [2024-06-21 17:32:21,720 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 144 selfloop transitions, 51 changer transitions 0/236 dead transitions. [2024-06-21 17:32:21,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 236 transitions, 2555 flow [2024-06-21 17:32:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 17:32:21,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-21 17:32:21,721 INFO L175 Difference]: Start difference. First operand has 150 places, 193 transitions, 1913 flow. Second operand 8 states and 175 transitions. [2024-06-21 17:32:21,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 236 transitions, 2555 flow [2024-06-21 17:32:21,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 236 transitions, 2487 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:21,768 INFO L231 Difference]: Finished difference. Result has 156 places, 197 transitions, 2023 flow [2024-06-21 17:32:21,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2023, PETRI_PLACES=156, PETRI_TRANSITIONS=197} [2024-06-21 17:32:21,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-21 17:32:21,769 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 197 transitions, 2023 flow [2024-06-21 17:32:21,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:21,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:21,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:21,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:32:21,770 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:21,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:21,770 INFO L85 PathProgramCache]: Analyzing trace with hash 946135221, now seen corresponding path program 3 times [2024-06-21 17:32:21,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:21,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810080048] [2024-06-21 17:32:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:22,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:22,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810080048] [2024-06-21 17:32:22,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810080048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:22,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:22,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:22,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807006191] [2024-06-21 17:32:22,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:22,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:22,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:22,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:22,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:22,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:32:22,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 197 transitions, 2023 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:22,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:22,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:32:22,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:23,236 INFO L124 PetriNetUnfolderBase]: 1881/2963 cut-off events. [2024-06-21 17:32:23,236 INFO L125 PetriNetUnfolderBase]: For 86270/86336 co-relation queries the response was YES. [2024-06-21 17:32:23,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20698 conditions, 2963 events. 1881/2963 cut-off events. For 86270/86336 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15759 event pairs, 450 based on Foata normal form. 25/2945 useless extension candidates. Maximal degree in co-relation 20623. Up to 2562 conditions per place. [2024-06-21 17:32:23,263 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 149 selfloop transitions, 51 changer transitions 0/241 dead transitions. [2024-06-21 17:32:23,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 241 transitions, 2692 flow [2024-06-21 17:32:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 17:32:23,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-21 17:32:23,265 INFO L175 Difference]: Start difference. First operand has 156 places, 197 transitions, 2023 flow. Second operand 8 states and 170 transitions. [2024-06-21 17:32:23,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 241 transitions, 2692 flow [2024-06-21 17:32:23,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 241 transitions, 2569 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:23,321 INFO L231 Difference]: Finished difference. Result has 162 places, 208 transitions, 2204 flow [2024-06-21 17:32:23,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2204, PETRI_PLACES=162, PETRI_TRANSITIONS=208} [2024-06-21 17:32:23,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 17:32:23,322 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 208 transitions, 2204 flow [2024-06-21 17:32:23,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:23,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:23,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:23,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:32:23,323 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:23,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:23,323 INFO L85 PathProgramCache]: Analyzing trace with hash 946140181, now seen corresponding path program 1 times [2024-06-21 17:32:23,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:23,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235589832] [2024-06-21 17:32:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:23,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:24,208 INFO 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 17:32:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235589832] [2024-06-21 17:32:24,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235589832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:24,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:24,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:24,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029038961] [2024-06-21 17:32:24,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:24,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:24,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:24,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:24,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 208 transitions, 2204 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 17:32:24,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:24,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:24,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:24,859 INFO L124 PetriNetUnfolderBase]: 1988/3105 cut-off events. [2024-06-21 17:32:24,859 INFO L125 PetriNetUnfolderBase]: For 78948/78948 co-relation queries the response was YES. [2024-06-21 17:32:24,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21753 conditions, 3105 events. 1988/3105 cut-off events. For 78948/78948 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16244 event pairs, 474 based on Foata normal form. 2/3105 useless extension candidates. Maximal degree in co-relation 21674. Up to 2877 conditions per place. [2024-06-21 17:32:24,881 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 200 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-21 17:32:24,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 242 transitions, 2848 flow [2024-06-21 17:32:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:32:24,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 17:32:24,883 INFO L175 Difference]: Start difference. First operand has 162 places, 208 transitions, 2204 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:32:24,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 242 transitions, 2848 flow [2024-06-21 17:32:24,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 242 transitions, 2767 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:24,943 INFO L231 Difference]: Finished difference. Result has 168 places, 211 transitions, 2276 flow [2024-06-21 17:32:24,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2276, PETRI_PLACES=168, PETRI_TRANSITIONS=211} [2024-06-21 17:32:24,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-21 17:32:24,944 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 211 transitions, 2276 flow [2024-06-21 17:32:24,944 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 17:32:24,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:24,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:24,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:32:24,944 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 17:32:24,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2115579889, now seen corresponding path program 4 times [2024-06-21 17:32:24,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:24,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041917278] [2024-06-21 17:32:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:24,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:25,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041917278] [2024-06-21 17:32:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041917278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:25,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128333217] [2024-06-21 17:32:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:25,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:32:25,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 211 transitions, 2276 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:25,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:25,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:32:25,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:26,350 INFO L124 PetriNetUnfolderBase]: 1945/3076 cut-off events. [2024-06-21 17:32:26,350 INFO L125 PetriNetUnfolderBase]: For 95188/95258 co-relation queries the response was YES. [2024-06-21 17:32:26,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22042 conditions, 3076 events. 1945/3076 cut-off events. For 95188/95258 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16535 event pairs, 443 based on Foata normal form. 25/3056 useless extension candidates. Maximal degree in co-relation 21961. Up to 2705 conditions per place. [2024-06-21 17:32:26,379 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 172 selfloop transitions, 35 changer transitions 0/249 dead transitions. [2024-06-21 17:32:26,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 249 transitions, 2928 flow [2024-06-21 17:32:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 17:32:26,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-21 17:32:26,381 INFO L175 Difference]: Start difference. First operand has 168 places, 211 transitions, 2276 flow. Second operand 8 states and 167 transitions. [2024-06-21 17:32:26,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 249 transitions, 2928 flow [2024-06-21 17:32:26,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 249 transitions, 2795 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:26,458 INFO L231 Difference]: Finished difference. Result has 170 places, 217 transitions, 2314 flow [2024-06-21 17:32:26,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2314, PETRI_PLACES=170, PETRI_TRANSITIONS=217} [2024-06-21 17:32:26,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-21 17:32:26,460 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 217 transitions, 2314 flow [2024-06-21 17:32:26,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:26,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:26,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:26,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:32:26,460 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 17:32:26,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2122251089, now seen corresponding path program 2 times [2024-06-21 17:32:26,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:26,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420403764] [2024-06-21 17:32:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:26,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:27,432 INFO 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 17:32:27,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:27,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420403764] [2024-06-21 17:32:27,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420403764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:27,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:27,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:27,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852511821] [2024-06-21 17:32:27,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:27,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:27,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:27,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:27,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:27,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 217 transitions, 2314 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 17:32:27,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:27,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:27,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:28,279 INFO L124 PetriNetUnfolderBase]: 2071/3242 cut-off events. [2024-06-21 17:32:28,279 INFO L125 PetriNetUnfolderBase]: For 91891/91891 co-relation queries the response was YES. [2024-06-21 17:32:28,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23214 conditions, 3242 events. 2071/3242 cut-off events. For 91891/91891 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17172 event pairs, 493 based on Foata normal form. 2/3242 useless extension candidates. Maximal degree in co-relation 23131. Up to 3017 conditions per place. [2024-06-21 17:32:28,308 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 218 selfloop transitions, 33 changer transitions 0/256 dead transitions. [2024-06-21 17:32:28,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 256 transitions, 3024 flow [2024-06-21 17:32:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:32:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:32:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 17:32:28,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-21 17:32:28,310 INFO L175 Difference]: Start difference. First operand has 170 places, 217 transitions, 2314 flow. Second operand 10 states and 186 transitions. [2024-06-21 17:32:28,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 256 transitions, 3024 flow [2024-06-21 17:32:28,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 256 transitions, 2922 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:28,392 INFO L231 Difference]: Finished difference. Result has 174 places, 223 transitions, 2384 flow [2024-06-21 17:32:28,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2384, PETRI_PLACES=174, PETRI_TRANSITIONS=223} [2024-06-21 17:32:28,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 17:32:28,392 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 223 transitions, 2384 flow [2024-06-21 17:32:28,392 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 17:32:28,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:28,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:28,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:32:28,393 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 17:32:28,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1343405899, now seen corresponding path program 5 times [2024-06-21 17:32:28,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:28,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605364338] [2024-06-21 17:32:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:28,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:29,159 INFO 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 17:32:29,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:29,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605364338] [2024-06-21 17:32:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605364338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:29,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:29,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:29,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385148638] [2024-06-21 17:32:29,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:29,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:29,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:32:29,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 223 transitions, 2384 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:29,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:29,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:32:29,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:29,966 INFO L124 PetriNetUnfolderBase]: 2005/3175 cut-off events. [2024-06-21 17:32:29,966 INFO L125 PetriNetUnfolderBase]: For 107607/107681 co-relation queries the response was YES. [2024-06-21 17:32:29,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23033 conditions, 3175 events. 2005/3175 cut-off events. For 107607/107681 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17209 event pairs, 444 based on Foata normal form. 25/3151 useless extension candidates. Maximal degree in co-relation 22950. Up to 2685 conditions per place. [2024-06-21 17:32:29,996 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 172 selfloop transitions, 46 changer transitions 0/262 dead transitions. [2024-06-21 17:32:29,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 262 transitions, 3144 flow [2024-06-21 17:32:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 17:32:29,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 17:32:29,997 INFO L175 Difference]: Start difference. First operand has 174 places, 223 transitions, 2384 flow. Second operand 8 states and 168 transitions. [2024-06-21 17:32:29,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 262 transitions, 3144 flow [2024-06-21 17:32:30,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 262 transitions, 3018 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:30,077 INFO L231 Difference]: Finished difference. Result has 176 places, 229 transitions, 2448 flow [2024-06-21 17:32:30,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2448, PETRI_PLACES=176, PETRI_TRANSITIONS=229} [2024-06-21 17:32:30,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-21 17:32:30,078 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 229 transitions, 2448 flow [2024-06-21 17:32:30,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 17:32:30,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:30,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:32:30,078 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 17:32:30,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash -250520439, now seen corresponding path program 3 times [2024-06-21 17:32:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311787768] [2024-06-21 17:32:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:31,203 INFO 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 17:32:31,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:31,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311787768] [2024-06-21 17:32:31,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311787768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:31,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:31,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:31,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150588628] [2024-06-21 17:32:31,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:31,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:31,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:31,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:31,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 229 transitions, 2448 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 17:32:31,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:31,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:31,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:32,124 INFO L124 PetriNetUnfolderBase]: 2145/3356 cut-off events. [2024-06-21 17:32:32,125 INFO L125 PetriNetUnfolderBase]: For 104415/104415 co-relation queries the response was YES. [2024-06-21 17:32:32,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24662 conditions, 3356 events. 2145/3356 cut-off events. For 104415/104415 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17884 event pairs, 501 based on Foata normal form. 2/3352 useless extension candidates. Maximal degree in co-relation 24577. Up to 3049 conditions per place. [2024-06-21 17:32:32,154 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 213 selfloop transitions, 53 changer transitions 0/271 dead transitions. [2024-06-21 17:32:32,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 271 transitions, 3386 flow [2024-06-21 17:32:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:32:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:32:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 17:32:32,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:32:32,155 INFO L175 Difference]: Start difference. First operand has 176 places, 229 transitions, 2448 flow. Second operand 10 states and 190 transitions. [2024-06-21 17:32:32,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 271 transitions, 3386 flow [2024-06-21 17:32:32,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 271 transitions, 3269 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:32,243 INFO L231 Difference]: Finished difference. Result has 181 places, 238 transitions, 2621 flow [2024-06-21 17:32:32,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2621, PETRI_PLACES=181, PETRI_TRANSITIONS=238} [2024-06-21 17:32:32,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-21 17:32:32,244 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 238 transitions, 2621 flow [2024-06-21 17:32:32,244 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 17:32:32,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:32,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:32,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:32:32,245 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 17:32:32,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:32,245 INFO L85 PathProgramCache]: Analyzing trace with hash -888939221, now seen corresponding path program 4 times [2024-06-21 17:32:32,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:32,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969269741] [2024-06-21 17:32:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:32,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:33,343 INFO 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 17:32:33,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:33,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969269741] [2024-06-21 17:32:33,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969269741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:33,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:33,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596273333] [2024-06-21 17:32:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:33,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:33,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:33,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 238 transitions, 2621 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 17:32:33,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:33,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:33,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:34,132 INFO L124 PetriNetUnfolderBase]: 2156/3377 cut-off events. [2024-06-21 17:32:34,132 INFO L125 PetriNetUnfolderBase]: For 111219/111219 co-relation queries the response was YES. [2024-06-21 17:32:34,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25051 conditions, 3377 events. 2156/3377 cut-off events. For 111219/111219 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18064 event pairs, 501 based on Foata normal form. 2/3373 useless extension candidates. Maximal degree in co-relation 24965. Up to 3072 conditions per place. [2024-06-21 17:32:34,166 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 212 selfloop transitions, 55 changer transitions 0/272 dead transitions. [2024-06-21 17:32:34,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 272 transitions, 3345 flow [2024-06-21 17:32:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:32:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:32:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 17:32:34,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-21 17:32:34,179 INFO L175 Difference]: Start difference. First operand has 181 places, 238 transitions, 2621 flow. Second operand 10 states and 186 transitions. [2024-06-21 17:32:34,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 272 transitions, 3345 flow [2024-06-21 17:32:34,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 272 transitions, 3208 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:34,281 INFO L231 Difference]: Finished difference. Result has 186 places, 241 transitions, 2688 flow [2024-06-21 17:32:34,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2688, PETRI_PLACES=186, PETRI_TRANSITIONS=241} [2024-06-21 17:32:34,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 17:32:34,282 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 241 transitions, 2688 flow [2024-06-21 17:32:34,282 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 17:32:34,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:34,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:34,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:32:34,283 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 17:32:34,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash -250757589, now seen corresponding path program 5 times [2024-06-21 17:32:34,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:34,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29453140] [2024-06-21 17:32:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:34,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:35,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:35,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29453140] [2024-06-21 17:32:35,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29453140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:35,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:35,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:35,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929575309] [2024-06-21 17:32:35,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:35,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:35,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:35,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:35,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 241 transitions, 2688 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 17:32:35,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:35,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:35,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:36,165 INFO L124 PetriNetUnfolderBase]: 2167/3393 cut-off events. [2024-06-21 17:32:36,166 INFO L125 PetriNetUnfolderBase]: For 118329/118329 co-relation queries the response was YES. [2024-06-21 17:32:36,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25689 conditions, 3393 events. 2167/3393 cut-off events. For 118329/118329 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18172 event pairs, 501 based on Foata normal form. 2/3389 useless extension candidates. Maximal degree in co-relation 25601. Up to 3106 conditions per place. [2024-06-21 17:32:36,198 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 219 selfloop transitions, 47 changer transitions 0/271 dead transitions. [2024-06-21 17:32:36,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 271 transitions, 3382 flow [2024-06-21 17:32:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:32:36,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 17:32:36,199 INFO L175 Difference]: Start difference. First operand has 186 places, 241 transitions, 2688 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:32:36,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 271 transitions, 3382 flow [2024-06-21 17:32:36,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 271 transitions, 3196 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 17:32:36,315 INFO L231 Difference]: Finished difference. Result has 187 places, 244 transitions, 2676 flow [2024-06-21 17:32:36,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2502, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2676, PETRI_PLACES=187, PETRI_TRANSITIONS=244} [2024-06-21 17:32:36,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-21 17:32:36,316 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 244 transitions, 2676 flow [2024-06-21 17:32:36,316 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 17:32:36,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:36,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:36,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:32:36,317 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 17:32:36,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:36,317 INFO L85 PathProgramCache]: Analyzing trace with hash -257186679, now seen corresponding path program 6 times [2024-06-21 17:32:36,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:36,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443102066] [2024-06-21 17:32:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:36,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:37,304 INFO 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 17:32:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:37,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443102066] [2024-06-21 17:32:37,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443102066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:37,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:37,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:37,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613577762] [2024-06-21 17:32:37,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:37,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:37,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:37,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:37,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:37,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 244 transitions, 2676 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 17:32:37,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:37,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:37,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:38,138 INFO L124 PetriNetUnfolderBase]: 2162/3386 cut-off events. [2024-06-21 17:32:38,138 INFO L125 PetriNetUnfolderBase]: For 121615/121615 co-relation queries the response was YES. [2024-06-21 17:32:38,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25570 conditions, 3386 events. 2162/3386 cut-off events. For 121615/121615 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18129 event pairs, 501 based on Foata normal form. 2/3382 useless extension candidates. Maximal degree in co-relation 25481. Up to 3099 conditions per place. [2024-06-21 17:32:38,170 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 218 selfloop transitions, 48 changer transitions 0/271 dead transitions. [2024-06-21 17:32:38,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 271 transitions, 3304 flow [2024-06-21 17:32:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:32:38,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 17:32:38,172 INFO L175 Difference]: Start difference. First operand has 187 places, 244 transitions, 2676 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:32:38,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 271 transitions, 3304 flow [2024-06-21 17:32:38,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 271 transitions, 3116 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:38,299 INFO L231 Difference]: Finished difference. Result has 189 places, 244 transitions, 2592 flow [2024-06-21 17:32:38,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2592, PETRI_PLACES=189, PETRI_TRANSITIONS=244} [2024-06-21 17:32:38,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-21 17:32:38,300 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 244 transitions, 2592 flow [2024-06-21 17:32:38,300 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 17:32:38,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:38,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:38,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:32:38,301 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 17:32:38,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:38,301 INFO L85 PathProgramCache]: Analyzing trace with hash -603839351, now seen corresponding path program 7 times [2024-06-21 17:32:38,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:38,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362430371] [2024-06-21 17:32:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:38,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:39,363 INFO 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 17:32:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362430371] [2024-06-21 17:32:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362430371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:39,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:39,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:39,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006878435] [2024-06-21 17:32:39,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:39,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:39,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:39,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:39,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 244 transitions, 2592 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 17:32:39,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:39,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:39,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:40,296 INFO L124 PetriNetUnfolderBase]: 2157/3379 cut-off events. [2024-06-21 17:32:40,297 INFO L125 PetriNetUnfolderBase]: For 125684/125684 co-relation queries the response was YES. [2024-06-21 17:32:40,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25412 conditions, 3379 events. 2157/3379 cut-off events. For 125684/125684 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18130 event pairs, 501 based on Foata normal form. 2/3375 useless extension candidates. Maximal degree in co-relation 25322. Up to 2979 conditions per place. [2024-06-21 17:32:40,329 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 194 selfloop transitions, 83 changer transitions 0/282 dead transitions. [2024-06-21 17:32:40,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 282 transitions, 3356 flow [2024-06-21 17:32:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:32:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:32:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 17:32:40,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 17:32:40,331 INFO L175 Difference]: Start difference. First operand has 189 places, 244 transitions, 2592 flow. Second operand 11 states and 205 transitions. [2024-06-21 17:32:40,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 282 transitions, 3356 flow [2024-06-21 17:32:40,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 282 transitions, 3224 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 17:32:40,456 INFO L231 Difference]: Finished difference. Result has 191 places, 247 transitions, 2730 flow [2024-06-21 17:32:40,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2730, PETRI_PLACES=191, PETRI_TRANSITIONS=247} [2024-06-21 17:32:40,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-21 17:32:40,457 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 247 transitions, 2730 flow [2024-06-21 17:32:40,457 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 17:32:40,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:40,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:40,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:32:40,458 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 17:32:40,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:40,458 INFO L85 PathProgramCache]: Analyzing trace with hash -447338978, now seen corresponding path program 1 times [2024-06-21 17:32:40,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:40,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357057599] [2024-06-21 17:32:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:40,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:41,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:41,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357057599] [2024-06-21 17:32:41,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357057599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:41,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:41,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:32:41,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711965551] [2024-06-21 17:32:41,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:41,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:32:41,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:32:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:32:41,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:41,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 247 transitions, 2730 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 17:32:41,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:41,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:41,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:41,673 INFO L124 PetriNetUnfolderBase]: 2162/3388 cut-off events. [2024-06-21 17:32:41,673 INFO L125 PetriNetUnfolderBase]: For 132958/132958 co-relation queries the response was YES. [2024-06-21 17:32:41,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25995 conditions, 3388 events. 2162/3388 cut-off events. For 132958/132958 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18183 event pairs, 521 based on Foata normal form. 1/3387 useless extension candidates. Maximal degree in co-relation 25906. Up to 3226 conditions per place. [2024-06-21 17:32:41,705 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 21 changer transitions 0/270 dead transitions. [2024-06-21 17:32:41,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 270 transitions, 3490 flow [2024-06-21 17:32:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:32:41,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 17:32:41,707 INFO L175 Difference]: Start difference. First operand has 191 places, 247 transitions, 2730 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:32:41,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 270 transitions, 3490 flow [2024-06-21 17:32:41,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 270 transitions, 3246 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-21 17:32:41,836 INFO L231 Difference]: Finished difference. Result has 189 places, 253 transitions, 2642 flow [2024-06-21 17:32:41,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2642, PETRI_PLACES=189, PETRI_TRANSITIONS=253} [2024-06-21 17:32:41,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-21 17:32:41,837 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 253 transitions, 2642 flow [2024-06-21 17:32:41,837 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 17:32:41,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:41,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:41,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:32:41,838 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 17:32:41,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash -629114308, now seen corresponding path program 1 times [2024-06-21 17:32:41,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:41,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540176540] [2024-06-21 17:32:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:41,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:42,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:42,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540176540] [2024-06-21 17:32:42,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540176540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:42,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:32:42,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100510514] [2024-06-21 17:32:42,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:42,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:32:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:32:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:32:42,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:42,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 253 transitions, 2642 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 17:32:42,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:42,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:42,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:43,096 INFO L124 PetriNetUnfolderBase]: 2237/3511 cut-off events. [2024-06-21 17:32:43,096 INFO L125 PetriNetUnfolderBase]: For 134231/134231 co-relation queries the response was YES. [2024-06-21 17:32:43,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26142 conditions, 3511 events. 2237/3511 cut-off events. For 134231/134231 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19056 event pairs, 502 based on Foata normal form. 6/3511 useless extension candidates. Maximal degree in co-relation 26052. Up to 3115 conditions per place. [2024-06-21 17:32:43,133 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 228 selfloop transitions, 60 changer transitions 0/293 dead transitions. [2024-06-21 17:32:43,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 293 transitions, 3589 flow [2024-06-21 17:32:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 17:32:43,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-21 17:32:43,135 INFO L175 Difference]: Start difference. First operand has 189 places, 253 transitions, 2642 flow. Second operand 7 states and 138 transitions. [2024-06-21 17:32:43,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 293 transitions, 3589 flow [2024-06-21 17:32:43,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 293 transitions, 3523 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:43,270 INFO L231 Difference]: Finished difference. Result has 194 places, 271 transitions, 2882 flow [2024-06-21 17:32:43,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2882, PETRI_PLACES=194, PETRI_TRANSITIONS=271} [2024-06-21 17:32:43,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-21 17:32:43,271 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 271 transitions, 2882 flow [2024-06-21 17:32:43,272 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 17:32:43,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:43,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:43,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:32:43,272 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 17:32:43,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:43,272 INFO L85 PathProgramCache]: Analyzing trace with hash -629114494, now seen corresponding path program 2 times [2024-06-21 17:32:43,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:43,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398321730] [2024-06-21 17:32:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:43,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:43,852 INFO 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 17:32:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:43,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398321730] [2024-06-21 17:32:43,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398321730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:43,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:43,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:32:43,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601191339] [2024-06-21 17:32:43,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:43,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:32:43,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:32:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:32:43,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:43,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 271 transitions, 2882 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 17:32:43,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:43,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:43,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:44,506 INFO L124 PetriNetUnfolderBase]: 2242/3518 cut-off events. [2024-06-21 17:32:44,507 INFO L125 PetriNetUnfolderBase]: For 136515/136515 co-relation queries the response was YES. [2024-06-21 17:32:44,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26631 conditions, 3518 events. 2242/3518 cut-off events. For 136515/136515 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19081 event pairs, 527 based on Foata normal form. 1/3517 useless extension candidates. Maximal degree in co-relation 26538. Up to 3350 conditions per place. [2024-06-21 17:32:44,538 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 19 changer transitions 0/288 dead transitions. [2024-06-21 17:32:44,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 288 transitions, 3556 flow [2024-06-21 17:32:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:32:44,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 17:32:44,540 INFO L175 Difference]: Start difference. First operand has 194 places, 271 transitions, 2882 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:32:44,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 288 transitions, 3556 flow [2024-06-21 17:32:44,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 288 transitions, 3472 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:44,658 INFO L231 Difference]: Finished difference. Result has 198 places, 275 transitions, 2912 flow [2024-06-21 17:32:44,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2912, PETRI_PLACES=198, PETRI_TRANSITIONS=275} [2024-06-21 17:32:44,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-21 17:32:44,658 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 275 transitions, 2912 flow [2024-06-21 17:32:44,659 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 17:32:44,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:44,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:44,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:32:44,659 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 17:32:44,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash -12808382, now seen corresponding path program 2 times [2024-06-21 17:32:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:44,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058242702] [2024-06-21 17:32:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:44,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:45,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:45,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058242702] [2024-06-21 17:32:45,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058242702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:45,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:45,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:32:45,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175760032] [2024-06-21 17:32:45,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:45,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:32:45,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:45,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:32:45,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:32:45,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:45,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 275 transitions, 2912 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 17:32:45,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:45,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:45,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:45,855 INFO L124 PetriNetUnfolderBase]: 2272/3560 cut-off events. [2024-06-21 17:32:45,856 INFO L125 PetriNetUnfolderBase]: For 146235/146235 co-relation queries the response was YES. [2024-06-21 17:32:45,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26824 conditions, 3560 events. 2272/3560 cut-off events. For 146235/146235 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19342 event pairs, 498 based on Foata normal form. 6/3560 useless extension candidates. Maximal degree in co-relation 26730. Up to 3144 conditions per place. [2024-06-21 17:32:45,893 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 64 changer transitions 0/296 dead transitions. [2024-06-21 17:32:45,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 296 transitions, 3719 flow [2024-06-21 17:32:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:32:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:32:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 17:32:45,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 17:32:45,895 INFO L175 Difference]: Start difference. First operand has 198 places, 275 transitions, 2912 flow. Second operand 6 states and 120 transitions. [2024-06-21 17:32:45,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 296 transitions, 3719 flow [2024-06-21 17:32:46,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 296 transitions, 3641 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:46,040 INFO L231 Difference]: Finished difference. Result has 200 places, 279 transitions, 3025 flow [2024-06-21 17:32:46,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3025, PETRI_PLACES=200, PETRI_TRANSITIONS=279} [2024-06-21 17:32:46,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-21 17:32:46,041 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 279 transitions, 3025 flow [2024-06-21 17:32:46,041 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 17:32:46,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:46,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:46,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:32:46,041 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:46,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:46,042 INFO L85 PathProgramCache]: Analyzing trace with hash -12808568, now seen corresponding path program 3 times [2024-06-21 17:32:46,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:46,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047015009] [2024-06-21 17:32:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:46,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:46,572 INFO 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 17:32:46,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:46,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047015009] [2024-06-21 17:32:46,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047015009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:46,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:46,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:32:46,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066515906] [2024-06-21 17:32:46,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:46,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:32:46,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:32:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:32:46,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:46,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 279 transitions, 3025 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 17:32:46,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:46,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:46,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:47,229 INFO L124 PetriNetUnfolderBase]: 2269/3556 cut-off events. [2024-06-21 17:32:47,230 INFO L125 PetriNetUnfolderBase]: For 147386/147386 co-relation queries the response was YES. [2024-06-21 17:32:47,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27146 conditions, 3556 events. 2269/3556 cut-off events. For 147386/147386 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19271 event pairs, 527 based on Foata normal form. 1/3555 useless extension candidates. Maximal degree in co-relation 27051. Up to 3382 conditions per place. [2024-06-21 17:32:47,264 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 270 selfloop transitions, 19 changer transitions 0/294 dead transitions. [2024-06-21 17:32:47,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 294 transitions, 3657 flow [2024-06-21 17:32:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:32:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:32:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 17:32:47,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:32:47,266 INFO L175 Difference]: Start difference. First operand has 200 places, 279 transitions, 3025 flow. Second operand 6 states and 114 transitions. [2024-06-21 17:32:47,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 294 transitions, 3657 flow [2024-06-21 17:32:47,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 294 transitions, 3544 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:47,403 INFO L231 Difference]: Finished difference. Result has 203 places, 279 transitions, 2960 flow [2024-06-21 17:32:47,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2960, PETRI_PLACES=203, PETRI_TRANSITIONS=279} [2024-06-21 17:32:47,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 17:32:47,406 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 279 transitions, 2960 flow [2024-06-21 17:32:47,408 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 17:32:47,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:47,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:47,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:32:47,409 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:47,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash -12801872, now seen corresponding path program 3 times [2024-06-21 17:32:47,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:47,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917285273] [2024-06-21 17:32:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:47,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:47,888 INFO 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 17:32:47,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:47,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917285273] [2024-06-21 17:32:47,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917285273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:47,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:47,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:32:47,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707775929] [2024-06-21 17:32:47,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:47,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:32:47,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:47,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:32:47,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:32:47,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:47,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 279 transitions, 2960 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 17:32:47,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:47,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:47,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:48,526 INFO L124 PetriNetUnfolderBase]: 2230/3486 cut-off events. [2024-06-21 17:32:48,526 INFO L125 PetriNetUnfolderBase]: For 143715/143715 co-relation queries the response was YES. [2024-06-21 17:32:48,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26329 conditions, 3486 events. 2230/3486 cut-off events. For 143715/143715 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18718 event pairs, 497 based on Foata normal form. 6/3486 useless extension candidates. Maximal degree in co-relation 26233. Up to 3288 conditions per place. [2024-06-21 17:32:48,560 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 24 changer transitions 0/290 dead transitions. [2024-06-21 17:32:48,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 290 transitions, 3592 flow [2024-06-21 17:32:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:32:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:32:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 17:32:48,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 17:32:48,562 INFO L175 Difference]: Start difference. First operand has 203 places, 279 transitions, 2960 flow. Second operand 6 states and 112 transitions. [2024-06-21 17:32:48,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 290 transitions, 3592 flow [2024-06-21 17:32:48,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 290 transitions, 3540 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:48,732 INFO L231 Difference]: Finished difference. Result has 204 places, 279 transitions, 2963 flow [2024-06-21 17:32:48,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2963, PETRI_PLACES=204, PETRI_TRANSITIONS=279} [2024-06-21 17:32:48,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 17:32:48,733 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 279 transitions, 2963 flow [2024-06-21 17:32:48,733 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 17:32:48,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:48,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:48,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:32:48,734 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:48,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash -10230568, now seen corresponding path program 1 times [2024-06-21 17:32:48,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:48,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957152286] [2024-06-21 17:32:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:48,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:49,556 INFO 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 17:32:49,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:49,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957152286] [2024-06-21 17:32:49,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957152286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:49,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:49,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:49,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245585599] [2024-06-21 17:32:49,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:49,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:49,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:49,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 279 transitions, 2963 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:49,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:49,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:49,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:50,284 INFO L124 PetriNetUnfolderBase]: 2269/3559 cut-off events. [2024-06-21 17:32:50,284 INFO L125 PetriNetUnfolderBase]: For 154224/154224 co-relation queries the response was YES. [2024-06-21 17:32:50,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26747 conditions, 3559 events. 2269/3559 cut-off events. For 154224/154224 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19225 event pairs, 513 based on Foata normal form. 14/3561 useless extension candidates. Maximal degree in co-relation 26650. Up to 3228 conditions per place. [2024-06-21 17:32:50,322 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 250 selfloop transitions, 42 changer transitions 0/297 dead transitions. [2024-06-21 17:32:50,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 297 transitions, 3699 flow [2024-06-21 17:32:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:32:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:32:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 17:32:50,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-21 17:32:50,324 INFO L175 Difference]: Start difference. First operand has 204 places, 279 transitions, 2963 flow. Second operand 6 states and 118 transitions. [2024-06-21 17:32:50,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 297 transitions, 3699 flow [2024-06-21 17:32:50,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 297 transitions, 3551 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:50,499 INFO L231 Difference]: Finished difference. Result has 204 places, 281 transitions, 2937 flow [2024-06-21 17:32:50,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2937, PETRI_PLACES=204, PETRI_TRANSITIONS=281} [2024-06-21 17:32:50,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 17:32:50,499 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 281 transitions, 2937 flow [2024-06-21 17:32:50,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:50,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:50,500 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 17:32:50,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:32:50,500 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 17:32:50,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash -385290856, now seen corresponding path program 1 times [2024-06-21 17:32:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:50,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752191008] [2024-06-21 17:32:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:51,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:51,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752191008] [2024-06-21 17:32:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752191008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:51,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357759292] [2024-06-21 17:32:51,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:51,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:51,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:51,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 281 transitions, 2937 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 17:32:51,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:51,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:51,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:52,202 INFO L124 PetriNetUnfolderBase]: 2286/3594 cut-off events. [2024-06-21 17:32:52,202 INFO L125 PetriNetUnfolderBase]: For 151822/151822 co-relation queries the response was YES. [2024-06-21 17:32:52,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27167 conditions, 3594 events. 2286/3594 cut-off events. For 151822/151822 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19538 event pairs, 331 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 27070. Up to 3245 conditions per place. [2024-06-21 17:32:52,241 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 28 changer transitions 0/323 dead transitions. [2024-06-21 17:32:52,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 323 transitions, 3843 flow [2024-06-21 17:32:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:32:52,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 17:32:52,244 INFO L175 Difference]: Start difference. First operand has 204 places, 281 transitions, 2937 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:32:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 323 transitions, 3843 flow [2024-06-21 17:32:52,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 323 transitions, 3745 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:52,437 INFO L231 Difference]: Finished difference. Result has 211 places, 289 transitions, 3083 flow [2024-06-21 17:32:52,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3083, PETRI_PLACES=211, PETRI_TRANSITIONS=289} [2024-06-21 17:32:52,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 17:32:52,438 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 289 transitions, 3083 flow [2024-06-21 17:32:52,438 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 17:32:52,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:52,438 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 17:32:52,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:32:52,438 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 17:32:52,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1039563672, now seen corresponding path program 2 times [2024-06-21 17:32:52,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:52,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372213555] [2024-06-21 17:32:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:52,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372213555] [2024-06-21 17:32:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372213555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:53,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:53,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:53,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294772698] [2024-06-21 17:32:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:53,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:53,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:53,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 289 transitions, 3083 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 17:32:53,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:53,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:53,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:54,198 INFO L124 PetriNetUnfolderBase]: 2328/3652 cut-off events. [2024-06-21 17:32:54,198 INFO L125 PetriNetUnfolderBase]: For 163538/163538 co-relation queries the response was YES. [2024-06-21 17:32:54,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28119 conditions, 3652 events. 2328/3652 cut-off events. For 163538/163538 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19944 event pairs, 442 based on Foata normal form. 4/3654 useless extension candidates. Maximal degree in co-relation 28019. Up to 3332 conditions per place. [2024-06-21 17:32:54,238 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 34 changer transitions 0/329 dead transitions. [2024-06-21 17:32:54,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 329 transitions, 4111 flow [2024-06-21 17:32:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:32:54,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 17:32:54,239 INFO L175 Difference]: Start difference. First operand has 211 places, 289 transitions, 3083 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:32:54,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 329 transitions, 4111 flow [2024-06-21 17:32:54,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 329 transitions, 3973 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:54,429 INFO L231 Difference]: Finished difference. Result has 217 places, 294 transitions, 3143 flow [2024-06-21 17:32:54,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3143, PETRI_PLACES=217, PETRI_TRANSITIONS=294} [2024-06-21 17:32:54,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-21 17:32:54,430 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 294 transitions, 3143 flow [2024-06-21 17:32:54,430 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 17:32:54,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:54,430 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 17:32:54,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:32:54,430 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 17:32:54,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:54,431 INFO L85 PathProgramCache]: Analyzing trace with hash -821265926, now seen corresponding path program 3 times [2024-06-21 17:32:54,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:54,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337790220] [2024-06-21 17:32:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:54,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:55,248 INFO 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 17:32:55,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:55,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337790220] [2024-06-21 17:32:55,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337790220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:55,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:55,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382962432] [2024-06-21 17:32:55,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:55,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:55,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:55,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 294 transitions, 3143 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 17:32:55,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:55,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:55,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:56,128 INFO L124 PetriNetUnfolderBase]: 2320/3640 cut-off events. [2024-06-21 17:32:56,128 INFO L125 PetriNetUnfolderBase]: For 166606/166606 co-relation queries the response was YES. [2024-06-21 17:32:56,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27975 conditions, 3640 events. 2320/3640 cut-off events. For 166606/166606 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19853 event pairs, 447 based on Foata normal form. 4/3642 useless extension candidates. Maximal degree in co-relation 27872. Up to 3372 conditions per place. [2024-06-21 17:32:56,166 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 33 changer transitions 0/327 dead transitions. [2024-06-21 17:32:56,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 327 transitions, 3936 flow [2024-06-21 17:32:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:32:56,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 17:32:56,168 INFO L175 Difference]: Start difference. First operand has 217 places, 294 transitions, 3143 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:32:56,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 327 transitions, 3936 flow [2024-06-21 17:32:56,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 327 transitions, 3744 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:56,349 INFO L231 Difference]: Finished difference. Result has 220 places, 295 transitions, 3066 flow [2024-06-21 17:32:56,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3066, PETRI_PLACES=220, PETRI_TRANSITIONS=295} [2024-06-21 17:32:56,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-21 17:32:56,350 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 295 transitions, 3066 flow [2024-06-21 17:32:56,350 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 17:32:56,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:56,350 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 17:32:56,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:32:56,350 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 17:32:56,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1039717494, now seen corresponding path program 1 times [2024-06-21 17:32:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:56,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193792011] [2024-06-21 17:32:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:56,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:57,475 INFO 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 17:32:57,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:57,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193792011] [2024-06-21 17:32:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193792011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:57,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:57,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:32:57,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579601860] [2024-06-21 17:32:57,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:32:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:32:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:32:57,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:57,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 295 transitions, 3066 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 17:32:57,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:57,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:57,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:58,366 INFO L124 PetriNetUnfolderBase]: 2378/3737 cut-off events. [2024-06-21 17:32:58,366 INFO L125 PetriNetUnfolderBase]: For 181995/181995 co-relation queries the response was YES. [2024-06-21 17:32:58,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28514 conditions, 3737 events. 2378/3737 cut-off events. For 181995/181995 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20621 event pairs, 458 based on Foata normal form. 16/3751 useless extension candidates. Maximal degree in co-relation 28410. Up to 3340 conditions per place. [2024-06-21 17:32:58,406 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 291 selfloop transitions, 39 changer transitions 0/335 dead transitions. [2024-06-21 17:32:58,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 335 transitions, 3940 flow [2024-06-21 17:32:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:32:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:32:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:32:58,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 17:32:58,407 INFO L175 Difference]: Start difference. First operand has 220 places, 295 transitions, 3066 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:32:58,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 335 transitions, 3940 flow [2024-06-21 17:32:58,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 335 transitions, 3878 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:58,675 INFO L231 Difference]: Finished difference. Result has 223 places, 296 transitions, 3132 flow [2024-06-21 17:32:58,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3132, PETRI_PLACES=223, PETRI_TRANSITIONS=296} [2024-06-21 17:32:58,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-21 17:32:58,676 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 296 transitions, 3132 flow [2024-06-21 17:32:58,676 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 17:32:58,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:58,676 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 17:32:58,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:32:58,677 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 17:32:58,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1357918164, now seen corresponding path program 4 times [2024-06-21 17:32:58,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:58,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341033229] [2024-06-21 17:32:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:58,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:59,566 INFO 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 17:32:59,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:59,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341033229] [2024-06-21 17:32:59,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341033229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:59,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:59,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:59,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287259412] [2024-06-21 17:32:59,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:59,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:59,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:59,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:59,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:32:59,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 296 transitions, 3132 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 17:32:59,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:59,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:32:59,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:00,536 INFO L124 PetriNetUnfolderBase]: 2395/3764 cut-off events. [2024-06-21 17:33:00,536 INFO L125 PetriNetUnfolderBase]: For 180501/180501 co-relation queries the response was YES. [2024-06-21 17:33:00,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28966 conditions, 3764 events. 2395/3764 cut-off events. For 180501/180501 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20763 event pairs, 464 based on Foata normal form. 4/3766 useless extension candidates. Maximal degree in co-relation 28861. Up to 3529 conditions per place. [2024-06-21 17:33:00,571 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 26 changer transitions 0/328 dead transitions. [2024-06-21 17:33:00,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 328 transitions, 3936 flow [2024-06-21 17:33:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:33:00,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 17:33:00,592 INFO L175 Difference]: Start difference. First operand has 223 places, 296 transitions, 3132 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:33:00,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 328 transitions, 3936 flow [2024-06-21 17:33:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 328 transitions, 3852 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:00,799 INFO L231 Difference]: Finished difference. Result has 224 places, 298 transitions, 3165 flow [2024-06-21 17:33:00,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3165, PETRI_PLACES=224, PETRI_TRANSITIONS=298} [2024-06-21 17:33:00,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 17:33:00,799 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 298 transitions, 3165 flow [2024-06-21 17:33:00,799 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 17:33:00,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:00,800 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 17:33:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:33:00,800 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 17:33:00,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1557134214, now seen corresponding path program 5 times [2024-06-21 17:33:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:00,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694010147] [2024-06-21 17:33:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:01,638 INFO 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 17:33:01,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:01,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694010147] [2024-06-21 17:33:01,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694010147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:01,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:01,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:01,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656751699] [2024-06-21 17:33:01,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:01,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:01,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:01,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:01,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 298 transitions, 3165 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 17:33:01,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:01,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:01,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:02,617 INFO L124 PetriNetUnfolderBase]: 2412/3791 cut-off events. [2024-06-21 17:33:02,617 INFO L125 PetriNetUnfolderBase]: For 187132/187132 co-relation queries the response was YES. [2024-06-21 17:33:02,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29328 conditions, 3791 events. 2412/3791 cut-off events. For 187132/187132 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20937 event pairs, 474 based on Foata normal form. 4/3793 useless extension candidates. Maximal degree in co-relation 29222. Up to 3556 conditions per place. [2024-06-21 17:33:02,658 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 299 selfloop transitions, 26 changer transitions 0/330 dead transitions. [2024-06-21 17:33:02,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 330 transitions, 3977 flow [2024-06-21 17:33:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:33:02,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 17:33:02,659 INFO L175 Difference]: Start difference. First operand has 224 places, 298 transitions, 3165 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:33:02,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 330 transitions, 3977 flow [2024-06-21 17:33:02,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 330 transitions, 3878 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:02,864 INFO L231 Difference]: Finished difference. Result has 226 places, 300 transitions, 3187 flow [2024-06-21 17:33:02,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3066, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3187, PETRI_PLACES=226, PETRI_TRANSITIONS=300} [2024-06-21 17:33:02,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 17:33:02,864 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 300 transitions, 3187 flow [2024-06-21 17:33:02,864 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 17:33:02,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:02,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:02,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:33:02,865 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 17:33:02,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:02,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1158468504, now seen corresponding path program 6 times [2024-06-21 17:33:02,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:02,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012201129] [2024-06-21 17:33:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:02,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:03,581 INFO 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 17:33:03,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:03,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012201129] [2024-06-21 17:33:03,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012201129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:03,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:03,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205921270] [2024-06-21 17:33:03,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:03,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:03,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:03,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:03,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:03,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:03,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 300 transitions, 3187 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 17:33:03,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:03,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:03,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:04,475 INFO L124 PetriNetUnfolderBase]: 2429/3818 cut-off events. [2024-06-21 17:33:04,475 INFO L125 PetriNetUnfolderBase]: For 195032/195032 co-relation queries the response was YES. [2024-06-21 17:33:04,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29721 conditions, 3818 events. 2429/3818 cut-off events. For 195032/195032 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21147 event pairs, 467 based on Foata normal form. 4/3820 useless extension candidates. Maximal degree in co-relation 29614. Up to 3524 conditions per place. [2024-06-21 17:33:04,515 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 299 selfloop transitions, 31 changer transitions 0/335 dead transitions. [2024-06-21 17:33:04,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 335 transitions, 4067 flow [2024-06-21 17:33:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:33:04,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 17:33:04,517 INFO L175 Difference]: Start difference. First operand has 226 places, 300 transitions, 3187 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:33:04,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 335 transitions, 4067 flow [2024-06-21 17:33:04,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 335 transitions, 3949 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:04,735 INFO L231 Difference]: Finished difference. Result has 229 places, 304 transitions, 3267 flow [2024-06-21 17:33:04,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3069, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3267, PETRI_PLACES=229, PETRI_TRANSITIONS=304} [2024-06-21 17:33:04,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-21 17:33:04,735 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 304 transitions, 3267 flow [2024-06-21 17:33:04,735 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 17:33:04,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:04,736 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 17:33:04,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:33:04,736 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 17:33:04,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:04,736 INFO L85 PathProgramCache]: Analyzing trace with hash -416217392, now seen corresponding path program 2 times [2024-06-21 17:33:04,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:04,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956158862] [2024-06-21 17:33:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:04,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:05,818 INFO 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 17:33:05,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:05,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956158862] [2024-06-21 17:33:05,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956158862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:05,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:05,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:05,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457570433] [2024-06-21 17:33:05,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:05,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:05,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:05,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:05,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 304 transitions, 3267 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 17:33:05,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:05,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:05,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:06,869 INFO L124 PetriNetUnfolderBase]: 2498/3942 cut-off events. [2024-06-21 17:33:06,870 INFO L125 PetriNetUnfolderBase]: For 217757/217757 co-relation queries the response was YES. [2024-06-21 17:33:06,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30794 conditions, 3942 events. 2498/3942 cut-off events. For 217757/217757 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22105 event pairs, 489 based on Foata normal form. 16/3956 useless extension candidates. Maximal degree in co-relation 30686. Up to 3586 conditions per place. [2024-06-21 17:33:06,914 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 311 selfloop transitions, 29 changer transitions 0/345 dead transitions. [2024-06-21 17:33:06,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 345 transitions, 4179 flow [2024-06-21 17:33:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 17:33:06,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 17:33:06,916 INFO L175 Difference]: Start difference. First operand has 229 places, 304 transitions, 3267 flow. Second operand 10 states and 188 transitions. [2024-06-21 17:33:06,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 345 transitions, 4179 flow [2024-06-21 17:33:07,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 345 transitions, 4050 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:07,183 INFO L231 Difference]: Finished difference. Result has 235 places, 308 transitions, 3277 flow [2024-06-21 17:33:07,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3277, PETRI_PLACES=235, PETRI_TRANSITIONS=308} [2024-06-21 17:33:07,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 17:33:07,183 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 308 transitions, 3277 flow [2024-06-21 17:33:07,184 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 17:33:07,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:07,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:07,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:33:07,185 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 17:33:07,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash -408598832, now seen corresponding path program 3 times [2024-06-21 17:33:07,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:07,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015693583] [2024-06-21 17:33:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:07,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:08,208 INFO 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 17:33:08,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015693583] [2024-06-21 17:33:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015693583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:08,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:08,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280141420] [2024-06-21 17:33:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:08,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:08,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:08,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:08,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:08,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 308 transitions, 3277 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 17:33:08,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:08,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:08,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:09,264 INFO L124 PetriNetUnfolderBase]: 2840/4513 cut-off events. [2024-06-21 17:33:09,264 INFO L125 PetriNetUnfolderBase]: For 251486/251486 co-relation queries the response was YES. [2024-06-21 17:33:09,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35537 conditions, 4513 events. 2840/4513 cut-off events. For 251486/251486 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26162 event pairs, 475 based on Foata normal form. 12/4521 useless extension candidates. Maximal degree in co-relation 35426. Up to 3852 conditions per place. [2024-06-21 17:33:09,315 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 337 selfloop transitions, 47 changer transitions 0/389 dead transitions. [2024-06-21 17:33:09,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 389 transitions, 5021 flow [2024-06-21 17:33:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 17:33:09,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523281596452328 [2024-06-21 17:33:09,317 INFO L175 Difference]: Start difference. First operand has 235 places, 308 transitions, 3277 flow. Second operand 11 states and 204 transitions. [2024-06-21 17:33:09,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 389 transitions, 5021 flow [2024-06-21 17:33:09,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 389 transitions, 4885 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:09,658 INFO L231 Difference]: Finished difference. Result has 245 places, 345 transitions, 3920 flow [2024-06-21 17:33:09,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3920, PETRI_PLACES=245, PETRI_TRANSITIONS=345} [2024-06-21 17:33:09,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-21 17:33:09,659 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 345 transitions, 3920 flow [2024-06-21 17:33:09,659 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 17:33:09,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:09,660 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 17:33:09,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:33:09,660 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:09,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash -615519182, now seen corresponding path program 4 times [2024-06-21 17:33:09,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:09,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706692217] [2024-06-21 17:33:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:10,821 INFO 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 17:33:10,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706692217] [2024-06-21 17:33:10,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706692217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:10,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:10,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:10,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647353350] [2024-06-21 17:33:10,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:10,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:10,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:10,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:10,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:10,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:10,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 345 transitions, 3920 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 17:33:10,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:10,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:10,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:11,974 INFO L124 PetriNetUnfolderBase]: 2956/4708 cut-off events. [2024-06-21 17:33:11,974 INFO L125 PetriNetUnfolderBase]: For 285918/285918 co-relation queries the response was YES. [2024-06-21 17:33:12,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37461 conditions, 4708 events. 2956/4708 cut-off events. For 285918/285918 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27687 event pairs, 558 based on Foata normal form. 32/4738 useless extension candidates. Maximal degree in co-relation 37343. Up to 4074 conditions per place. [2024-06-21 17:33:12,031 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 312 selfloop transitions, 66 changer transitions 0/383 dead transitions. [2024-06-21 17:33:12,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 383 transitions, 4939 flow [2024-06-21 17:33:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 17:33:12,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:33:12,052 INFO L175 Difference]: Start difference. First operand has 245 places, 345 transitions, 3920 flow. Second operand 10 states and 190 transitions. [2024-06-21 17:33:12,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 383 transitions, 4939 flow [2024-06-21 17:33:12,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 383 transitions, 4887 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-21 17:33:12,457 INFO L231 Difference]: Finished difference. Result has 254 places, 347 transitions, 4115 flow [2024-06-21 17:33:12,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4115, PETRI_PLACES=254, PETRI_TRANSITIONS=347} [2024-06-21 17:33:12,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-21 17:33:12,457 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 347 transitions, 4115 flow [2024-06-21 17:33:12,458 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 17:33:12,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:12,458 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 17:33:12,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:33:12,458 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:12,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash -408865742, now seen corresponding path program 5 times [2024-06-21 17:33:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:12,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129441326] [2024-06-21 17:33:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:13,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:13,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129441326] [2024-06-21 17:33:13,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129441326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:13,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:13,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:13,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549538231] [2024-06-21 17:33:13,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:13,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:13,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:13,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 347 transitions, 4115 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 17:33:13,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:13,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:13,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:14,539 INFO L124 PetriNetUnfolderBase]: 2986/4762 cut-off events. [2024-06-21 17:33:14,539 INFO L125 PetriNetUnfolderBase]: For 281871/281871 co-relation queries the response was YES. [2024-06-21 17:33:14,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37409 conditions, 4762 events. 2986/4762 cut-off events. For 281871/281871 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28158 event pairs, 535 based on Foata normal form. 32/4792 useless extension candidates. Maximal degree in co-relation 37288. Up to 4112 conditions per place. [2024-06-21 17:33:14,586 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 290 selfloop transitions, 89 changer transitions 0/384 dead transitions. [2024-06-21 17:33:14,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 384 transitions, 5089 flow [2024-06-21 17:33:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:33:14,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 17:33:14,588 INFO L175 Difference]: Start difference. First operand has 254 places, 347 transitions, 4115 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:33:14,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 384 transitions, 5089 flow [2024-06-21 17:33:14,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 384 transitions, 4863 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-21 17:33:14,904 INFO L231 Difference]: Finished difference. Result has 254 places, 348 transitions, 4129 flow [2024-06-21 17:33:14,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4129, PETRI_PLACES=254, PETRI_TRANSITIONS=348} [2024-06-21 17:33:14,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-21 17:33:14,905 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 348 transitions, 4129 flow [2024-06-21 17:33:14,905 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 17:33:14,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:14,906 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 17:33:14,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:33:14,906 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 17:33:14,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1503541136, now seen corresponding path program 7 times [2024-06-21 17:33:14,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:14,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039422501] [2024-06-21 17:33:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:14,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:15,676 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 17:33:15,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:15,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039422501] [2024-06-21 17:33:15,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039422501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:15,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:15,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:15,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477850869] [2024-06-21 17:33:15,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:15,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:15,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:15,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:15,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:15,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 348 transitions, 4129 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 17:33:15,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:15,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:15,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:16,813 INFO L124 PetriNetUnfolderBase]: 3003/4789 cut-off events. [2024-06-21 17:33:16,813 INFO L125 PetriNetUnfolderBase]: For 255429/255429 co-relation queries the response was YES. [2024-06-21 17:33:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37525 conditions, 4789 events. 3003/4789 cut-off events. For 255429/255429 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28390 event pairs, 552 based on Foata normal form. 4/4787 useless extension candidates. Maximal degree in co-relation 37405. Up to 4394 conditions per place. [2024-06-21 17:33:16,866 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 61 changer transitions 0/377 dead transitions. [2024-06-21 17:33:16,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 377 transitions, 5039 flow [2024-06-21 17:33:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:33:16,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 17:33:16,868 INFO L175 Difference]: Start difference. First operand has 254 places, 348 transitions, 4129 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:33:16,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 377 transitions, 5039 flow [2024-06-21 17:33:17,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 377 transitions, 4825 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:17,223 INFO L231 Difference]: Finished difference. Result has 255 places, 350 transitions, 4122 flow [2024-06-21 17:33:17,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4122, PETRI_PLACES=255, PETRI_TRANSITIONS=350} [2024-06-21 17:33:17,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-21 17:33:17,224 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 350 transitions, 4122 flow [2024-06-21 17:33:17,224 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 17:33:17,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:17,224 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 17:33:17,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:33:17,225 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 17:33:17,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:17,225 INFO L85 PathProgramCache]: Analyzing trace with hash 616998888, now seen corresponding path program 8 times [2024-06-21 17:33:17,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:17,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697496073] [2024-06-21 17:33:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:17,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:18,023 INFO 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 17:33:18,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:18,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697496073] [2024-06-21 17:33:18,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697496073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:18,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:18,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:18,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584010548] [2024-06-21 17:33:18,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:18,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:18,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:18,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:18,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 350 transitions, 4122 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 17:33:18,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:19,226 INFO L124 PetriNetUnfolderBase]: 3020/4806 cut-off events. [2024-06-21 17:33:19,227 INFO L125 PetriNetUnfolderBase]: For 262600/262600 co-relation queries the response was YES. [2024-06-21 17:33:19,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37616 conditions, 4806 events. 3020/4806 cut-off events. For 262600/262600 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28397 event pairs, 557 based on Foata normal form. 4/4804 useless extension candidates. Maximal degree in co-relation 37495. Up to 4421 conditions per place. [2024-06-21 17:33:19,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 62 changer transitions 0/379 dead transitions. [2024-06-21 17:33:19,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 379 transitions, 5040 flow [2024-06-21 17:33:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:33:19,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 17:33:19,288 INFO L175 Difference]: Start difference. First operand has 255 places, 350 transitions, 4122 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:33:19,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 379 transitions, 5040 flow [2024-06-21 17:33:19,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 379 transitions, 4851 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:19,657 INFO L231 Difference]: Finished difference. Result has 257 places, 352 transitions, 4146 flow [2024-06-21 17:33:19,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3933, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4146, PETRI_PLACES=257, PETRI_TRANSITIONS=352} [2024-06-21 17:33:19,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-21 17:33:19,657 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 352 transitions, 4146 flow [2024-06-21 17:33:19,658 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 17:33:19,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:19,658 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 17:33:19,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:33:19,658 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 17:33:19,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash 616995168, now seen corresponding path program 9 times [2024-06-21 17:33:19,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:19,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11220990] [2024-06-21 17:33:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:19,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11220990] [2024-06-21 17:33:20,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11220990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:20,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:20,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472230759] [2024-06-21 17:33:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:20,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:20,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:20,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 352 transitions, 4146 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 17:33:20,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:20,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:20,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:21,608 INFO L124 PetriNetUnfolderBase]: 3012/4804 cut-off events. [2024-06-21 17:33:21,608 INFO L125 PetriNetUnfolderBase]: For 264299/264299 co-relation queries the response was YES. [2024-06-21 17:33:21,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37402 conditions, 4804 events. 3012/4804 cut-off events. For 264299/264299 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28497 event pairs, 553 based on Foata normal form. 4/4802 useless extension candidates. Maximal degree in co-relation 37280. Up to 4332 conditions per place. [2024-06-21 17:33:21,663 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 69 changer transitions 0/386 dead transitions. [2024-06-21 17:33:21,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 386 transitions, 5193 flow [2024-06-21 17:33:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:33:21,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 17:33:21,665 INFO L175 Difference]: Start difference. First operand has 257 places, 352 transitions, 4146 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:33:21,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 386 transitions, 5193 flow [2024-06-21 17:33:22,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 386 transitions, 4998 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:22,042 INFO L231 Difference]: Finished difference. Result has 260 places, 358 transitions, 4307 flow [2024-06-21 17:33:22,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4307, PETRI_PLACES=260, PETRI_TRANSITIONS=358} [2024-06-21 17:33:22,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 17:33:22,043 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 358 transitions, 4307 flow [2024-06-21 17:33:22,043 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 17:33:22,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:22,043 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 17:33:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:33:22,043 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 17:33:22,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 824069340, now seen corresponding path program 6 times [2024-06-21 17:33:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:22,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516298254] [2024-06-21 17:33:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:22,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:23,056 INFO 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 17:33:23,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:23,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516298254] [2024-06-21 17:33:23,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516298254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:23,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:23,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:23,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755721989] [2024-06-21 17:33:23,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:23,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:23,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:23,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:23,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:23,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:23,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 358 transitions, 4307 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 17:33:23,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:23,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:23,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:24,260 INFO L124 PetriNetUnfolderBase]: 3139/5027 cut-off events. [2024-06-21 17:33:24,261 INFO L125 PetriNetUnfolderBase]: For 313758/313758 co-relation queries the response was YES. [2024-06-21 17:33:24,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40397 conditions, 5027 events. 3139/5027 cut-off events. For 313758/313758 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30337 event pairs, 586 based on Foata normal form. 12/5033 useless extension candidates. Maximal degree in co-relation 40273. Up to 4313 conditions per place. [2024-06-21 17:33:24,323 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 319 selfloop transitions, 75 changer transitions 0/399 dead transitions. [2024-06-21 17:33:24,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 399 transitions, 5615 flow [2024-06-21 17:33:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 17:33:24,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 17:33:24,325 INFO L175 Difference]: Start difference. First operand has 260 places, 358 transitions, 4307 flow. Second operand 10 states and 195 transitions. [2024-06-21 17:33:24,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 399 transitions, 5615 flow [2024-06-21 17:33:24,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 399 transitions, 5382 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:24,824 INFO L231 Difference]: Finished difference. Result has 265 places, 360 transitions, 4348 flow [2024-06-21 17:33:24,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4348, PETRI_PLACES=265, PETRI_TRANSITIONS=360} [2024-06-21 17:33:24,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 17:33:24,824 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 360 transitions, 4348 flow [2024-06-21 17:33:24,825 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 17:33:24,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:24,825 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 17:33:24,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:33:24,825 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 17:33:24,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:24,826 INFO L85 PathProgramCache]: Analyzing trace with hash 823802430, now seen corresponding path program 7 times [2024-06-21 17:33:24,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:24,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342364171] [2024-06-21 17:33:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:24,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:25,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:25,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342364171] [2024-06-21 17:33:25,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342364171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:25,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:25,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523168116] [2024-06-21 17:33:25,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:25,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:25,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:25,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:25,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:25,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 360 transitions, 4348 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 17:33:25,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:25,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:25,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:27,139 INFO L124 PetriNetUnfolderBase]: 3197/5121 cut-off events. [2024-06-21 17:33:27,139 INFO L125 PetriNetUnfolderBase]: For 333352/333352 co-relation queries the response was YES. [2024-06-21 17:33:27,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41315 conditions, 5121 events. 3197/5121 cut-off events. For 333352/333352 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31050 event pairs, 611 based on Foata normal form. 16/5126 useless extension candidates. Maximal degree in co-relation 41189. Up to 4530 conditions per place. [2024-06-21 17:33:27,194 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 304 selfloop transitions, 86 changer transitions 0/395 dead transitions. [2024-06-21 17:33:27,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 395 transitions, 5348 flow [2024-06-21 17:33:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 17:33:27,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-21 17:33:27,195 INFO L175 Difference]: Start difference. First operand has 265 places, 360 transitions, 4348 flow. Second operand 10 states and 191 transitions. [2024-06-21 17:33:27,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 395 transitions, 5348 flow [2024-06-21 17:33:27,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 395 transitions, 5199 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:33:27,696 INFO L231 Difference]: Finished difference. Result has 269 places, 361 transitions, 4440 flow [2024-06-21 17:33:27,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4211, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4440, PETRI_PLACES=269, PETRI_TRANSITIONS=361} [2024-06-21 17:33:27,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-21 17:33:27,697 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 361 transitions, 4440 flow [2024-06-21 17:33:27,697 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 17:33:27,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:27,697 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 17:33:27,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:33:27,698 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 17:33:27,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1438433768, now seen corresponding path program 8 times [2024-06-21 17:33:27,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:27,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901336513] [2024-06-21 17:33:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:28,604 INFO 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 17:33:28,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:28,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901336513] [2024-06-21 17:33:28,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901336513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:28,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:28,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:28,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707073241] [2024-06-21 17:33:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:28,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:28,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 361 transitions, 4440 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 17:33:28,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:28,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:28,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:30,123 INFO L124 PetriNetUnfolderBase]: 3606/5834 cut-off events. [2024-06-21 17:33:30,124 INFO L125 PetriNetUnfolderBase]: For 383199/383199 co-relation queries the response was YES. [2024-06-21 17:33:30,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47432 conditions, 5834 events. 3606/5834 cut-off events. For 383199/383199 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 36587 event pairs, 624 based on Foata normal form. 12/5835 useless extension candidates. Maximal degree in co-relation 47304. Up to 3699 conditions per place. [2024-06-21 17:33:30,198 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 250 selfloop transitions, 155 changer transitions 0/410 dead transitions. [2024-06-21 17:33:30,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 410 transitions, 5991 flow [2024-06-21 17:33:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 17:33:30,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 17:33:30,200 INFO L175 Difference]: Start difference. First operand has 269 places, 361 transitions, 4440 flow. Second operand 10 states and 195 transitions. [2024-06-21 17:33:30,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 410 transitions, 5991 flow [2024-06-21 17:33:30,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 410 transitions, 5796 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:30,762 INFO L231 Difference]: Finished difference. Result has 272 places, 370 transitions, 4958 flow [2024-06-21 17:33:30,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4245, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4958, PETRI_PLACES=272, PETRI_TRANSITIONS=370} [2024-06-21 17:33:30,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 17:33:30,763 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 370 transitions, 4958 flow [2024-06-21 17:33:30,764 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 17:33:30,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:30,764 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 17:33:30,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:33:30,764 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:30,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1538882340, now seen corresponding path program 9 times [2024-06-21 17:33:30,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:30,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665743797] [2024-06-21 17:33:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:30,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:31,686 INFO 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 17:33:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665743797] [2024-06-21 17:33:31,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665743797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:31,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:31,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:31,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50776765] [2024-06-21 17:33:31,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:31,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:31,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:31,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:31,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 370 transitions, 4958 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 17:33:31,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:31,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:31,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:33,108 INFO L124 PetriNetUnfolderBase]: 3708/6022 cut-off events. [2024-06-21 17:33:33,108 INFO L125 PetriNetUnfolderBase]: For 420220/420220 co-relation queries the response was YES. [2024-06-21 17:33:33,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50568 conditions, 6022 events. 3708/6022 cut-off events. For 420220/420220 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 38404 event pairs, 783 based on Foata normal form. 12/6028 useless extension candidates. Maximal degree in co-relation 50438. Up to 5021 conditions per place. [2024-06-21 17:33:33,187 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 290 selfloop transitions, 120 changer transitions 0/415 dead transitions. [2024-06-21 17:33:33,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 415 transitions, 6334 flow [2024-06-21 17:33:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 17:33:33,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722838137472284 [2024-06-21 17:33:33,189 INFO L175 Difference]: Start difference. First operand has 272 places, 370 transitions, 4958 flow. Second operand 11 states and 213 transitions. [2024-06-21 17:33:33,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 415 transitions, 6334 flow [2024-06-21 17:33:33,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 415 transitions, 6078 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 17:33:33,801 INFO L231 Difference]: Finished difference. Result has 277 places, 372 transitions, 5077 flow [2024-06-21 17:33:33,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5077, PETRI_PLACES=277, PETRI_TRANSITIONS=372} [2024-06-21 17:33:33,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-21 17:33:33,801 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 372 transitions, 5077 flow [2024-06-21 17:33:33,802 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 17:33:33,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:33,802 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 17:33:33,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:33:33,802 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:33,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:33,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1503547088, now seen corresponding path program 10 times [2024-06-21 17:33:33,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501493057] [2024-06-21 17:33:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:34,905 INFO 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 17:33:34,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:34,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501493057] [2024-06-21 17:33:34,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501493057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:34,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:34,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821755625] [2024-06-21 17:33:34,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:34,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:34,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:35,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:35,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 372 transitions, 5077 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 17:33:35,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:35,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:35,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:36,292 INFO L124 PetriNetUnfolderBase]: 3807/6191 cut-off events. [2024-06-21 17:33:36,292 INFO L125 PetriNetUnfolderBase]: For 453361/453361 co-relation queries the response was YES. [2024-06-21 17:33:36,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51922 conditions, 6191 events. 3807/6191 cut-off events. For 453361/453361 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 39829 event pairs, 823 based on Foata normal form. 28/6213 useless extension candidates. Maximal degree in co-relation 51790. Up to 5596 conditions per place. [2024-06-21 17:33:36,372 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 338 selfloop transitions, 65 changer transitions 0/408 dead transitions. [2024-06-21 17:33:36,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 408 transitions, 6146 flow [2024-06-21 17:33:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 17:33:36,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:33:36,374 INFO L175 Difference]: Start difference. First operand has 277 places, 372 transitions, 5077 flow. Second operand 10 states and 190 transitions. [2024-06-21 17:33:36,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 408 transitions, 6146 flow [2024-06-21 17:33:37,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 408 transitions, 5969 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:37,117 INFO L231 Difference]: Finished difference. Result has 280 places, 374 transitions, 5147 flow [2024-06-21 17:33:37,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4900, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5147, PETRI_PLACES=280, PETRI_TRANSITIONS=374} [2024-06-21 17:33:37,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 17:33:37,118 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 374 transitions, 5147 flow [2024-06-21 17:33:37,118 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 17:33:37,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:37,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:37,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:33:37,119 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:37,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash 617148990, now seen corresponding path program 11 times [2024-06-21 17:33:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:37,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504638918] [2024-06-21 17:33:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:37,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:38,152 INFO 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 17:33:38,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:38,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504638918] [2024-06-21 17:33:38,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504638918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:38,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:38,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497951015] [2024-06-21 17:33:38,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:38,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:38,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:38,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:38,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:38,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:38,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 374 transitions, 5147 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 17:33:38,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:38,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:38,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:39,562 INFO L124 PetriNetUnfolderBase]: 3779/6147 cut-off events. [2024-06-21 17:33:39,562 INFO L125 PetriNetUnfolderBase]: For 421265/421265 co-relation queries the response was YES. [2024-06-21 17:33:39,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50772 conditions, 6147 events. 3779/6147 cut-off events. For 421265/421265 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39492 event pairs, 807 based on Foata normal form. 16/6157 useless extension candidates. Maximal degree in co-relation 50638. Up to 5639 conditions per place. [2024-06-21 17:33:39,643 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 339 selfloop transitions, 64 changer transitions 0/408 dead transitions. [2024-06-21 17:33:39,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 408 transitions, 6113 flow [2024-06-21 17:33:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 17:33:39,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 17:33:39,644 INFO L175 Difference]: Start difference. First operand has 280 places, 374 transitions, 5147 flow. Second operand 10 states and 188 transitions. [2024-06-21 17:33:39,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 408 transitions, 6113 flow [2024-06-21 17:33:40,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 408 transitions, 5941 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:40,522 INFO L231 Difference]: Finished difference. Result has 282 places, 374 transitions, 5110 flow [2024-06-21 17:33:40,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5110, PETRI_PLACES=282, PETRI_TRANSITIONS=374} [2024-06-21 17:33:40,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 17:33:40,523 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 374 transitions, 5110 flow [2024-06-21 17:33:40,523 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 17:33:40,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:40,523 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 17:33:40,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:33:40,523 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:40,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1787310628, now seen corresponding path program 12 times [2024-06-21 17:33:40,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:40,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817714487] [2024-06-21 17:33:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:40,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:41,525 INFO 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 17:33:41,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817714487] [2024-06-21 17:33:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817714487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:41,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:41,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349687615] [2024-06-21 17:33:41,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:41,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:41,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:41,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:41,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 374 transitions, 5110 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 17:33:41,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:41,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:41,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:42,974 INFO L124 PetriNetUnfolderBase]: 3837/6241 cut-off events. [2024-06-21 17:33:42,975 INFO L125 PetriNetUnfolderBase]: For 432050/432050 co-relation queries the response was YES. [2024-06-21 17:33:43,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51502 conditions, 6241 events. 3837/6241 cut-off events. For 432050/432050 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 40252 event pairs, 817 based on Foata normal form. 16/6246 useless extension candidates. Maximal degree in co-relation 51367. Up to 5639 conditions per place. [2024-06-21 17:33:43,048 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 315 selfloop transitions, 89 changer transitions 0/409 dead transitions. [2024-06-21 17:33:43,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 409 transitions, 6129 flow [2024-06-21 17:33:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 17:33:43,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:33:43,049 INFO L175 Difference]: Start difference. First operand has 282 places, 374 transitions, 5110 flow. Second operand 10 states and 190 transitions. [2024-06-21 17:33:43,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 409 transitions, 6129 flow [2024-06-21 17:33:43,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 409 transitions, 5976 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:43,827 INFO L231 Difference]: Finished difference. Result has 284 places, 375 transitions, 5195 flow [2024-06-21 17:33:43,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5195, PETRI_PLACES=284, PETRI_TRANSITIONS=375} [2024-06-21 17:33:43,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 17:33:43,827 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 375 transitions, 5195 flow [2024-06-21 17:33:43,828 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 17:33:43,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:43,828 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 17:33:43,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:33:43,828 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:43,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1539149250, now seen corresponding path program 13 times [2024-06-21 17:33:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:43,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896158158] [2024-06-21 17:33:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:45,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:45,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896158158] [2024-06-21 17:33:45,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896158158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:45,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:45,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:45,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158438565] [2024-06-21 17:33:45,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:45,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:45,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:45,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:45,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:45,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 375 transitions, 5195 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 17:33:45,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:45,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:45,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:46,697 INFO L124 PetriNetUnfolderBase]: 3809/6201 cut-off events. [2024-06-21 17:33:46,697 INFO L125 PetriNetUnfolderBase]: For 414958/414958 co-relation queries the response was YES. [2024-06-21 17:33:46,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50300 conditions, 6201 events. 3809/6201 cut-off events. For 414958/414958 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 39980 event pairs, 796 based on Foata normal form. 16/6211 useless extension candidates. Maximal degree in co-relation 50164. Up to 5430 conditions per place. [2024-06-21 17:33:46,777 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 294 selfloop transitions, 118 changer transitions 0/417 dead transitions. [2024-06-21 17:33:46,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 417 transitions, 6207 flow [2024-06-21 17:33:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:33:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:33:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-21 17:33:46,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 17:33:46,779 INFO L175 Difference]: Start difference. First operand has 284 places, 375 transitions, 5195 flow. Second operand 12 states and 225 transitions. [2024-06-21 17:33:46,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 417 transitions, 6207 flow [2024-06-21 17:33:47,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 417 transitions, 5988 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:47,639 INFO L231 Difference]: Finished difference. Result has 288 places, 375 transitions, 5225 flow [2024-06-21 17:33:47,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4976, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5225, PETRI_PLACES=288, PETRI_TRANSITIONS=375} [2024-06-21 17:33:47,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 17:33:47,640 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 375 transitions, 5225 flow [2024-06-21 17:33:47,640 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 17:33:47,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:47,641 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 17:33:47,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:33:47,641 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:47,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:47,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2002032348, now seen corresponding path program 14 times [2024-06-21 17:33:47,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:47,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815992693] [2024-06-21 17:33:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:47,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:48,625 INFO 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 17:33:48,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:48,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815992693] [2024-06-21 17:33:48,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815992693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:48,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:48,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:48,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441935384] [2024-06-21 17:33:48,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:48,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:48,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:48,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:48,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 375 transitions, 5225 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 17:33:48,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:48,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:48,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:50,174 INFO L124 PetriNetUnfolderBase]: 4080/6648 cut-off events. [2024-06-21 17:33:50,174 INFO L125 PetriNetUnfolderBase]: For 402420/402420 co-relation queries the response was YES. [2024-06-21 17:33:50,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52972 conditions, 6648 events. 4080/6648 cut-off events. For 402420/402420 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 43488 event pairs, 803 based on Foata normal form. 12/6658 useless extension candidates. Maximal degree in co-relation 52835. Up to 5432 conditions per place. [2024-06-21 17:33:50,262 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 367 selfloop transitions, 86 changer transitions 0/458 dead transitions. [2024-06-21 17:33:50,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 458 transitions, 7047 flow [2024-06-21 17:33:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 17:33:50,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:33:50,263 INFO L175 Difference]: Start difference. First operand has 288 places, 375 transitions, 5225 flow. Second operand 11 states and 209 transitions. [2024-06-21 17:33:50,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 458 transitions, 7047 flow [2024-06-21 17:33:51,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 458 transitions, 6716 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 17:33:51,211 INFO L231 Difference]: Finished difference. Result has 292 places, 410 transitions, 5903 flow [2024-06-21 17:33:51,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5903, PETRI_PLACES=292, PETRI_TRANSITIONS=410} [2024-06-21 17:33:51,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-21 17:33:51,212 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 410 transitions, 5903 flow [2024-06-21 17:33:51,212 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 17:33:51,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:51,212 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 17:33:51,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:33:51,212 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:51,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash -986270204, now seen corresponding path program 1 times [2024-06-21 17:33:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:51,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673658144] [2024-06-21 17:33:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:51,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:51,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:51,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673658144] [2024-06-21 17:33:51,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673658144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:51,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:51,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:33:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766911883] [2024-06-21 17:33:51,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:51,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:33:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:33:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:33:52,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:52,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 410 transitions, 5903 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:52,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:52,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:52,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:53,326 INFO L124 PetriNetUnfolderBase]: 4085/6651 cut-off events. [2024-06-21 17:33:53,327 INFO L125 PetriNetUnfolderBase]: For 386032/386032 co-relation queries the response was YES. [2024-06-21 17:33:53,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53235 conditions, 6651 events. 4085/6651 cut-off events. For 386032/386032 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 43604 event pairs, 1194 based on Foata normal form. 1/6650 useless extension candidates. Maximal degree in co-relation 53093. Up to 6371 conditions per place. [2024-06-21 17:33:53,427 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 395 selfloop transitions, 37 changer transitions 0/437 dead transitions. [2024-06-21 17:33:53,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 437 transitions, 7097 flow [2024-06-21 17:33:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:33:53,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 17:33:53,429 INFO L175 Difference]: Start difference. First operand has 292 places, 410 transitions, 5903 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:33:53,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 437 transitions, 7097 flow [2024-06-21 17:33:54,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 437 transitions, 6879 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:33:54,258 INFO L231 Difference]: Finished difference. Result has 295 places, 416 transitions, 5908 flow [2024-06-21 17:33:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5908, PETRI_PLACES=295, PETRI_TRANSITIONS=416} [2024-06-21 17:33:54,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-21 17:33:54,258 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 416 transitions, 5908 flow [2024-06-21 17:33:54,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:54,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:54,259 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 17:33:54,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:33:54,259 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:54,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:54,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1968569607, now seen corresponding path program 1 times [2024-06-21 17:33:54,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:54,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657919896] [2024-06-21 17:33:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:54,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657919896] [2024-06-21 17:33:54,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657919896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:54,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:54,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:33:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127882650] [2024-06-21 17:33:54,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:54,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:33:54,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:33:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:33:54,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:54,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 416 transitions, 5908 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:54,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:54,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:54,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:56,319 INFO L124 PetriNetUnfolderBase]: 4211/6836 cut-off events. [2024-06-21 17:33:56,319 INFO L125 PetriNetUnfolderBase]: For 432441/432441 co-relation queries the response was YES. [2024-06-21 17:33:56,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55644 conditions, 6836 events. 4211/6836 cut-off events. For 432441/432441 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44829 event pairs, 832 based on Foata normal form. 6/6836 useless extension candidates. Maximal degree in co-relation 55502. Up to 5964 conditions per place. [2024-06-21 17:33:56,416 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 335 selfloop transitions, 115 changer transitions 0/455 dead transitions. [2024-06-21 17:33:56,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 455 transitions, 7552 flow [2024-06-21 17:33:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:33:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:33:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 17:33:56,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-21 17:33:56,418 INFO L175 Difference]: Start difference. First operand has 295 places, 416 transitions, 5908 flow. Second operand 8 states and 161 transitions. [2024-06-21 17:33:56,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 455 transitions, 7552 flow [2024-06-21 17:33:57,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 455 transitions, 7445 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:57,421 INFO L231 Difference]: Finished difference. Result has 299 places, 427 transitions, 6325 flow [2024-06-21 17:33:57,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6325, PETRI_PLACES=299, PETRI_TRANSITIONS=427} [2024-06-21 17:33:57,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-21 17:33:57,422 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 427 transitions, 6325 flow [2024-06-21 17:33:57,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:57,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:57,422 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 17:33:57,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:33:57,422 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:57,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1972288522, now seen corresponding path program 2 times [2024-06-21 17:33:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:57,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360857688] [2024-06-21 17:33:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:57,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:58,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:58,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360857688] [2024-06-21 17:33:58,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360857688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:58,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:58,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:33:58,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008235376] [2024-06-21 17:33:58,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:58,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:33:58,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:33:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:33:58,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:33:58,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 427 transitions, 6325 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:58,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:58,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:33:58,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:59,765 INFO L124 PetriNetUnfolderBase]: 4216/6841 cut-off events. [2024-06-21 17:33:59,766 INFO L125 PetriNetUnfolderBase]: For 441083/441083 co-relation queries the response was YES. [2024-06-21 17:33:59,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56977 conditions, 6841 events. 4216/6841 cut-off events. For 441083/441083 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44827 event pairs, 1209 based on Foata normal form. 1/6840 useless extension candidates. Maximal degree in co-relation 56832. Up to 6585 conditions per place. [2024-06-21 17:33:59,861 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 415 selfloop transitions, 23 changer transitions 0/443 dead transitions. [2024-06-21 17:33:59,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 443 transitions, 7305 flow [2024-06-21 17:33:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:33:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:33:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:33:59,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 17:33:59,862 INFO L175 Difference]: Start difference. First operand has 299 places, 427 transitions, 6325 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:33:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 443 transitions, 7305 flow [2024-06-21 17:34:00,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 443 transitions, 7127 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-21 17:34:00,931 INFO L231 Difference]: Finished difference. Result has 304 places, 430 transitions, 6269 flow [2024-06-21 17:34:00,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6269, PETRI_PLACES=304, PETRI_TRANSITIONS=430} [2024-06-21 17:34:00,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 17:34:00,932 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 430 transitions, 6269 flow [2024-06-21 17:34:00,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:00,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:00,933 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 17:34:00,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:34:00,933 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:00,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1972294257, now seen corresponding path program 2 times [2024-06-21 17:34:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:00,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990644611] [2024-06-21 17:34:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:00,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:01,650 INFO 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 17:34:01,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:01,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990644611] [2024-06-21 17:34:01,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990644611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:01,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:01,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:01,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411285679] [2024-06-21 17:34:01,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:01,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:01,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:01,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:01,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:01,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 430 transitions, 6269 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:01,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:01,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:01,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:03,346 INFO L124 PetriNetUnfolderBase]: 4342/7025 cut-off events. [2024-06-21 17:34:03,346 INFO L125 PetriNetUnfolderBase]: For 485947/485947 co-relation queries the response was YES. [2024-06-21 17:34:03,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59205 conditions, 7025 events. 4342/7025 cut-off events. For 485947/485947 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 46136 event pairs, 849 based on Foata normal form. 6/7024 useless extension candidates. Maximal degree in co-relation 59058. Up to 6375 conditions per place. [2024-06-21 17:34:03,440 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 377 selfloop transitions, 90 changer transitions 0/472 dead transitions. [2024-06-21 17:34:03,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 472 transitions, 7979 flow [2024-06-21 17:34:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 17:34:03,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-21 17:34:03,441 INFO L175 Difference]: Start difference. First operand has 304 places, 430 transitions, 6269 flow. Second operand 10 states and 191 transitions. [2024-06-21 17:34:03,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 472 transitions, 7979 flow [2024-06-21 17:34:04,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 472 transitions, 7885 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:04,512 INFO L231 Difference]: Finished difference. Result has 309 places, 442 transitions, 6655 flow [2024-06-21 17:34:04,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6175, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6655, PETRI_PLACES=309, PETRI_TRANSITIONS=442} [2024-06-21 17:34:04,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 17:34:04,515 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 442 transitions, 6655 flow [2024-06-21 17:34:04,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:04,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:04,515 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 17:34:04,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:34:04,515 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:04,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash -982460769, now seen corresponding path program 3 times [2024-06-21 17:34:04,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:04,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824870894] [2024-06-21 17:34:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:04,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:05,102 INFO 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 17:34:05,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:05,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824870894] [2024-06-21 17:34:05,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824870894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:05,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:05,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:05,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195646812] [2024-06-21 17:34:05,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:05,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:05,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:05,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:05,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 442 transitions, 6655 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:05,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:05,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:05,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:06,833 INFO L124 PetriNetUnfolderBase]: 4332/7015 cut-off events. [2024-06-21 17:34:06,834 INFO L125 PetriNetUnfolderBase]: For 488984/488984 co-relation queries the response was YES. [2024-06-21 17:34:06,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59417 conditions, 7015 events. 4332/7015 cut-off events. For 488984/488984 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 46005 event pairs, 844 based on Foata normal form. 6/7015 useless extension candidates. Maximal degree in co-relation 59268. Up to 6372 conditions per place. [2024-06-21 17:34:06,940 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 378 selfloop transitions, 83 changer transitions 0/466 dead transitions. [2024-06-21 17:34:06,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 466 transitions, 7903 flow [2024-06-21 17:34:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 17:34:06,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 17:34:06,942 INFO L175 Difference]: Start difference. First operand has 309 places, 442 transitions, 6655 flow. Second operand 8 states and 156 transitions. [2024-06-21 17:34:06,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 466 transitions, 7903 flow [2024-06-21 17:34:08,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 466 transitions, 7600 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:08,259 INFO L231 Difference]: Finished difference. Result has 311 places, 442 transitions, 6526 flow [2024-06-21 17:34:08,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6526, PETRI_PLACES=311, PETRI_TRANSITIONS=442} [2024-06-21 17:34:08,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-21 17:34:08,260 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 442 transitions, 6526 flow [2024-06-21 17:34:08,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:08,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:08,261 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 17:34:08,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:34:08,261 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:08,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash -324774701, now seen corresponding path program 4 times [2024-06-21 17:34:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393440048] [2024-06-21 17:34:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:08,895 INFO 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 17:34:08,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:08,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393440048] [2024-06-21 17:34:08,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393440048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:08,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:08,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:08,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048093519] [2024-06-21 17:34:08,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:08,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:08,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:08,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:08,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:08,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:08,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 442 transitions, 6526 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:08,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:08,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:08,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:10,508 INFO L124 PetriNetUnfolderBase]: 4410/7125 cut-off events. [2024-06-21 17:34:10,508 INFO L125 PetriNetUnfolderBase]: For 512571/512571 co-relation queries the response was YES. [2024-06-21 17:34:10,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60597 conditions, 7125 events. 4410/7125 cut-off events. For 512571/512571 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 46757 event pairs, 871 based on Foata normal form. 6/7125 useless extension candidates. Maximal degree in co-relation 60447. Up to 6386 conditions per place. [2024-06-21 17:34:10,596 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 367 selfloop transitions, 102 changer transitions 0/474 dead transitions. [2024-06-21 17:34:10,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 474 transitions, 8140 flow [2024-06-21 17:34:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 17:34:10,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 17:34:10,598 INFO L175 Difference]: Start difference. First operand has 311 places, 442 transitions, 6526 flow. Second operand 7 states and 140 transitions. [2024-06-21 17:34:10,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 474 transitions, 8140 flow [2024-06-21 17:34:11,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 474 transitions, 7974 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:34:11,584 INFO L231 Difference]: Finished difference. Result has 313 places, 451 transitions, 6894 flow [2024-06-21 17:34:11,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6360, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6894, PETRI_PLACES=313, PETRI_TRANSITIONS=451} [2024-06-21 17:34:11,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 17:34:11,584 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 451 transitions, 6894 flow [2024-06-21 17:34:11,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:11,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:11,585 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 17:34:11,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:34:11,585 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:11,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:11,585 INFO L85 PathProgramCache]: Analyzing trace with hash -324780281, now seen corresponding path program 5 times [2024-06-21 17:34:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712943431] [2024-06-21 17:34:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:11,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:12,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:12,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712943431] [2024-06-21 17:34:12,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712943431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:12,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:12,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:12,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035872847] [2024-06-21 17:34:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:12,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:12,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:12,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:12,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 451 transitions, 6894 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:12,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:12,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:12,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:13,869 INFO L124 PetriNetUnfolderBase]: 4400/7115 cut-off events. [2024-06-21 17:34:13,869 INFO L125 PetriNetUnfolderBase]: For 513415/513415 co-relation queries the response was YES. [2024-06-21 17:34:13,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60842 conditions, 7115 events. 4400/7115 cut-off events. For 513415/513415 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 46748 event pairs, 858 based on Foata normal form. 6/7115 useless extension candidates. Maximal degree in co-relation 60689. Up to 6383 conditions per place. [2024-06-21 17:34:13,957 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 361 selfloop transitions, 110 changer transitions 0/476 dead transitions. [2024-06-21 17:34:13,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 476 transitions, 8172 flow [2024-06-21 17:34:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 17:34:13,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-21 17:34:13,958 INFO L175 Difference]: Start difference. First operand has 313 places, 451 transitions, 6894 flow. Second operand 7 states and 142 transitions. [2024-06-21 17:34:13,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 476 transitions, 8172 flow [2024-06-21 17:34:15,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 476 transitions, 7875 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-21 17:34:15,061 INFO L231 Difference]: Finished difference. Result has 315 places, 451 transitions, 6825 flow [2024-06-21 17:34:15,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6825, PETRI_PLACES=315, PETRI_TRANSITIONS=451} [2024-06-21 17:34:15,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 17:34:15,062 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 451 transitions, 6825 flow [2024-06-21 17:34:15,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:15,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:15,062 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 17:34:15,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:34:15,063 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:15,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash -324780436, now seen corresponding path program 3 times [2024-06-21 17:34:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486565263] [2024-06-21 17:34:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:15,776 INFO 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 17:34:15,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:15,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486565263] [2024-06-21 17:34:15,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486565263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:15,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:15,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:15,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807894724] [2024-06-21 17:34:15,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:15,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:15,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:15,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:15,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 451 transitions, 6825 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:15,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:15,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:15,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:17,519 INFO L124 PetriNetUnfolderBase]: 4397/7107 cut-off events. [2024-06-21 17:34:17,520 INFO L125 PetriNetUnfolderBase]: For 508727/508727 co-relation queries the response was YES. [2024-06-21 17:34:17,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60382 conditions, 7107 events. 4397/7107 cut-off events. For 508727/508727 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 46696 event pairs, 1235 based on Foata normal form. 1/7106 useless extension candidates. Maximal degree in co-relation 60230. Up to 6824 conditions per place. [2024-06-21 17:34:17,607 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 26 changer transitions 0/469 dead transitions. [2024-06-21 17:34:17,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 469 transitions, 7815 flow [2024-06-21 17:34:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 17:34:17,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-21 17:34:17,609 INFO L175 Difference]: Start difference. First operand has 315 places, 451 transitions, 6825 flow. Second operand 7 states and 132 transitions. [2024-06-21 17:34:17,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 469 transitions, 7815 flow [2024-06-21 17:34:18,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 469 transitions, 7531 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:34:18,767 INFO L231 Difference]: Finished difference. Result has 317 places, 451 transitions, 6603 flow [2024-06-21 17:34:18,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6541, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6603, PETRI_PLACES=317, PETRI_TRANSITIONS=451} [2024-06-21 17:34:18,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-21 17:34:18,775 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 451 transitions, 6603 flow [2024-06-21 17:34:18,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:18,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:18,775 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 17:34:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:34:18,775 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:18,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash -317155924, now seen corresponding path program 1 times [2024-06-21 17:34:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:18,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652881933] [2024-06-21 17:34:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:19,480 INFO 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 17:34:19,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652881933] [2024-06-21 17:34:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652881933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:19,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981097319] [2024-06-21 17:34:19,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:19,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:19,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 451 transitions, 6603 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:19,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:19,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:19,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:21,051 INFO L124 PetriNetUnfolderBase]: 4409/7122 cut-off events. [2024-06-21 17:34:21,052 INFO L125 PetriNetUnfolderBase]: For 524958/524958 co-relation queries the response was YES. [2024-06-21 17:34:21,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60148 conditions, 7122 events. 4409/7122 cut-off events. For 524958/524958 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 46775 event pairs, 871 based on Foata normal form. 4/7115 useless extension candidates. Maximal degree in co-relation 59995. Up to 6712 conditions per place. [2024-06-21 17:34:21,314 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 49 changer transitions 0/466 dead transitions. [2024-06-21 17:34:21,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 466 transitions, 7691 flow [2024-06-21 17:34:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:34:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:34:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 17:34:21,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 17:34:21,316 INFO L175 Difference]: Start difference. First operand has 317 places, 451 transitions, 6603 flow. Second operand 6 states and 116 transitions. [2024-06-21 17:34:21,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 466 transitions, 7691 flow [2024-06-21 17:34:22,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 466 transitions, 7629 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:22,502 INFO L231 Difference]: Finished difference. Result has 317 places, 455 transitions, 6751 flow [2024-06-21 17:34:22,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6541, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6751, PETRI_PLACES=317, PETRI_TRANSITIONS=455} [2024-06-21 17:34:22,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-21 17:34:22,503 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 455 transitions, 6751 flow [2024-06-21 17:34:22,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:22,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:22,503 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 17:34:22,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:34:22,504 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:22,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash -317423051, now seen corresponding path program 6 times [2024-06-21 17:34:22,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:22,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452534839] [2024-06-21 17:34:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:22,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:23,060 INFO 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 17:34:23,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:23,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452534839] [2024-06-21 17:34:23,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452534839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:23,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:23,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:23,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141241458] [2024-06-21 17:34:23,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:23,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:23,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:23,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:23,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:23,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 455 transitions, 6751 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:23,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:23,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:23,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:24,658 INFO L124 PetriNetUnfolderBase]: 4423/7145 cut-off events. [2024-06-21 17:34:24,658 INFO L125 PetriNetUnfolderBase]: For 538477/538477 co-relation queries the response was YES. [2024-06-21 17:34:24,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61058 conditions, 7145 events. 4423/7145 cut-off events. For 538477/538477 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 46847 event pairs, 869 based on Foata normal form. 6/7145 useless extension candidates. Maximal degree in co-relation 60904. Up to 6806 conditions per place. [2024-06-21 17:34:24,768 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 436 selfloop transitions, 31 changer transitions 0/472 dead transitions. [2024-06-21 17:34:24,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 472 transitions, 7881 flow [2024-06-21 17:34:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:34:24,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 17:34:24,770 INFO L175 Difference]: Start difference. First operand has 317 places, 455 transitions, 6751 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:34:24,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 472 transitions, 7881 flow [2024-06-21 17:34:26,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 472 transitions, 7720 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 17:34:26,255 INFO L231 Difference]: Finished difference. Result has 319 places, 459 transitions, 6773 flow [2024-06-21 17:34:26,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6773, PETRI_PLACES=319, PETRI_TRANSITIONS=459} [2024-06-21 17:34:26,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 17:34:26,256 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 459 transitions, 6773 flow [2024-06-21 17:34:26,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:26,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:26,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:26,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:34:26,264 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:26,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash -916667766, now seen corresponding path program 1 times [2024-06-21 17:34:26,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:26,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944913321] [2024-06-21 17:34:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:26,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:27,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:27,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944913321] [2024-06-21 17:34:27,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944913321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:27,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:27,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:34:27,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402994396] [2024-06-21 17:34:27,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:27,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:34:27,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:27,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:34:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:34:27,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:27,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 459 transitions, 6773 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 17:34:27,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:27,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:27,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:29,110 INFO L124 PetriNetUnfolderBase]: 4464/7237 cut-off events. [2024-06-21 17:34:29,110 INFO L125 PetriNetUnfolderBase]: For 553968/553968 co-relation queries the response was YES. [2024-06-21 17:34:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61619 conditions, 7237 events. 4464/7237 cut-off events. For 553968/553968 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 47887 event pairs, 839 based on Foata normal form. 12/7247 useless extension candidates. Maximal degree in co-relation 61465. Up to 6624 conditions per place. [2024-06-21 17:34:29,223 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 64 changer transitions 0/497 dead transitions. [2024-06-21 17:34:29,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 497 transitions, 7961 flow [2024-06-21 17:34:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 17:34:29,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-21 17:34:29,224 INFO L175 Difference]: Start difference. First operand has 319 places, 459 transitions, 6773 flow. Second operand 10 states and 187 transitions. [2024-06-21 17:34:29,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 497 transitions, 7961 flow [2024-06-21 17:34:30,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 497 transitions, 7820 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 17:34:30,880 INFO L231 Difference]: Finished difference. Result has 324 places, 460 transitions, 6830 flow [2024-06-21 17:34:30,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6632, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6830, PETRI_PLACES=324, PETRI_TRANSITIONS=460} [2024-06-21 17:34:30,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 17:34:30,883 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 460 transitions, 6830 flow [2024-06-21 17:34:30,883 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 17:34:30,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:30,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:30,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:34:30,884 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:30,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:30,885 INFO L85 PathProgramCache]: Analyzing trace with hash -583834384, now seen corresponding path program 2 times [2024-06-21 17:34:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:30,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227666093] [2024-06-21 17:34:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:30,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:31,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:31,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227666093] [2024-06-21 17:34:31,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227666093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:31,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:31,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:34:31,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500337267] [2024-06-21 17:34:31,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:31,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:34:31,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:31,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:34:31,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:34:32,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:32,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 460 transitions, 6830 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 17:34:32,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:32,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:32,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:33,708 INFO L124 PetriNetUnfolderBase]: 4505/7299 cut-off events. [2024-06-21 17:34:33,709 INFO L125 PetriNetUnfolderBase]: For 570123/570123 co-relation queries the response was YES. [2024-06-21 17:34:33,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62369 conditions, 7299 events. 4505/7299 cut-off events. For 570123/570123 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 48186 event pairs, 845 based on Foata normal form. 12/7309 useless extension candidates. Maximal degree in co-relation 62214. Up to 6775 conditions per place. [2024-06-21 17:34:33,816 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 461 selfloop transitions, 35 changer transitions 0/501 dead transitions. [2024-06-21 17:34:33,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 501 transitions, 8036 flow [2024-06-21 17:34:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 17:34:33,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-21 17:34:33,817 INFO L175 Difference]: Start difference. First operand has 324 places, 460 transitions, 6830 flow. Second operand 10 states and 187 transitions. [2024-06-21 17:34:33,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 501 transitions, 8036 flow [2024-06-21 17:34:35,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 501 transitions, 7860 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 17:34:35,012 INFO L231 Difference]: Finished difference. Result has 326 places, 461 transitions, 6796 flow [2024-06-21 17:34:35,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6796, PETRI_PLACES=326, PETRI_TRANSITIONS=461} [2024-06-21 17:34:35,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-21 17:34:35,013 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 461 transitions, 6796 flow [2024-06-21 17:34:35,013 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 17:34:35,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:35,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:35,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:34:35,013 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:35,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:35,014 INFO L85 PathProgramCache]: Analyzing trace with hash 190128492, now seen corresponding path program 3 times [2024-06-21 17:34:35,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:35,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131463351] [2024-06-21 17:34:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:35,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:35,968 INFO 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 17:34:35,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:35,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131463351] [2024-06-21 17:34:35,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131463351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:35,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:35,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:34:35,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156365858] [2024-06-21 17:34:35,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:35,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:34:35,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:35,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:34:35,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:34:36,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:36,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 461 transitions, 6796 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 17:34:36,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:36,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:36,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:37,744 INFO L124 PetriNetUnfolderBase]: 4546/7370 cut-off events. [2024-06-21 17:34:37,744 INFO L125 PetriNetUnfolderBase]: For 583858/583858 co-relation queries the response was YES. [2024-06-21 17:34:37,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62820 conditions, 7370 events. 4546/7370 cut-off events. For 583858/583858 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 48861 event pairs, 877 based on Foata normal form. 12/7380 useless extension candidates. Maximal degree in co-relation 62664. Up to 6873 conditions per place. [2024-06-21 17:34:37,855 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 454 selfloop transitions, 42 changer transitions 0/501 dead transitions. [2024-06-21 17:34:37,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 501 transitions, 8002 flow [2024-06-21 17:34:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:34:37,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 17:34:37,857 INFO L175 Difference]: Start difference. First operand has 326 places, 461 transitions, 6796 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:34:37,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 501 transitions, 8002 flow [2024-06-21 17:34:39,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 501 transitions, 7888 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 17:34:39,163 INFO L231 Difference]: Finished difference. Result has 328 places, 462 transitions, 6840 flow [2024-06-21 17:34:39,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6682, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6840, PETRI_PLACES=328, PETRI_TRANSITIONS=462} [2024-06-21 17:34:39,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 17:34:39,163 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 462 transitions, 6840 flow [2024-06-21 17:34:39,163 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 17:34:39,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:39,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:34:39,164 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:39,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash -398238559, now seen corresponding path program 1 times [2024-06-21 17:34:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:39,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188532002] [2024-06-21 17:34:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:39,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:39,699 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 17:34:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188532002] [2024-06-21 17:34:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188532002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:39,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:39,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:39,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173538673] [2024-06-21 17:34:39,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:39,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:39,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:39,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:39,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:39,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:39,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 462 transitions, 6840 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:39,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:39,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:39,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:41,374 INFO L124 PetriNetUnfolderBase]: 4620/7471 cut-off events. [2024-06-21 17:34:41,374 INFO L125 PetriNetUnfolderBase]: For 598823/598823 co-relation queries the response was YES. [2024-06-21 17:34:41,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64590 conditions, 7471 events. 4620/7471 cut-off events. For 598823/598823 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 49517 event pairs, 914 based on Foata normal form. 2/7471 useless extension candidates. Maximal degree in co-relation 64433. Up to 6944 conditions per place. [2024-06-21 17:34:41,485 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 413 selfloop transitions, 80 changer transitions 0/498 dead transitions. [2024-06-21 17:34:41,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 498 transitions, 8389 flow [2024-06-21 17:34:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 17:34:41,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 17:34:41,486 INFO L175 Difference]: Start difference. First operand has 328 places, 462 transitions, 6840 flow. Second operand 8 states and 160 transitions. [2024-06-21 17:34:41,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 498 transitions, 8389 flow [2024-06-21 17:34:42,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 498 transitions, 8259 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 17:34:42,859 INFO L231 Difference]: Finished difference. Result has 329 places, 472 transitions, 7222 flow [2024-06-21 17:34:42,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6710, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7222, PETRI_PLACES=329, PETRI_TRANSITIONS=472} [2024-06-21 17:34:42,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-21 17:34:42,860 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 472 transitions, 7222 flow [2024-06-21 17:34:42,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:42,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:42,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:42,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:34:42,861 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:42,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:42,876 INFO L85 PathProgramCache]: Analyzing trace with hash -398118589, now seen corresponding path program 2 times [2024-06-21 17:34:42,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:42,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526297113] [2024-06-21 17:34:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:42,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:43,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526297113] [2024-06-21 17:34:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526297113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:43,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994188160] [2024-06-21 17:34:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:43,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:43,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:43,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 472 transitions, 7222 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:43,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:43,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:43,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:45,250 INFO L124 PetriNetUnfolderBase]: 4614/7487 cut-off events. [2024-06-21 17:34:45,250 INFO L125 PetriNetUnfolderBase]: For 601973/601973 co-relation queries the response was YES. [2024-06-21 17:34:45,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64603 conditions, 7487 events. 4614/7487 cut-off events. For 601973/601973 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 49753 event pairs, 939 based on Foata normal form. 2/7487 useless extension candidates. Maximal degree in co-relation 64444. Up to 7069 conditions per place. [2024-06-21 17:34:45,350 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 433 selfloop transitions, 55 changer transitions 0/493 dead transitions. [2024-06-21 17:34:45,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 493 transitions, 8299 flow [2024-06-21 17:34:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 17:34:45,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-21 17:34:45,351 INFO L175 Difference]: Start difference. First operand has 329 places, 472 transitions, 7222 flow. Second operand 8 states and 153 transitions. [2024-06-21 17:34:45,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 493 transitions, 8299 flow [2024-06-21 17:34:46,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 493 transitions, 8116 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 17:34:46,817 INFO L231 Difference]: Finished difference. Result has 332 places, 472 transitions, 7156 flow [2024-06-21 17:34:46,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7156, PETRI_PLACES=332, PETRI_TRANSITIONS=472} [2024-06-21 17:34:46,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-21 17:34:46,817 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 472 transitions, 7156 flow [2024-06-21 17:34:46,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:46,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:46,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:46,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:34:46,818 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:46,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:46,819 INFO L85 PathProgramCache]: Analyzing trace with hash 668549667, now seen corresponding path program 3 times [2024-06-21 17:34:46,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:46,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683934826] [2024-06-21 17:34:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:46,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:47,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683934826] [2024-06-21 17:34:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683934826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:47,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:47,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938087316] [2024-06-21 17:34:47,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:47,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:47,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:47,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:47,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:47,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:47,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 472 transitions, 7156 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:47,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:47,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:47,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:49,142 INFO L124 PetriNetUnfolderBase]: 4639/7504 cut-off events. [2024-06-21 17:34:49,142 INFO L125 PetriNetUnfolderBase]: For 613624/613624 co-relation queries the response was YES. [2024-06-21 17:34:49,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64920 conditions, 7504 events. 4639/7504 cut-off events. For 613624/613624 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 49763 event pairs, 923 based on Foata normal form. 2/7504 useless extension candidates. Maximal degree in co-relation 64760. Up to 7177 conditions per place. [2024-06-21 17:34:49,257 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 456 selfloop transitions, 39 changer transitions 0/500 dead transitions. [2024-06-21 17:34:49,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 500 transitions, 8447 flow [2024-06-21 17:34:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:34:49,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 17:34:49,259 INFO L175 Difference]: Start difference. First operand has 332 places, 472 transitions, 7156 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:34:49,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 500 transitions, 8447 flow [2024-06-21 17:34:50,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 500 transitions, 8312 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:34:50,896 INFO L231 Difference]: Finished difference. Result has 337 places, 483 transitions, 7353 flow [2024-06-21 17:34:50,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7353, PETRI_PLACES=337, PETRI_TRANSITIONS=483} [2024-06-21 17:34:50,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-21 17:34:50,897 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 483 transitions, 7353 flow [2024-06-21 17:34:50,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:50,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:50,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:50,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:34:50,898 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:50,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1951566410, now seen corresponding path program 4 times [2024-06-21 17:34:50,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:50,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851894437] [2024-06-21 17:34:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:50,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:52,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:52,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851894437] [2024-06-21 17:34:52,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851894437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:52,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:52,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:34:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201916662] [2024-06-21 17:34:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:34:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:34:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:34:52,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:52,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 483 transitions, 7353 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 17:34:52,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:52,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:52,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:53,864 INFO L124 PetriNetUnfolderBase]: 4619/7476 cut-off events. [2024-06-21 17:34:53,864 INFO L125 PetriNetUnfolderBase]: For 619536/619536 co-relation queries the response was YES. [2024-06-21 17:34:53,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63933 conditions, 7476 events. 4619/7476 cut-off events. For 619536/619536 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 49532 event pairs, 900 based on Foata normal form. 12/7477 useless extension candidates. Maximal degree in co-relation 63771. Up to 6825 conditions per place. [2024-06-21 17:34:53,979 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 422 selfloop transitions, 90 changer transitions 0/517 dead transitions. [2024-06-21 17:34:53,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 517 transitions, 8511 flow [2024-06-21 17:34:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 17:34:53,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 17:34:53,980 INFO L175 Difference]: Start difference. First operand has 337 places, 483 transitions, 7353 flow. Second operand 10 states and 188 transitions. [2024-06-21 17:34:53,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 517 transitions, 8511 flow [2024-06-21 17:34:55,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 517 transitions, 8372 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-21 17:34:55,693 INFO L231 Difference]: Finished difference. Result has 344 places, 483 transitions, 7400 flow [2024-06-21 17:34:55,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7214, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7400, PETRI_PLACES=344, PETRI_TRANSITIONS=483} [2024-06-21 17:34:55,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-21 17:34:55,694 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 483 transitions, 7400 flow [2024-06-21 17:34:55,694 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 17:34:55,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:55,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:55,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:34:55,695 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:55,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1946982440, now seen corresponding path program 5 times [2024-06-21 17:34:55,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:55,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830998176] [2024-06-21 17:34:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:55,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:56,768 INFO 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 17:34:56,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:56,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830998176] [2024-06-21 17:34:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830998176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:56,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:56,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:34:56,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304227102] [2024-06-21 17:34:56,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:34:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:34:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:34:56,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:34:56,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 483 transitions, 7400 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 17:34:56,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:56,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:34:56,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:58,675 INFO L124 PetriNetUnfolderBase]: 4599/7438 cut-off events. [2024-06-21 17:34:58,675 INFO L125 PetriNetUnfolderBase]: For 603358/603358 co-relation queries the response was YES. [2024-06-21 17:34:58,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62996 conditions, 7438 events. 4599/7438 cut-off events. For 603358/603358 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 49293 event pairs, 862 based on Foata normal form. 12/7443 useless extension candidates. Maximal degree in co-relation 62833. Up to 6796 conditions per place. [2024-06-21 17:34:58,785 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 430 selfloop transitions, 82 changer transitions 0/517 dead transitions. [2024-06-21 17:34:58,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 517 transitions, 8438 flow [2024-06-21 17:34:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 17:34:58,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-21 17:34:58,786 INFO L175 Difference]: Start difference. First operand has 344 places, 483 transitions, 7400 flow. Second operand 10 states and 187 transitions. [2024-06-21 17:34:58,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 517 transitions, 8438 flow [2024-06-21 17:35:00,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 517 transitions, 8224 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 17:35:00,469 INFO L231 Difference]: Finished difference. Result has 344 places, 482 transitions, 7232 flow [2024-06-21 17:35:00,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7064, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7232, PETRI_PLACES=344, PETRI_TRANSITIONS=482} [2024-06-21 17:35:00,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-21 17:35:00,470 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 482 transitions, 7232 flow [2024-06-21 17:35:00,471 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 17:35:00,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:00,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:00,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:35:00,471 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:00,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:00,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1543517471, now seen corresponding path program 4 times [2024-06-21 17:35:00,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:00,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890924930] [2024-06-21 17:35:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:00,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:01,221 INFO 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 17:35:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890924930] [2024-06-21 17:35:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890924930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:01,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:01,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:01,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71161974] [2024-06-21 17:35:01,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:01,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:01,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:01,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:01,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 482 transitions, 7232 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:01,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:01,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:01,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:02,965 INFO L124 PetriNetUnfolderBase]: 4705/7590 cut-off events. [2024-06-21 17:35:02,966 INFO L125 PetriNetUnfolderBase]: For 635471/635471 co-relation queries the response was YES. [2024-06-21 17:35:03,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65709 conditions, 7590 events. 4705/7590 cut-off events. For 635471/635471 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 50278 event pairs, 875 based on Foata normal form. 2/7585 useless extension candidates. Maximal degree in co-relation 65545. Up to 6410 conditions per place. [2024-06-21 17:35:03,083 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 369 selfloop transitions, 148 changer transitions 0/522 dead transitions. [2024-06-21 17:35:03,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 522 transitions, 9239 flow [2024-06-21 17:35:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 17:35:03,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-21 17:35:03,085 INFO L175 Difference]: Start difference. First operand has 344 places, 482 transitions, 7232 flow. Second operand 8 states and 163 transitions. [2024-06-21 17:35:03,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 522 transitions, 9239 flow [2024-06-21 17:35:04,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 522 transitions, 8829 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-21 17:35:04,941 INFO L231 Difference]: Finished difference. Result has 341 places, 493 transitions, 7433 flow [2024-06-21 17:35:04,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6822, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7433, PETRI_PLACES=341, PETRI_TRANSITIONS=493} [2024-06-21 17:35:04,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-21 17:35:04,942 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 493 transitions, 7433 flow [2024-06-21 17:35:04,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:04,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:04,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:04,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:35:04,943 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:04,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 627341635, now seen corresponding path program 5 times [2024-06-21 17:35:04,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:04,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452428656] [2024-06-21 17:35:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:05,623 INFO 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 17:35:05,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:05,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452428656] [2024-06-21 17:35:05,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452428656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:05,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:05,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:05,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272786232] [2024-06-21 17:35:05,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:05,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:05,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:05,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:05,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:05,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 493 transitions, 7433 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:05,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:05,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:05,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:07,423 INFO L124 PetriNetUnfolderBase]: 4725/7634 cut-off events. [2024-06-21 17:35:07,423 INFO L125 PetriNetUnfolderBase]: For 645523/645523 co-relation queries the response was YES. [2024-06-21 17:35:07,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65402 conditions, 7634 events. 4725/7634 cut-off events. For 645523/645523 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 50675 event pairs, 869 based on Foata normal form. 2/7629 useless extension candidates. Maximal degree in co-relation 65240. Up to 7036 conditions per place. [2024-06-21 17:35:07,537 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 431 selfloop transitions, 86 changer transitions 0/522 dead transitions. [2024-06-21 17:35:07,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 522 transitions, 8744 flow [2024-06-21 17:35:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:35:07,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:35:07,552 INFO L175 Difference]: Start difference. First operand has 341 places, 493 transitions, 7433 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:35:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 522 transitions, 8744 flow [2024-06-21 17:35:09,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 522 transitions, 8332 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:09,462 INFO L231 Difference]: Finished difference. Result has 344 places, 501 transitions, 7356 flow [2024-06-21 17:35:09,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7356, PETRI_PLACES=344, PETRI_TRANSITIONS=501} [2024-06-21 17:35:09,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-21 17:35:09,463 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 501 transitions, 7356 flow [2024-06-21 17:35:09,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:09,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:09,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:09,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:35:09,464 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:09,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash 883722175, now seen corresponding path program 6 times [2024-06-21 17:35:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:09,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236133731] [2024-06-21 17:35:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:10,076 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 17:35:10,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:10,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236133731] [2024-06-21 17:35:10,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236133731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:10,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:10,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:10,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844460463] [2024-06-21 17:35:10,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:10,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:10,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:10,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:10,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:10,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 501 transitions, 7356 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:10,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:10,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:10,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:11,980 INFO L124 PetriNetUnfolderBase]: 4735/7644 cut-off events. [2024-06-21 17:35:11,980 INFO L125 PetriNetUnfolderBase]: For 654722/654722 co-relation queries the response was YES. [2024-06-21 17:35:12,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64825 conditions, 7644 events. 4735/7644 cut-off events. For 654722/654722 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 50725 event pairs, 858 based on Foata normal form. 2/7639 useless extension candidates. Maximal degree in co-relation 64663. Up to 6424 conditions per place. [2024-06-21 17:35:12,081 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 367 selfloop transitions, 160 changer transitions 0/532 dead transitions. [2024-06-21 17:35:12,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 532 transitions, 9007 flow [2024-06-21 17:35:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 17:35:12,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-21 17:35:12,083 INFO L175 Difference]: Start difference. First operand has 344 places, 501 transitions, 7356 flow. Second operand 8 states and 161 transitions. [2024-06-21 17:35:12,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 532 transitions, 9007 flow [2024-06-21 17:35:13,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 532 transitions, 8814 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:35:13,701 INFO L231 Difference]: Finished difference. Result has 348 places, 504 transitions, 7575 flow [2024-06-21 17:35:13,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7575, PETRI_PLACES=348, PETRI_TRANSITIONS=504} [2024-06-21 17:35:13,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-21 17:35:13,701 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 504 transitions, 7575 flow [2024-06-21 17:35:13,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:13,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:13,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:13,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:35:13,702 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:13,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash 896102335, now seen corresponding path program 7 times [2024-06-21 17:35:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:13,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792710900] [2024-06-21 17:35:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:14,299 INFO 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 17:35:14,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:14,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792710900] [2024-06-21 17:35:14,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792710900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:14,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:14,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:14,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902683076] [2024-06-21 17:35:14,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:14,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:14,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:14,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:14,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:14,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:14,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 504 transitions, 7575 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:14,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:14,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:14,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:16,040 INFO L124 PetriNetUnfolderBase]: 4709/7600 cut-off events. [2024-06-21 17:35:16,040 INFO L125 PetriNetUnfolderBase]: For 661997/661997 co-relation queries the response was YES. [2024-06-21 17:35:16,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64618 conditions, 7600 events. 4709/7600 cut-off events. For 661997/661997 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 50344 event pairs, 855 based on Foata normal form. 6/7599 useless extension candidates. Maximal degree in co-relation 64455. Up to 6405 conditions per place. [2024-06-21 17:35:16,160 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 362 selfloop transitions, 162 changer transitions 0/529 dead transitions. [2024-06-21 17:35:16,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 529 transitions, 8971 flow [2024-06-21 17:35:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 17:35:16,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-21 17:35:16,162 INFO L175 Difference]: Start difference. First operand has 348 places, 504 transitions, 7575 flow. Second operand 8 states and 159 transitions. [2024-06-21 17:35:16,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 529 transitions, 8971 flow [2024-06-21 17:35:18,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 529 transitions, 8501 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 17:35:18,109 INFO L231 Difference]: Finished difference. Result has 350 places, 504 transitions, 7437 flow [2024-06-21 17:35:18,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7105, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7437, PETRI_PLACES=350, PETRI_TRANSITIONS=504} [2024-06-21 17:35:18,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-21 17:35:18,110 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 504 transitions, 7437 flow [2024-06-21 17:35:18,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:18,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:18,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:18,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:35:18,111 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:18,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash -391526105, now seen corresponding path program 8 times [2024-06-21 17:35:18,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:18,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21076698] [2024-06-21 17:35:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:18,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:18,791 INFO 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 17:35:18,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:18,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21076698] [2024-06-21 17:35:18,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21076698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:18,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:18,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:18,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295906253] [2024-06-21 17:35:18,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:18,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:18,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:18,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:18,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:18,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 504 transitions, 7437 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:18,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:18,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:18,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:20,501 INFO L124 PetriNetUnfolderBase]: 4691/7596 cut-off events. [2024-06-21 17:35:20,501 INFO L125 PetriNetUnfolderBase]: For 652223/652223 co-relation queries the response was YES. [2024-06-21 17:35:20,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63714 conditions, 7596 events. 4691/7596 cut-off events. For 652223/652223 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 50580 event pairs, 865 based on Foata normal form. 6/7595 useless extension candidates. Maximal degree in co-relation 63550. Up to 6846 conditions per place. [2024-06-21 17:35:20,614 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 424 selfloop transitions, 99 changer transitions 0/528 dead transitions. [2024-06-21 17:35:20,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 528 transitions, 8843 flow [2024-06-21 17:35:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:35:20,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-21 17:35:20,615 INFO L175 Difference]: Start difference. First operand has 350 places, 504 transitions, 7437 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:35:20,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 528 transitions, 8843 flow [2024-06-21 17:35:22,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 528 transitions, 8488 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:35:22,404 INFO L231 Difference]: Finished difference. Result has 351 places, 504 transitions, 7289 flow [2024-06-21 17:35:22,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7289, PETRI_PLACES=351, PETRI_TRANSITIONS=504} [2024-06-21 17:35:22,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-21 17:35:22,405 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 504 transitions, 7289 flow [2024-06-21 17:35:22,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:22,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:22,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:22,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:35:22,406 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:22,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash -391793015, now seen corresponding path program 9 times [2024-06-21 17:35:22,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:22,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697821029] [2024-06-21 17:35:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:22,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:23,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697821029] [2024-06-21 17:35:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697821029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:23,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:23,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:23,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038455486] [2024-06-21 17:35:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:23,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:23,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:23,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:23,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:23,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 504 transitions, 7289 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:23,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:23,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:25,017 INFO L124 PetriNetUnfolderBase]: 4665/7566 cut-off events. [2024-06-21 17:35:25,017 INFO L125 PetriNetUnfolderBase]: For 642252/642252 co-relation queries the response was YES. [2024-06-21 17:35:25,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62632 conditions, 7566 events. 4665/7566 cut-off events. For 642252/642252 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 50442 event pairs, 861 based on Foata normal form. 6/7565 useless extension candidates. Maximal degree in co-relation 62467. Up to 6827 conditions per place. [2024-06-21 17:35:25,129 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 424 selfloop transitions, 104 changer transitions 0/533 dead transitions. [2024-06-21 17:35:25,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 533 transitions, 8594 flow [2024-06-21 17:35:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:35:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:35:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 17:35:25,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 17:35:25,130 INFO L175 Difference]: Start difference. First operand has 351 places, 504 transitions, 7289 flow. Second operand 10 states and 188 transitions. [2024-06-21 17:35:25,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 533 transitions, 8594 flow [2024-06-21 17:35:27,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 533 transitions, 8305 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:27,286 INFO L231 Difference]: Finished difference. Result has 356 places, 504 transitions, 7216 flow [2024-06-21 17:35:27,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7000, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7216, PETRI_PLACES=356, PETRI_TRANSITIONS=504} [2024-06-21 17:35:27,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-21 17:35:27,287 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 504 transitions, 7216 flow [2024-06-21 17:35:27,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:27,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:27,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:27,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:35:27,288 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:27,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1478534367, now seen corresponding path program 10 times [2024-06-21 17:35:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:27,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377014100] [2024-06-21 17:35:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:27,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:27,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377014100] [2024-06-21 17:35:27,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377014100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:27,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:27,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:27,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626648011] [2024-06-21 17:35:27,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:27,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:27,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:27,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:27,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 504 transitions, 7216 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:27,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:27,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:27,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:29,542 INFO L124 PetriNetUnfolderBase]: 4647/7542 cut-off events. [2024-06-21 17:35:29,542 INFO L125 PetriNetUnfolderBase]: For 629822/629822 co-relation queries the response was YES. [2024-06-21 17:35:29,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61667 conditions, 7542 events. 4647/7542 cut-off events. For 629822/629822 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 50305 event pairs, 895 based on Foata normal form. 6/7541 useless extension candidates. Maximal degree in co-relation 61501. Up to 6677 conditions per place. [2024-06-21 17:35:29,664 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 405 selfloop transitions, 122 changer transitions 0/532 dead transitions. [2024-06-21 17:35:29,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 532 transitions, 8798 flow [2024-06-21 17:35:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:35:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:35:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 17:35:29,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 17:35:29,665 INFO L175 Difference]: Start difference. First operand has 356 places, 504 transitions, 7216 flow. Second operand 7 states and 147 transitions. [2024-06-21 17:35:29,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 532 transitions, 8798 flow [2024-06-21 17:35:31,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 532 transitions, 8451 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-21 17:35:31,609 INFO L231 Difference]: Finished difference. Result has 353 places, 504 transitions, 7131 flow [2024-06-21 17:35:31,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6869, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7131, PETRI_PLACES=353, PETRI_TRANSITIONS=504} [2024-06-21 17:35:31,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-21 17:35:31,610 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 504 transitions, 7131 flow [2024-06-21 17:35:31,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:31,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:31,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:31,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:35:31,610 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:31,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1956636017, now seen corresponding path program 11 times [2024-06-21 17:35:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:31,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581899585] [2024-06-21 17:35:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:31,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:32,156 INFO 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 17:35:32,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:32,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581899585] [2024-06-21 17:35:32,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581899585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:32,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:32,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:32,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683590236] [2024-06-21 17:35:32,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:32,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:32,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:32,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:32,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 504 transitions, 7131 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:32,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:32,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:32,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:33,881 INFO L124 PetriNetUnfolderBase]: 4629/7510 cut-off events. [2024-06-21 17:35:33,882 INFO L125 PetriNetUnfolderBase]: For 618217/618217 co-relation queries the response was YES. [2024-06-21 17:35:33,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60833 conditions, 7510 events. 4629/7510 cut-off events. For 618217/618217 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 50042 event pairs, 873 based on Foata normal form. 6/7509 useless extension candidates. Maximal degree in co-relation 60666. Up to 6666 conditions per place. [2024-06-21 17:35:33,997 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 397 selfloop transitions, 129 changer transitions 0/531 dead transitions. [2024-06-21 17:35:33,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 531 transitions, 8539 flow [2024-06-21 17:35:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:35:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:35:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 17:35:33,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-21 17:35:33,999 INFO L175 Difference]: Start difference. First operand has 353 places, 504 transitions, 7131 flow. Second operand 7 states and 145 transitions. [2024-06-21 17:35:33,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 531 transitions, 8539 flow [2024-06-21 17:35:35,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 531 transitions, 8313 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:35,930 INFO L231 Difference]: Finished difference. Result has 355 places, 504 transitions, 7181 flow [2024-06-21 17:35:35,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6907, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7181, PETRI_PLACES=355, PETRI_TRANSITIONS=504} [2024-06-21 17:35:35,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-21 17:35:35,931 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 504 transitions, 7181 flow [2024-06-21 17:35:35,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:35,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:35,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:35,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:35:35,931 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:35,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1685187807, now seen corresponding path program 12 times [2024-06-21 17:35:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:35,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907793126] [2024-06-21 17:35:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:35,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:36,462 INFO 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 17:35:36,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:36,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907793126] [2024-06-21 17:35:36,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907793126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:36,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:36,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:36,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834653281] [2024-06-21 17:35:36,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:36,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:36,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:36,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:36,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:36,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:36,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 504 transitions, 7181 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:36,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:36,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:36,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:38,223 INFO L124 PetriNetUnfolderBase]: 4603/7486 cut-off events. [2024-06-21 17:35:38,223 INFO L125 PetriNetUnfolderBase]: For 595457/595457 co-relation queries the response was YES. [2024-06-21 17:35:38,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59853 conditions, 7486 events. 4603/7486 cut-off events. For 595457/595457 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 49944 event pairs, 889 based on Foata normal form. 6/7490 useless extension candidates. Maximal degree in co-relation 59686. Up to 6958 conditions per place. [2024-06-21 17:35:38,337 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 437 selfloop transitions, 86 changer transitions 0/528 dead transitions. [2024-06-21 17:35:38,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 528 transitions, 8350 flow [2024-06-21 17:35:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:35:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:35:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 17:35:38,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-21 17:35:38,339 INFO L175 Difference]: Start difference. First operand has 355 places, 504 transitions, 7181 flow. Second operand 7 states and 143 transitions. [2024-06-21 17:35:38,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 528 transitions, 8350 flow [2024-06-21 17:35:40,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 528 transitions, 8083 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 17:35:40,277 INFO L231 Difference]: Finished difference. Result has 356 places, 504 transitions, 7129 flow [2024-06-21 17:35:40,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7129, PETRI_PLACES=356, PETRI_TRANSITIONS=504} [2024-06-21 17:35:40,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-21 17:35:40,277 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 504 transitions, 7129 flow [2024-06-21 17:35:40,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:40,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:40,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:40,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:35:40,278 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:40,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:40,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1256844873, now seen corresponding path program 1 times [2024-06-21 17:35:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:40,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093611627] [2024-06-21 17:35:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:40,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093611627] [2024-06-21 17:35:40,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093611627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:40,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:40,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465586163] [2024-06-21 17:35:40,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:40,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:40,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:40,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:41,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:41,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 504 transitions, 7129 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:41,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:41,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:41,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:42,902 INFO L124 PetriNetUnfolderBase]: 4631/7512 cut-off events. [2024-06-21 17:35:42,902 INFO L125 PetriNetUnfolderBase]: For 599399/599399 co-relation queries the response was YES. [2024-06-21 17:35:42,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59800 conditions, 7512 events. 4631/7512 cut-off events. For 599399/599399 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 49931 event pairs, 835 based on Foata normal form. 8/7518 useless extension candidates. Maximal degree in co-relation 59633. Up to 6922 conditions per place. [2024-06-21 17:35:43,001 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 469 selfloop transitions, 53 changer transitions 0/527 dead transitions. [2024-06-21 17:35:43,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 527 transitions, 8329 flow [2024-06-21 17:35:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:35:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:35:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 17:35:43,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-21 17:35:43,002 INFO L175 Difference]: Start difference. First operand has 356 places, 504 transitions, 7129 flow. Second operand 6 states and 128 transitions. [2024-06-21 17:35:43,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 527 transitions, 8329 flow [2024-06-21 17:35:44,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 527 transitions, 7812 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 17:35:44,619 INFO L231 Difference]: Finished difference. Result has 352 places, 505 transitions, 6749 flow [2024-06-21 17:35:44,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6749, PETRI_PLACES=352, PETRI_TRANSITIONS=505} [2024-06-21 17:35:44,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-21 17:35:44,620 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 505 transitions, 6749 flow [2024-06-21 17:35:44,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:44,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:44,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:44,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:35:44,620 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:44,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1241607753, now seen corresponding path program 2 times [2024-06-21 17:35:44,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:44,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931291441] [2024-06-21 17:35:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:44,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:45,286 INFO 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 17:35:45,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:45,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931291441] [2024-06-21 17:35:45,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931291441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:45,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:45,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:45,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798218892] [2024-06-21 17:35:45,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:45,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:45,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:45,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:45,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 505 transitions, 6749 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:45,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:45,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:45,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:46,991 INFO L124 PetriNetUnfolderBase]: 4633/7518 cut-off events. [2024-06-21 17:35:46,991 INFO L125 PetriNetUnfolderBase]: For 580963/580963 co-relation queries the response was YES. [2024-06-21 17:35:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59201 conditions, 7518 events. 4633/7518 cut-off events. For 580963/580963 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 49992 event pairs, 857 based on Foata normal form. 8/7515 useless extension candidates. Maximal degree in co-relation 59033. Up to 6782 conditions per place. [2024-06-21 17:35:47,104 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 479 selfloop transitions, 45 changer transitions 0/529 dead transitions. [2024-06-21 17:35:47,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 529 transitions, 8183 flow [2024-06-21 17:35:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:35:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:35:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 17:35:47,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-21 17:35:47,105 INFO L175 Difference]: Start difference. First operand has 352 places, 505 transitions, 6749 flow. Second operand 6 states and 121 transitions. [2024-06-21 17:35:47,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 529 transitions, 8183 flow [2024-06-21 17:35:48,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 529 transitions, 8090 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:35:48,792 INFO L231 Difference]: Finished difference. Result has 354 places, 506 transitions, 6762 flow [2024-06-21 17:35:48,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6656, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6762, PETRI_PLACES=354, PETRI_TRANSITIONS=506} [2024-06-21 17:35:48,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-21 17:35:48,793 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 506 transitions, 6762 flow [2024-06-21 17:35:48,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:48,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:48,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:48,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:35:48,793 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:48,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash -509664315, now seen corresponding path program 1 times [2024-06-21 17:35:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2377449] [2024-06-21 17:35:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:49,753 INFO 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 17:35:49,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:49,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2377449] [2024-06-21 17:35:49,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2377449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:49,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:49,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:35:49,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843404822] [2024-06-21 17:35:49,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:49,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:35:49,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:35:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:35:49,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:49,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 506 transitions, 6762 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:49,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:49,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:49,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:51,505 INFO L124 PetriNetUnfolderBase]: 4641/7531 cut-off events. [2024-06-21 17:35:51,506 INFO L125 PetriNetUnfolderBase]: For 572730/572730 co-relation queries the response was YES. [2024-06-21 17:35:51,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59530 conditions, 7531 events. 4641/7531 cut-off events. For 572730/572730 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 50251 event pairs, 1223 based on Foata normal form. 2/7531 useless extension candidates. Maximal degree in co-relation 59361. Up to 7153 conditions per place. [2024-06-21 17:35:51,625 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 487 selfloop transitions, 44 changer transitions 0/536 dead transitions. [2024-06-21 17:35:51,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 536 transitions, 8216 flow [2024-06-21 17:35:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:35:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:35:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:35:51,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:35:51,626 INFO L175 Difference]: Start difference. First operand has 354 places, 506 transitions, 6762 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:35:51,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 536 transitions, 8216 flow [2024-06-21 17:35:53,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 536 transitions, 8142 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:35:53,506 INFO L231 Difference]: Finished difference. Result has 360 places, 510 transitions, 6917 flow [2024-06-21 17:35:53,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6917, PETRI_PLACES=360, PETRI_TRANSITIONS=510} [2024-06-21 17:35:53,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-21 17:35:53,507 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 510 transitions, 6917 flow [2024-06-21 17:35:53,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:53,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:53,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:53,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:35:53,507 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:53,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash 893315745, now seen corresponding path program 2 times [2024-06-21 17:35:53,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:53,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126125417] [2024-06-21 17:35:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:54,409 INFO 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 17:35:54,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126125417] [2024-06-21 17:35:54,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126125417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:54,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:54,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:35:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679276673] [2024-06-21 17:35:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:54,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:35:54,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:35:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:35:54,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:54,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 510 transitions, 6917 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:54,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:54,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:56,213 INFO L124 PetriNetUnfolderBase]: 4649/7548 cut-off events. [2024-06-21 17:35:56,213 INFO L125 PetriNetUnfolderBase]: For 584521/584521 co-relation queries the response was YES. [2024-06-21 17:35:56,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59769 conditions, 7548 events. 4649/7548 cut-off events. For 584521/584521 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 50414 event pairs, 1257 based on Foata normal form. 2/7548 useless extension candidates. Maximal degree in co-relation 59599. Up to 7198 conditions per place. [2024-06-21 17:35:56,325 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 487 selfloop transitions, 42 changer transitions 0/534 dead transitions. [2024-06-21 17:35:56,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 534 transitions, 8115 flow [2024-06-21 17:35:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:35:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:35:56,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:35:56,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-21 17:35:56,327 INFO L175 Difference]: Start difference. First operand has 360 places, 510 transitions, 6917 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:35:56,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 534 transitions, 8115 flow [2024-06-21 17:35:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 534 transitions, 7965 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:58,311 INFO L231 Difference]: Finished difference. Result has 365 places, 512 transitions, 6930 flow [2024-06-21 17:35:58,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6930, PETRI_PLACES=365, PETRI_TRANSITIONS=512} [2024-06-21 17:35:58,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-21 17:35:58,312 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 512 transitions, 6930 flow [2024-06-21 17:35:58,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:58,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:58,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:58,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:35:58,312 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:58,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash 893315869, now seen corresponding path program 1 times [2024-06-21 17:35:58,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:58,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108478903] [2024-06-21 17:35:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:58,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:59,117 INFO 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 17:35:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:59,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108478903] [2024-06-21 17:35:59,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108478903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:59,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:59,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:35:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825082129] [2024-06-21 17:35:59,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:59,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:35:59,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:59,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:35:59,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:35:59,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:35:59,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 512 transitions, 6930 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:59,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:59,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:35:59,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:01,047 INFO L124 PetriNetUnfolderBase]: 4702/7622 cut-off events. [2024-06-21 17:36:01,048 INFO L125 PetriNetUnfolderBase]: For 619557/619557 co-relation queries the response was YES. [2024-06-21 17:36:01,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60758 conditions, 7622 events. 4702/7622 cut-off events. For 619557/619557 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 50780 event pairs, 848 based on Foata normal form. 4/7620 useless extension candidates. Maximal degree in co-relation 60586. Up to 6595 conditions per place. [2024-06-21 17:36:01,146 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 477 selfloop transitions, 135 changer transitions 0/617 dead transitions. [2024-06-21 17:36:01,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 617 transitions, 9912 flow [2024-06-21 17:36:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 17:36:01,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 17:36:01,148 INFO L175 Difference]: Start difference. First operand has 365 places, 512 transitions, 6930 flow. Second operand 9 states and 180 transitions. [2024-06-21 17:36:01,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 617 transitions, 9912 flow [2024-06-21 17:36:02,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 617 transitions, 9784 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 17:36:02,634 INFO L231 Difference]: Finished difference. Result has 370 places, 572 transitions, 8016 flow [2024-06-21 17:36:02,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6807, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8016, PETRI_PLACES=370, PETRI_TRANSITIONS=572} [2024-06-21 17:36:02,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-21 17:36:02,635 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 572 transitions, 8016 flow [2024-06-21 17:36:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:02,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:02,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:02,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:36:02,636 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:02,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash 896112379, now seen corresponding path program 2 times [2024-06-21 17:36:02,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:02,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210344797] [2024-06-21 17:36:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:02,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:03,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:03,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210344797] [2024-06-21 17:36:03,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210344797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:03,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:03,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:03,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139135328] [2024-06-21 17:36:03,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:03,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:03,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:03,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:03,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:03,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:03,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 572 transitions, 8016 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:03,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:03,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:03,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:05,277 INFO L124 PetriNetUnfolderBase]: 4766/7711 cut-off events. [2024-06-21 17:36:05,277 INFO L125 PetriNetUnfolderBase]: For 661400/661400 co-relation queries the response was YES. [2024-06-21 17:36:05,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64196 conditions, 7711 events. 4766/7711 cut-off events. For 661400/661400 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 51444 event pairs, 851 based on Foata normal form. 4/7708 useless extension candidates. Maximal degree in co-relation 64019. Up to 6870 conditions per place. [2024-06-21 17:36:05,405 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 118 changer transitions 0/621 dead transitions. [2024-06-21 17:36:05,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 621 transitions, 10314 flow [2024-06-21 17:36:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 17:36:05,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-21 17:36:05,408 INFO L175 Difference]: Start difference. First operand has 370 places, 572 transitions, 8016 flow. Second operand 9 states and 175 transitions. [2024-06-21 17:36:05,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 621 transitions, 10314 flow [2024-06-21 17:36:07,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 621 transitions, 10128 flow, removed 92 selfloop flow, removed 1 redundant places. [2024-06-21 17:36:07,557 INFO L231 Difference]: Finished difference. Result has 379 places, 581 transitions, 8322 flow [2024-06-21 17:36:07,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7860, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8322, PETRI_PLACES=379, PETRI_TRANSITIONS=581} [2024-06-21 17:36:07,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-21 17:36:07,558 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 581 transitions, 8322 flow [2024-06-21 17:36:07,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:07,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:07,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:07,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:36:07,559 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:07,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash -506802581, now seen corresponding path program 3 times [2024-06-21 17:36:07,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:07,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336517195] [2024-06-21 17:36:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:08,303 INFO 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 17:36:08,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336517195] [2024-06-21 17:36:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336517195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:08,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:08,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:08,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262527791] [2024-06-21 17:36:08,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:08,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:08,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:08,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 581 transitions, 8322 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:08,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:08,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:08,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:10,176 INFO L124 PetriNetUnfolderBase]: 4770/7721 cut-off events. [2024-06-21 17:36:10,176 INFO L125 PetriNetUnfolderBase]: For 663501/663501 co-relation queries the response was YES. [2024-06-21 17:36:10,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64072 conditions, 7721 events. 4770/7721 cut-off events. For 663501/663501 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51504 event pairs, 852 based on Foata normal form. 4/7718 useless extension candidates. Maximal degree in co-relation 63891. Up to 6925 conditions per place. [2024-06-21 17:36:10,306 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 499 selfloop transitions, 119 changer transitions 0/623 dead transitions. [2024-06-21 17:36:10,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 623 transitions, 10297 flow [2024-06-21 17:36:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:36:10,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 17:36:10,308 INFO L175 Difference]: Start difference. First operand has 379 places, 581 transitions, 8322 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:36:10,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 623 transitions, 10297 flow [2024-06-21 17:36:12,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 623 transitions, 10046 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 17:36:12,557 INFO L231 Difference]: Finished difference. Result has 385 places, 590 transitions, 8497 flow [2024-06-21 17:36:12,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8090, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8497, PETRI_PLACES=385, PETRI_TRANSITIONS=590} [2024-06-21 17:36:12,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-21 17:36:12,558 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 590 transitions, 8497 flow [2024-06-21 17:36:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:12,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:12,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:12,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:36:12,559 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:12,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -391331487, now seen corresponding path program 1 times [2024-06-21 17:36:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:12,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448235407] [2024-06-21 17:36:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:12,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:13,366 INFO 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 17:36:13,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448235407] [2024-06-21 17:36:13,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448235407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:13,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:13,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709012910] [2024-06-21 17:36:13,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:13,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:13,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:13,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:13,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 590 transitions, 8497 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:13,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:13,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:13,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:15,385 INFO L124 PetriNetUnfolderBase]: 4850/7846 cut-off events. [2024-06-21 17:36:15,385 INFO L125 PetriNetUnfolderBase]: For 733076/733076 co-relation queries the response was YES. [2024-06-21 17:36:15,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65505 conditions, 7846 events. 4850/7846 cut-off events. For 733076/733076 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 52485 event pairs, 872 based on Foata normal form. 16/7850 useless extension candidates. Maximal degree in co-relation 65321. Up to 7048 conditions per place. [2024-06-21 17:36:15,510 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 500 selfloop transitions, 126 changer transitions 0/631 dead transitions. [2024-06-21 17:36:15,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 631 transitions, 10435 flow [2024-06-21 17:36:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 17:36:15,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-21 17:36:15,512 INFO L175 Difference]: Start difference. First operand has 385 places, 590 transitions, 8497 flow. Second operand 8 states and 158 transitions. [2024-06-21 17:36:15,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 631 transitions, 10435 flow [2024-06-21 17:36:18,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 631 transitions, 10191 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 17:36:18,037 INFO L231 Difference]: Finished difference. Result has 391 places, 604 transitions, 8931 flow [2024-06-21 17:36:18,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8261, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8931, PETRI_PLACES=391, PETRI_TRANSITIONS=604} [2024-06-21 17:36:18,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-21 17:36:18,038 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 604 transitions, 8931 flow [2024-06-21 17:36:18,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:18,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:18,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:18,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:36:18,038 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:18,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash 133494743, now seen corresponding path program 4 times [2024-06-21 17:36:18,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:18,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275208185] [2024-06-21 17:36:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:18,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:18,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:18,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275208185] [2024-06-21 17:36:18,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275208185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:18,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:18,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:18,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237542319] [2024-06-21 17:36:18,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:18,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:18,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:18,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:19,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:19,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 604 transitions, 8931 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:19,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:19,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:19,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:21,104 INFO L124 PetriNetUnfolderBase]: 4870/7878 cut-off events. [2024-06-21 17:36:21,105 INFO L125 PetriNetUnfolderBase]: For 720056/720056 co-relation queries the response was YES. [2024-06-21 17:36:21,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67173 conditions, 7878 events. 4870/7878 cut-off events. For 720056/720056 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 52719 event pairs, 877 based on Foata normal form. 4/7875 useless extension candidates. Maximal degree in co-relation 66985. Up to 7278 conditions per place. [2024-06-21 17:36:21,223 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 543 selfloop transitions, 94 changer transitions 0/642 dead transitions. [2024-06-21 17:36:21,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 642 transitions, 10764 flow [2024-06-21 17:36:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:36:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:36:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 17:36:21,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-21 17:36:21,224 INFO L175 Difference]: Start difference. First operand has 391 places, 604 transitions, 8931 flow. Second operand 11 states and 200 transitions. [2024-06-21 17:36:21,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 642 transitions, 10764 flow [2024-06-21 17:36:23,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 642 transitions, 10623 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-21 17:36:23,951 INFO L231 Difference]: Finished difference. Result has 401 places, 618 transitions, 9259 flow [2024-06-21 17:36:23,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8790, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9259, PETRI_PLACES=401, PETRI_TRANSITIONS=618} [2024-06-21 17:36:23,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-21 17:36:23,952 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 618 transitions, 9259 flow [2024-06-21 17:36:23,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:23,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:23,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:23,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:36:23,952 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:23,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash -391516185, now seen corresponding path program 3 times [2024-06-21 17:36:23,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:23,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874072353] [2024-06-21 17:36:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:24,785 INFO 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 17:36:24,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:24,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874072353] [2024-06-21 17:36:24,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874072353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:24,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:24,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:24,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603011032] [2024-06-21 17:36:24,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:24,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:24,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:24,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:24,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 618 transitions, 9259 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:24,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:24,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:24,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:26,944 INFO L124 PetriNetUnfolderBase]: 4878/7888 cut-off events. [2024-06-21 17:36:26,944 INFO L125 PetriNetUnfolderBase]: For 723258/723258 co-relation queries the response was YES. [2024-06-21 17:36:27,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67640 conditions, 7888 events. 4878/7888 cut-off events. For 723258/723258 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 52867 event pairs, 1280 based on Foata normal form. 2/7888 useless extension candidates. Maximal degree in co-relation 67449. Up to 7558 conditions per place. [2024-06-21 17:36:27,066 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 605 selfloop transitions, 25 changer transitions 0/635 dead transitions. [2024-06-21 17:36:27,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 635 transitions, 10617 flow [2024-06-21 17:36:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:36:27,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 17:36:27,068 INFO L175 Difference]: Start difference. First operand has 401 places, 618 transitions, 9259 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:36:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 635 transitions, 10617 flow [2024-06-21 17:36:29,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 635 transitions, 10410 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-21 17:36:29,593 INFO L231 Difference]: Finished difference. Result has 407 places, 620 transitions, 9165 flow [2024-06-21 17:36:29,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9052, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9165, PETRI_PLACES=407, PETRI_TRANSITIONS=620} [2024-06-21 17:36:29,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-21 17:36:29,594 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 620 transitions, 9165 flow [2024-06-21 17:36:29,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:29,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:29,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:29,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:36:29,595 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:29,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1011403549, now seen corresponding path program 5 times [2024-06-21 17:36:29,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:29,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518255740] [2024-06-21 17:36:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:29,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:30,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518255740] [2024-06-21 17:36:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518255740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:30,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:30,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:30,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781740596] [2024-06-21 17:36:30,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:30,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:30,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:30,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:30,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 620 transitions, 9165 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:30,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:30,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:30,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:32,467 INFO L124 PetriNetUnfolderBase]: 4942/7983 cut-off events. [2024-06-21 17:36:32,467 INFO L125 PetriNetUnfolderBase]: For 767269/767269 co-relation queries the response was YES. [2024-06-21 17:36:32,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68972 conditions, 7983 events. 4942/7983 cut-off events. For 767269/767269 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 53391 event pairs, 882 based on Foata normal form. 4/7981 useless extension candidates. Maximal degree in co-relation 68779. Up to 7306 conditions per place. [2024-06-21 17:36:32,811 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 554 selfloop transitions, 91 changer transitions 0/650 dead transitions. [2024-06-21 17:36:32,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 650 transitions, 11205 flow [2024-06-21 17:36:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:36:32,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 17:36:32,813 INFO L175 Difference]: Start difference. First operand has 407 places, 620 transitions, 9165 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:36:32,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 650 transitions, 11205 flow [2024-06-21 17:36:35,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 650 transitions, 11098 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 17:36:35,763 INFO L231 Difference]: Finished difference. Result has 410 places, 628 transitions, 9487 flow [2024-06-21 17:36:35,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9058, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9487, PETRI_PLACES=410, PETRI_TRANSITIONS=628} [2024-06-21 17:36:35,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-21 17:36:35,764 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 628 transitions, 9487 flow [2024-06-21 17:36:35,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:35,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:35,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:35,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:36:35,764 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:35,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:35,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1011408199, now seen corresponding path program 6 times [2024-06-21 17:36:35,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:35,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286111356] [2024-06-21 17:36:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:35,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:36,622 INFO 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 17:36:36,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:36,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286111356] [2024-06-21 17:36:36,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286111356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:36,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:36,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:36,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461263910] [2024-06-21 17:36:36,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:36,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:36,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:36,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 628 transitions, 9487 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:36,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:36,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:36,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:38,713 INFO L124 PetriNetUnfolderBase]: 4946/7985 cut-off events. [2024-06-21 17:36:38,713 INFO L125 PetriNetUnfolderBase]: For 773546/773546 co-relation queries the response was YES. [2024-06-21 17:36:38,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69391 conditions, 7985 events. 4946/7985 cut-off events. For 773546/773546 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 53372 event pairs, 878 based on Foata normal form. 4/7982 useless extension candidates. Maximal degree in co-relation 69196. Up to 7385 conditions per place. [2024-06-21 17:36:38,851 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 559 selfloop transitions, 88 changer transitions 0/652 dead transitions. [2024-06-21 17:36:38,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 652 transitions, 11200 flow [2024-06-21 17:36:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:36:38,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 17:36:38,852 INFO L175 Difference]: Start difference. First operand has 410 places, 628 transitions, 9487 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:36:38,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 652 transitions, 11200 flow [2024-06-21 17:36:41,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 652 transitions, 10970 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 17:36:41,587 INFO L231 Difference]: Finished difference. Result has 414 places, 632 transitions, 9567 flow [2024-06-21 17:36:41,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9271, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9567, PETRI_PLACES=414, PETRI_TRANSITIONS=632} [2024-06-21 17:36:41,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-21 17:36:41,588 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 632 transitions, 9567 flow [2024-06-21 17:36:41,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:41,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:41,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:41,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:36:41,589 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:41,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1478257537, now seen corresponding path program 4 times [2024-06-21 17:36:41,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:41,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721649743] [2024-06-21 17:36:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:41,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:42,338 INFO 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 17:36:42,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:42,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721649743] [2024-06-21 17:36:42,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721649743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:42,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:42,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:42,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993035435] [2024-06-21 17:36:42,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:42,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:42,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:42,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:42,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 632 transitions, 9567 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:42,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:42,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:42,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:44,447 INFO L124 PetriNetUnfolderBase]: 4941/7977 cut-off events. [2024-06-21 17:36:44,447 INFO L125 PetriNetUnfolderBase]: For 767386/767386 co-relation queries the response was YES. [2024-06-21 17:36:44,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69242 conditions, 7977 events. 4941/7977 cut-off events. For 767386/767386 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 53411 event pairs, 1256 based on Foata normal form. 2/7977 useless extension candidates. Maximal degree in co-relation 69045. Up to 7613 conditions per place. [2024-06-21 17:36:44,586 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 620 selfloop transitions, 30 changer transitions 0/655 dead transitions. [2024-06-21 17:36:44,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 655 transitions, 10945 flow [2024-06-21 17:36:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:36:44,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:36:44,588 INFO L175 Difference]: Start difference. First operand has 414 places, 632 transitions, 9567 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:36:44,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 655 transitions, 10945 flow [2024-06-21 17:36:47,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 655 transitions, 10654 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 17:36:47,505 INFO L231 Difference]: Finished difference. Result has 415 places, 632 transitions, 9344 flow [2024-06-21 17:36:47,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9276, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9344, PETRI_PLACES=415, PETRI_TRANSITIONS=632} [2024-06-21 17:36:47,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-21 17:36:47,505 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 632 transitions, 9344 flow [2024-06-21 17:36:47,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:47,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:47,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:47,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:36:47,506 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:47,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1250171689, now seen corresponding path program 2 times [2024-06-21 17:36:47,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:47,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992080878] [2024-06-21 17:36:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:48,299 INFO 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 17:36:48,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:48,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992080878] [2024-06-21 17:36:48,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992080878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:48,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:48,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:48,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682158485] [2024-06-21 17:36:48,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:48,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:48,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:48,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:48,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 632 transitions, 9344 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:48,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:48,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:48,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:50,455 INFO L124 PetriNetUnfolderBase]: 4993/8054 cut-off events. [2024-06-21 17:36:50,455 INFO L125 PetriNetUnfolderBase]: For 837278/837278 co-relation queries the response was YES. [2024-06-21 17:36:50,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69574 conditions, 8054 events. 4993/8054 cut-off events. For 837278/837278 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 53903 event pairs, 926 based on Foata normal form. 14/8057 useless extension candidates. Maximal degree in co-relation 69376. Up to 7552 conditions per place. [2024-06-21 17:36:50,583 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 596 selfloop transitions, 50 changer transitions 0/651 dead transitions. [2024-06-21 17:36:50,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 651 transitions, 10860 flow [2024-06-21 17:36:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 17:36:50,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-21 17:36:50,584 INFO L175 Difference]: Start difference. First operand has 415 places, 632 transitions, 9344 flow. Second operand 7 states and 132 transitions. [2024-06-21 17:36:50,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 651 transitions, 10860 flow [2024-06-21 17:36:53,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 651 transitions, 10783 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:36:53,295 INFO L231 Difference]: Finished difference. Result has 415 places, 634 transitions, 9452 flow [2024-06-21 17:36:53,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9267, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9452, PETRI_PLACES=415, PETRI_TRANSITIONS=634} [2024-06-21 17:36:53,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-21 17:36:53,296 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 634 transitions, 9452 flow [2024-06-21 17:36:53,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:53,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:53,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:53,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:36:53,297 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:53,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1241897479, now seen corresponding path program 3 times [2024-06-21 17:36:53,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:53,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009453923] [2024-06-21 17:36:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:53,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:54,023 INFO 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 17:36:54,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009453923] [2024-06-21 17:36:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009453923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:54,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:54,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:54,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295859079] [2024-06-21 17:36:54,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:54,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:54,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:54,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:54,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:36:54,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 634 transitions, 9452 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:54,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:54,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:36:54,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:56,089 INFO L124 PetriNetUnfolderBase]: 5078/8188 cut-off events. [2024-06-21 17:36:56,089 INFO L125 PetriNetUnfolderBase]: For 848772/848772 co-relation queries the response was YES. [2024-06-21 17:36:56,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71099 conditions, 8188 events. 5078/8188 cut-off events. For 848772/848772 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 54873 event pairs, 949 based on Foata normal form. 12/8193 useless extension candidates. Maximal degree in co-relation 70900. Up to 7692 conditions per place. [2024-06-21 17:36:56,237 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 605 selfloop transitions, 47 changer transitions 0/657 dead transitions. [2024-06-21 17:36:56,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 657 transitions, 11045 flow [2024-06-21 17:36:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 17:36:56,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-21 17:36:56,238 INFO L175 Difference]: Start difference. First operand has 415 places, 634 transitions, 9452 flow. Second operand 7 states and 132 transitions. [2024-06-21 17:36:56,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 657 transitions, 11045 flow [2024-06-21 17:36:59,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 657 transitions, 10886 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:36:59,410 INFO L231 Difference]: Finished difference. Result has 419 places, 640 transitions, 9562 flow [2024-06-21 17:36:59,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9308, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9562, PETRI_PLACES=419, PETRI_TRANSITIONS=640} [2024-06-21 17:36:59,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-21 17:36:59,411 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 640 transitions, 9562 flow [2024-06-21 17:36:59,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:59,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:59,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:59,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:36:59,411 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:59,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1250178633, now seen corresponding path program 7 times [2024-06-21 17:36:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:59,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334522764] [2024-06-21 17:36:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:00,083 INFO 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 17:37:00,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:00,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334522764] [2024-06-21 17:37:00,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334522764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:00,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:00,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233239310] [2024-06-21 17:37:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:00,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:00,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:00,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:00,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 640 transitions, 9562 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:00,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:00,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:00,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:02,299 INFO L124 PetriNetUnfolderBase]: 5110/8237 cut-off events. [2024-06-21 17:37:02,299 INFO L125 PetriNetUnfolderBase]: For 828052/828052 co-relation queries the response was YES. [2024-06-21 17:37:02,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71718 conditions, 8237 events. 5110/8237 cut-off events. For 828052/828052 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 55196 event pairs, 949 based on Foata normal form. 4/8235 useless extension candidates. Maximal degree in co-relation 71518. Up to 7808 conditions per place. [2024-06-21 17:37:02,442 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 609 selfloop transitions, 51 changer transitions 0/665 dead transitions. [2024-06-21 17:37:02,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 665 transitions, 11423 flow [2024-06-21 17:37:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:37:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:37:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:37:02,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-21 17:37:02,444 INFO L175 Difference]: Start difference. First operand has 419 places, 640 transitions, 9562 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:37:02,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 665 transitions, 11423 flow [2024-06-21 17:37:05,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 665 transitions, 11252 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:05,298 INFO L231 Difference]: Finished difference. Result has 426 places, 649 transitions, 9802 flow [2024-06-21 17:37:05,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9391, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9802, PETRI_PLACES=426, PETRI_TRANSITIONS=649} [2024-06-21 17:37:05,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-21 17:37:05,299 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 649 transitions, 9802 flow [2024-06-21 17:37:05,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:05,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:05,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:37:05,300 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:05,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 576096161, now seen corresponding path program 4 times [2024-06-21 17:37:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:05,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141267996] [2024-06-21 17:37:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:06,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:06,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141267996] [2024-06-21 17:37:06,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141267996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:06,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:06,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:06,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716008719] [2024-06-21 17:37:06,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:06,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:06,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:06,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:06,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:06,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 649 transitions, 9802 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:06,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:06,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:06,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:08,384 INFO L124 PetriNetUnfolderBase]: 5156/8312 cut-off events. [2024-06-21 17:37:08,384 INFO L125 PetriNetUnfolderBase]: For 895231/895231 co-relation queries the response was YES. [2024-06-21 17:37:08,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72274 conditions, 8312 events. 5156/8312 cut-off events. For 895231/895231 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 55782 event pairs, 891 based on Foata normal form. 16/8316 useless extension candidates. Maximal degree in co-relation 72073. Up to 7443 conditions per place. [2024-06-21 17:37:08,520 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 542 selfloop transitions, 126 changer transitions 0/673 dead transitions. [2024-06-21 17:37:08,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 673 transitions, 11425 flow [2024-06-21 17:37:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 17:37:08,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-21 17:37:08,521 INFO L175 Difference]: Start difference. First operand has 426 places, 649 transitions, 9802 flow. Second operand 7 states and 139 transitions. [2024-06-21 17:37:08,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 673 transitions, 11425 flow [2024-06-21 17:37:11,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 673 transitions, 11166 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:11,516 INFO L231 Difference]: Finished difference. Result has 429 places, 651 transitions, 9947 flow [2024-06-21 17:37:11,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9557, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9947, PETRI_PLACES=429, PETRI_TRANSITIONS=651} [2024-06-21 17:37:11,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-21 17:37:11,517 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 651 transitions, 9947 flow [2024-06-21 17:37:11,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:11,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:11,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:11,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:37:11,517 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:11,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash 576089217, now seen corresponding path program 8 times [2024-06-21 17:37:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:11,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283851189] [2024-06-21 17:37:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:12,315 INFO 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 17:37:12,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283851189] [2024-06-21 17:37:12,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283851189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:12,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:12,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:12,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089141511] [2024-06-21 17:37:12,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:12,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:12,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:12,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:12,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:12,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:12,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 651 transitions, 9947 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:12,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:12,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:12,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:14,620 INFO L124 PetriNetUnfolderBase]: 5186/8348 cut-off events. [2024-06-21 17:37:14,620 INFO L125 PetriNetUnfolderBase]: For 875667/875667 co-relation queries the response was YES. [2024-06-21 17:37:14,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73276 conditions, 8348 events. 5186/8348 cut-off events. For 875667/875667 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 55990 event pairs, 953 based on Foata normal form. 6/8347 useless extension candidates. Maximal degree in co-relation 73072. Up to 7483 conditions per place. [2024-06-21 17:37:14,762 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 532 selfloop transitions, 144 changer transitions 0/681 dead transitions. [2024-06-21 17:37:14,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 681 transitions, 11729 flow [2024-06-21 17:37:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:37:14,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 17:37:14,764 INFO L175 Difference]: Start difference. First operand has 429 places, 651 transitions, 9947 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:37:14,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 681 transitions, 11729 flow [2024-06-21 17:37:17,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 681 transitions, 11403 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:17,231 INFO L231 Difference]: Finished difference. Result has 432 places, 658 transitions, 10150 flow [2024-06-21 17:37:17,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9621, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10150, PETRI_PLACES=432, PETRI_TRANSITIONS=658} [2024-06-21 17:37:17,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 17:37:17,232 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 658 transitions, 10150 flow [2024-06-21 17:37:17,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:17,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:17,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:17,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:37:17,232 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:17,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1241897727, now seen corresponding path program 1 times [2024-06-21 17:37:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:17,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430318646] [2024-06-21 17:37:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:17,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430318646] [2024-06-21 17:37:17,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430318646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:17,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:17,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:17,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926855210] [2024-06-21 17:37:17,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:17,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:17,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:18,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:18,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 658 transitions, 10150 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:18,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:18,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:18,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:20,337 INFO L124 PetriNetUnfolderBase]: 5186/8350 cut-off events. [2024-06-21 17:37:20,338 INFO L125 PetriNetUnfolderBase]: For 860192/860192 co-relation queries the response was YES. [2024-06-21 17:37:20,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73680 conditions, 8350 events. 5186/8350 cut-off events. For 860192/860192 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 56001 event pairs, 970 based on Foata normal form. 4/8342 useless extension candidates. Maximal degree in co-relation 73476. Up to 7823 conditions per place. [2024-06-21 17:37:20,472 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 592 selfloop transitions, 75 changer transitions 0/672 dead transitions. [2024-06-21 17:37:20,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 672 transitions, 11628 flow [2024-06-21 17:37:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 17:37:20,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-21 17:37:20,473 INFO L175 Difference]: Start difference. First operand has 432 places, 658 transitions, 10150 flow. Second operand 7 states and 132 transitions. [2024-06-21 17:37:20,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 672 transitions, 11628 flow [2024-06-21 17:37:23,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 672 transitions, 11093 flow, removed 128 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:23,669 INFO L231 Difference]: Finished difference. Result has 433 places, 661 transitions, 9885 flow [2024-06-21 17:37:23,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9615, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9885, PETRI_PLACES=433, PETRI_TRANSITIONS=661} [2024-06-21 17:37:23,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-21 17:37:23,670 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 661 transitions, 9885 flow [2024-06-21 17:37:23,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:23,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:23,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:23,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:37:23,670 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:23,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash 575916237, now seen corresponding path program 9 times [2024-06-21 17:37:23,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:23,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140196149] [2024-06-21 17:37:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:23,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:24,536 INFO 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 17:37:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:24,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140196149] [2024-06-21 17:37:24,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140196149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:24,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:24,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079564444] [2024-06-21 17:37:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:24,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:24,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:24,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:24,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:24,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:24,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 661 transitions, 9885 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:24,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:24,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:24,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:26,956 INFO L124 PetriNetUnfolderBase]: 5216/8390 cut-off events. [2024-06-21 17:37:26,956 INFO L125 PetriNetUnfolderBase]: For 888560/888560 co-relation queries the response was YES. [2024-06-21 17:37:27,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74157 conditions, 8390 events. 5216/8390 cut-off events. For 888560/888560 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 56239 event pairs, 938 based on Foata normal form. 6/8389 useless extension candidates. Maximal degree in co-relation 73952. Up to 7525 conditions per place. [2024-06-21 17:37:27,103 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 535 selfloop transitions, 153 changer transitions 0/693 dead transitions. [2024-06-21 17:37:27,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 693 transitions, 11692 flow [2024-06-21 17:37:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 17:37:27,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-21 17:37:27,105 INFO L175 Difference]: Start difference. First operand has 433 places, 661 transitions, 9885 flow. Second operand 8 states and 157 transitions. [2024-06-21 17:37:27,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 693 transitions, 11692 flow [2024-06-21 17:37:30,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 693 transitions, 11474 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:30,984 INFO L231 Difference]: Finished difference. Result has 436 places, 668 transitions, 10232 flow [2024-06-21 17:37:30,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9669, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10232, PETRI_PLACES=436, PETRI_TRANSITIONS=668} [2024-06-21 17:37:30,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-21 17:37:30,984 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 668 transitions, 10232 flow [2024-06-21 17:37:30,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:30,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:30,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:30,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:37:30,985 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:30,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash 582591281, now seen corresponding path program 5 times [2024-06-21 17:37:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:30,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165841717] [2024-06-21 17:37:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:31,782 INFO 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 17:37:31,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:31,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165841717] [2024-06-21 17:37:31,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165841717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:31,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:31,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:31,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636184744] [2024-06-21 17:37:31,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:31,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:31,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:31,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:31,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:31,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:31,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 668 transitions, 10232 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:31,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:31,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:31,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:34,206 INFO L124 PetriNetUnfolderBase]: 5283/8499 cut-off events. [2024-06-21 17:37:34,207 INFO L125 PetriNetUnfolderBase]: For 935014/935014 co-relation queries the response was YES. [2024-06-21 17:37:34,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75798 conditions, 8499 events. 5283/8499 cut-off events. For 935014/935014 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 57150 event pairs, 968 based on Foata normal form. 14/8501 useless extension candidates. Maximal degree in co-relation 75592. Up to 7930 conditions per place. [2024-06-21 17:37:34,353 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 636 selfloop transitions, 51 changer transitions 0/692 dead transitions. [2024-06-21 17:37:34,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 692 transitions, 11931 flow [2024-06-21 17:37:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 17:37:34,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 17:37:34,354 INFO L175 Difference]: Start difference. First operand has 436 places, 668 transitions, 10232 flow. Second operand 7 states and 136 transitions. [2024-06-21 17:37:34,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 692 transitions, 11931 flow [2024-06-21 17:37:37,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 692 transitions, 11428 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:37,777 INFO L231 Difference]: Finished difference. Result has 438 places, 673 transitions, 9978 flow [2024-06-21 17:37:37,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9729, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9978, PETRI_PLACES=438, PETRI_TRANSITIONS=673} [2024-06-21 17:37:37,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-21 17:37:37,777 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 673 transitions, 9978 flow [2024-06-21 17:37:37,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:37,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:37,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:37,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:37:37,778 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:37,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1478257413, now seen corresponding path program 10 times [2024-06-21 17:37:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:37,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171403470] [2024-06-21 17:37:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:38,511 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 17:37:38,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:38,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171403470] [2024-06-21 17:37:38,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171403470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:38,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:38,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:38,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152858831] [2024-06-21 17:37:38,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:38,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:38,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:38,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 673 transitions, 9978 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:38,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:38,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:38,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:41,007 INFO L124 PetriNetUnfolderBase]: 5291/8495 cut-off events. [2024-06-21 17:37:41,007 INFO L125 PetriNetUnfolderBase]: For 882014/882014 co-relation queries the response was YES. [2024-06-21 17:37:41,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75531 conditions, 8495 events. 5291/8495 cut-off events. For 882014/882014 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 56985 event pairs, 955 based on Foata normal form. 4/8492 useless extension candidates. Maximal degree in co-relation 75323. Up to 7694 conditions per place. [2024-06-21 17:37:41,148 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 576 selfloop transitions, 127 changer transitions 0/708 dead transitions. [2024-06-21 17:37:41,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 708 transitions, 12383 flow [2024-06-21 17:37:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 17:37:41,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-21 17:37:41,150 INFO L175 Difference]: Start difference. First operand has 438 places, 673 transitions, 9978 flow. Second operand 8 states and 162 transitions. [2024-06-21 17:37:41,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 708 transitions, 12383 flow [2024-06-21 17:37:44,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 708 transitions, 12203 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 17:37:44,841 INFO L231 Difference]: Finished difference. Result has 443 places, 678 transitions, 10304 flow [2024-06-21 17:37:44,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9798, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10304, PETRI_PLACES=443, PETRI_TRANSITIONS=678} [2024-06-21 17:37:44,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-21 17:37:44,842 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 678 transitions, 10304 flow [2024-06-21 17:37:44,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:44,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:44,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:37:44,842 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:44,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1902876299, now seen corresponding path program 1 times [2024-06-21 17:37:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:44,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141474433] [2024-06-21 17:37:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:45,623 INFO 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 17:37:45,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:45,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141474433] [2024-06-21 17:37:45,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141474433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:45,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:45,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:45,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251918229] [2024-06-21 17:37:45,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:45,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:45,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:45,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:45,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:45,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 678 transitions, 10304 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:45,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:48,085 INFO L124 PetriNetUnfolderBase]: 5362/8615 cut-off events. [2024-06-21 17:37:48,085 INFO L125 PetriNetUnfolderBase]: For 934981/934981 co-relation queries the response was YES. [2024-06-21 17:37:48,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78091 conditions, 8615 events. 5362/8615 cut-off events. For 934981/934981 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 57898 event pairs, 982 based on Foata normal form. 3/8616 useless extension candidates. Maximal degree in co-relation 77881. Up to 7895 conditions per place. [2024-06-21 17:37:48,231 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 583 selfloop transitions, 143 changer transitions 0/731 dead transitions. [2024-06-21 17:37:48,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 731 transitions, 12778 flow [2024-06-21 17:37:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:37:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:37:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 17:37:48,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 17:37:48,232 INFO L175 Difference]: Start difference. First operand has 443 places, 678 transitions, 10304 flow. Second operand 10 states and 195 transitions. [2024-06-21 17:37:48,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 731 transitions, 12778 flow [2024-06-21 17:37:52,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 731 transitions, 12027 flow, removed 94 selfloop flow, removed 9 redundant places. [2024-06-21 17:37:52,011 INFO L231 Difference]: Finished difference. Result has 445 places, 698 transitions, 10587 flow [2024-06-21 17:37:52,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9605, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10587, PETRI_PLACES=445, PETRI_TRANSITIONS=698} [2024-06-21 17:37:52,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-21 17:37:52,011 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 698 transitions, 10587 flow [2024-06-21 17:37:52,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:52,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:52,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:52,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:37:52,012 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:52,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:52,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1945905271, now seen corresponding path program 2 times [2024-06-21 17:37:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082043295] [2024-06-21 17:37:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:52,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:52,876 INFO 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 17:37:52,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:52,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082043295] [2024-06-21 17:37:52,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082043295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:52,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:52,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:52,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477716079] [2024-06-21 17:37:52,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:52,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:52,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:52,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:52,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:52,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:37:52,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 698 transitions, 10587 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:52,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:52,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:37:52,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:55,460 INFO L124 PetriNetUnfolderBase]: 5364/8628 cut-off events. [2024-06-21 17:37:55,461 INFO L125 PetriNetUnfolderBase]: For 945139/945139 co-relation queries the response was YES. [2024-06-21 17:37:55,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77514 conditions, 8628 events. 5364/8628 cut-off events. For 945139/945139 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 58114 event pairs, 994 based on Foata normal form. 2/8628 useless extension candidates. Maximal degree in co-relation 77305. Up to 8153 conditions per place. [2024-06-21 17:37:55,620 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 646 selfloop transitions, 71 changer transitions 0/722 dead transitions. [2024-06-21 17:37:55,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 722 transitions, 12230 flow [2024-06-21 17:37:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:37:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:37:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:37:55,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 17:37:55,626 INFO L175 Difference]: Start difference. First operand has 445 places, 698 transitions, 10587 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:37:55,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 722 transitions, 12230 flow [2024-06-21 17:37:59,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 722 transitions, 11797 flow, removed 150 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:59,514 INFO L231 Difference]: Finished difference. Result has 448 places, 701 transitions, 10439 flow [2024-06-21 17:37:59,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10186, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10439, PETRI_PLACES=448, PETRI_TRANSITIONS=701} [2024-06-21 17:37:59,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-21 17:37:59,515 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 701 transitions, 10439 flow [2024-06-21 17:37:59,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:59,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:59,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:59,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:37:59,516 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:59,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1739336809, now seen corresponding path program 3 times [2024-06-21 17:37:59,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:59,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233394964] [2024-06-21 17:37:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:59,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:00,344 INFO 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 17:38:00,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:00,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233394964] [2024-06-21 17:38:00,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233394964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:00,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:00,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852535973] [2024-06-21 17:38:00,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:00,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:00,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:00,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:38:00,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 701 transitions, 10439 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:00,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:00,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:38:00,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:02,871 INFO L124 PetriNetUnfolderBase]: 5374/8644 cut-off events. [2024-06-21 17:38:02,871 INFO L125 PetriNetUnfolderBase]: For 957163/957163 co-relation queries the response was YES. [2024-06-21 17:38:02,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77611 conditions, 8644 events. 5374/8644 cut-off events. For 957163/957163 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 58213 event pairs, 993 based on Foata normal form. 2/8644 useless extension candidates. Maximal degree in co-relation 77400. Up to 8249 conditions per place. [2024-06-21 17:38:03,018 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 674 selfloop transitions, 46 changer transitions 0/725 dead transitions. [2024-06-21 17:38:03,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 725 transitions, 12155 flow [2024-06-21 17:38:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:38:03,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 17:38:03,019 INFO L175 Difference]: Start difference. First operand has 448 places, 701 transitions, 10439 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:38:03,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 725 transitions, 12155 flow [2024-06-21 17:38:07,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 725 transitions, 11891 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:07,246 INFO L231 Difference]: Finished difference. Result has 450 places, 707 transitions, 10483 flow [2024-06-21 17:38:07,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10175, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10483, PETRI_PLACES=450, PETRI_TRANSITIONS=707} [2024-06-21 17:38:07,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-21 17:38:07,247 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 707 transitions, 10483 flow [2024-06-21 17:38:07,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:07,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:07,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:07,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:38:07,248 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:07,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1723078627, now seen corresponding path program 4 times [2024-06-21 17:38:07,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:07,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193513245] [2024-06-21 17:38:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:07,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:08,164 INFO 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 17:38:08,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:08,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193513245] [2024-06-21 17:38:08,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193513245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:08,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:08,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:08,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993185499] [2024-06-21 17:38:08,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:08,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:08,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:08,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:38:08,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 707 transitions, 10483 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:08,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:08,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:38:08,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:10,799 INFO L124 PetriNetUnfolderBase]: 5461/8756 cut-off events. [2024-06-21 17:38:10,799 INFO L125 PetriNetUnfolderBase]: For 1039334/1039334 co-relation queries the response was YES. [2024-06-21 17:38:10,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80204 conditions, 8756 events. 5461/8756 cut-off events. For 1039334/1039334 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 58713 event pairs, 929 based on Foata normal form. 3/8753 useless extension candidates. Maximal degree in co-relation 79992. Up to 7493 conditions per place. [2024-06-21 17:38:10,960 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 534 selfloop transitions, 228 changer transitions 0/767 dead transitions. [2024-06-21 17:38:10,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 767 transitions, 13145 flow [2024-06-21 17:38:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:38:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:38:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 17:38:10,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48048780487804876 [2024-06-21 17:38:10,962 INFO L175 Difference]: Start difference. First operand has 450 places, 707 transitions, 10483 flow. Second operand 10 states and 197 transitions. [2024-06-21 17:38:10,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 767 transitions, 13145 flow [2024-06-21 17:38:14,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 767 transitions, 12911 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:14,929 INFO L231 Difference]: Finished difference. Result has 454 places, 728 transitions, 11431 flow [2024-06-21 17:38:14,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10249, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11431, PETRI_PLACES=454, PETRI_TRANSITIONS=728} [2024-06-21 17:38:14,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-21 17:38:14,930 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 728 transitions, 11431 flow [2024-06-21 17:38:14,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:14,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:14,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:14,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:38:14,931 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:14,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2027244439, now seen corresponding path program 5 times [2024-06-21 17:38:14,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369944696] [2024-06-21 17:38:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:15,851 INFO 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 17:38:15,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:15,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369944696] [2024-06-21 17:38:15,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369944696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:15,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:15,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:15,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818446315] [2024-06-21 17:38:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:15,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:15,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:15,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:15,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:15,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:38:15,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 728 transitions, 11431 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:15,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:15,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:38:15,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:18,414 INFO L124 PetriNetUnfolderBase]: 5471/8780 cut-off events. [2024-06-21 17:38:18,414 INFO L125 PetriNetUnfolderBase]: For 1063571/1063571 co-relation queries the response was YES. [2024-06-21 17:38:18,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82215 conditions, 8780 events. 5471/8780 cut-off events. For 1063571/1063571 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 59030 event pairs, 935 based on Foata normal form. 2/8775 useless extension candidates. Maximal degree in co-relation 82001. Up to 8132 conditions per place. [2024-06-21 17:38:18,575 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 652 selfloop transitions, 100 changer transitions 0/757 dead transitions. [2024-06-21 17:38:18,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 757 transitions, 13294 flow [2024-06-21 17:38:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:38:18,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 17:38:18,576 INFO L175 Difference]: Start difference. First operand has 454 places, 728 transitions, 11431 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:38:18,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 757 transitions, 13294 flow [2024-06-21 17:38:23,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 757 transitions, 12500 flow, removed 177 selfloop flow, removed 9 redundant places. [2024-06-21 17:38:23,075 INFO L231 Difference]: Finished difference. Result has 454 places, 734 transitions, 11083 flow [2024-06-21 17:38:23,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10683, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11083, PETRI_PLACES=454, PETRI_TRANSITIONS=734} [2024-06-21 17:38:23,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-21 17:38:23,076 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 734 transitions, 11083 flow [2024-06-21 17:38:23,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:23,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:23,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:23,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:38:23,076 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:23,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1625494795, now seen corresponding path program 6 times [2024-06-21 17:38:23,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:23,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7121034] [2024-06-21 17:38:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:23,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:24,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7121034] [2024-06-21 17:38:24,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7121034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:24,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:24,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991995196] [2024-06-21 17:38:24,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:24,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:24,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:24,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:38:24,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 734 transitions, 11083 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:24,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:24,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:38:24,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:26,697 INFO L124 PetriNetUnfolderBase]: 5582/8937 cut-off events. [2024-06-21 17:38:26,697 INFO L125 PetriNetUnfolderBase]: For 1162494/1162494 co-relation queries the response was YES. [2024-06-21 17:38:26,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84922 conditions, 8937 events. 5582/8937 cut-off events. For 1162494/1162494 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 59995 event pairs, 921 based on Foata normal form. 3/8933 useless extension candidates. Maximal degree in co-relation 84709. Up to 7654 conditions per place. [2024-06-21 17:38:26,868 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 561 selfloop transitions, 230 changer transitions 0/796 dead transitions. [2024-06-21 17:38:26,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 796 transitions, 13907 flow [2024-06-21 17:38:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:38:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:38:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 17:38:26,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-21 17:38:26,869 INFO L175 Difference]: Start difference. First operand has 454 places, 734 transitions, 11083 flow. Second operand 10 states and 196 transitions. [2024-06-21 17:38:26,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 796 transitions, 13907 flow [2024-06-21 17:38:31,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 796 transitions, 13581 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:31,421 INFO L231 Difference]: Finished difference. Result has 458 places, 759 transitions, 12071 flow [2024-06-21 17:38:31,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10757, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12071, PETRI_PLACES=458, PETRI_TRANSITIONS=759} [2024-06-21 17:38:31,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-21 17:38:31,422 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 759 transitions, 12071 flow [2024-06-21 17:38:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:31,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:31,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:38:31,423 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:31,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1369759715, now seen corresponding path program 7 times [2024-06-21 17:38:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:31,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315469170] [2024-06-21 17:38:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:31,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:32,231 INFO 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 17:38:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315469170] [2024-06-21 17:38:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315469170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:32,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:32,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:32,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879347548] [2024-06-21 17:38:32,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:32,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:32,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:38:32,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 759 transitions, 12071 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:32,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:32,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:38:32,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:34,950 INFO L124 PetriNetUnfolderBase]: 5595/8958 cut-off events. [2024-06-21 17:38:34,951 INFO L125 PetriNetUnfolderBase]: For 1189142/1189142 co-relation queries the response was YES. [2024-06-21 17:38:35,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86930 conditions, 8958 events. 5595/8958 cut-off events. For 1189142/1189142 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 60161 event pairs, 909 based on Foata normal form. 1/8952 useless extension candidates. Maximal degree in co-relation 86715. Up to 7660 conditions per place. [2024-06-21 17:38:35,122 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 564 selfloop transitions, 231 changer transitions 0/800 dead transitions. [2024-06-21 17:38:35,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 800 transitions, 14939 flow [2024-06-21 17:38:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 17:38:35,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-21 17:38:35,123 INFO L175 Difference]: Start difference. First operand has 458 places, 759 transitions, 12071 flow. Second operand 9 states and 181 transitions. [2024-06-21 17:38:35,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 800 transitions, 14939 flow [2024-06-21 17:38:39,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 800 transitions, 14338 flow, removed 171 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:39,958 INFO L231 Difference]: Finished difference. Result has 461 places, 765 transitions, 12123 flow [2024-06-21 17:38:39,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11472, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12123, PETRI_PLACES=461, PETRI_TRANSITIONS=765} [2024-06-21 17:38:39,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-21 17:38:39,959 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 765 transitions, 12123 flow [2024-06-21 17:38:39,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:39,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:39,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:39,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:38:39,960 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:39,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1922974825, now seen corresponding path program 8 times [2024-06-21 17:38:39,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:39,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697189679] [2024-06-21 17:38:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:39,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697189679] [2024-06-21 17:38:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697189679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:40,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:40,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968255970] [2024-06-21 17:38:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:40,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:40,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:40,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:40,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:38:40,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 765 transitions, 12123 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:40,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:40,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:38:40,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:43,579 INFO L124 PetriNetUnfolderBase]: 5625/8997 cut-off events. [2024-06-21 17:38:43,579 INFO L125 PetriNetUnfolderBase]: For 1252347/1252347 co-relation queries the response was YES. [2024-06-21 17:38:43,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87749 conditions, 8997 events. 5625/8997 cut-off events. For 1252347/1252347 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 60362 event pairs, 918 based on Foata normal form. 12/9002 useless extension candidates. Maximal degree in co-relation 87532. Up to 7117 conditions per place. [2024-06-21 17:38:43,755 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 441 selfloop transitions, 372 changer transitions 0/818 dead transitions. [2024-06-21 17:38:43,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 818 transitions, 14959 flow [2024-06-21 17:38:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:38:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:38:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 17:38:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811529933481153 [2024-06-21 17:38:43,756 INFO L175 Difference]: Start difference. First operand has 461 places, 765 transitions, 12123 flow. Second operand 11 states and 217 transitions. [2024-06-21 17:38:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 818 transitions, 14959 flow [2024-06-21 17:38:48,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 818 transitions, 14326 flow, removed 161 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:48,589 INFO L231 Difference]: Finished difference. Result has 468 places, 781 transitions, 12939 flow [2024-06-21 17:38:48,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11528, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12939, PETRI_PLACES=468, PETRI_TRANSITIONS=781} [2024-06-21 17:38:48,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-21 17:38:48,590 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 781 transitions, 12939 flow [2024-06-21 17:38:48,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:48,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:48,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:48,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:38:48,592 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:48,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash 739319779, now seen corresponding path program 9 times [2024-06-21 17:38:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:48,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405438025] [2024-06-21 17:38:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:48,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:49,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:49,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405438025] [2024-06-21 17:38:49,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405438025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:49,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:49,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:49,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220053973] [2024-06-21 17:38:49,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:49,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:49,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:49,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:49,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:38:49,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 781 transitions, 12939 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:49,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:49,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:38:49,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:52,354 INFO L124 PetriNetUnfolderBase]: 5616/8997 cut-off events. [2024-06-21 17:38:52,354 INFO L125 PetriNetUnfolderBase]: For 1201616/1201616 co-relation queries the response was YES. [2024-06-21 17:38:52,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88868 conditions, 8997 events. 5616/8997 cut-off events. For 1201616/1201616 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 60518 event pairs, 949 based on Foata normal form. 3/8993 useless extension candidates. Maximal degree in co-relation 88649. Up to 8283 conditions per place. [2024-06-21 17:38:52,529 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 698 selfloop transitions, 105 changer transitions 0/808 dead transitions. [2024-06-21 17:38:52,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 808 transitions, 14968 flow [2024-06-21 17:38:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:38:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:38:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 17:38:52,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-21 17:38:52,530 INFO L175 Difference]: Start difference. First operand has 468 places, 781 transitions, 12939 flow. Second operand 10 states and 186 transitions. [2024-06-21 17:38:52,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 808 transitions, 14968 flow [2024-06-21 17:38:58,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 808 transitions, 14517 flow, removed 97 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:58,262 INFO L231 Difference]: Finished difference. Result has 473 places, 786 transitions, 12808 flow [2024-06-21 17:38:58,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12488, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12808, PETRI_PLACES=473, PETRI_TRANSITIONS=786} [2024-06-21 17:38:58,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-21 17:38:58,263 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 786 transitions, 12808 flow [2024-06-21 17:38:58,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:58,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:58,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:58,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:38:58,264 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:58,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash 747593989, now seen corresponding path program 10 times [2024-06-21 17:38:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:58,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333285676] [2024-06-21 17:38:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:58,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:59,286 INFO 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 17:38:59,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333285676] [2024-06-21 17:38:59,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333285676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:59,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:59,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:59,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339544558] [2024-06-21 17:38:59,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:59,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:59,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:59,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:59,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:38:59,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 786 transitions, 12808 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:59,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:59,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:38:59,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:02,205 INFO L124 PetriNetUnfolderBase]: 5594/8955 cut-off events. [2024-06-21 17:39:02,205 INFO L125 PetriNetUnfolderBase]: For 1193092/1193092 co-relation queries the response was YES. [2024-06-21 17:39:02,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87908 conditions, 8955 events. 5594/8955 cut-off events. For 1193092/1193092 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 60193 event pairs, 940 based on Foata normal form. 6/8954 useless extension candidates. Maximal degree in co-relation 87686. Up to 8264 conditions per place. [2024-06-21 17:39:02,359 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 698 selfloop transitions, 100 changer transitions 0/803 dead transitions. [2024-06-21 17:39:02,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 803 transitions, 14500 flow [2024-06-21 17:39:02,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:39:02,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:39:02,360 INFO L175 Difference]: Start difference. First operand has 473 places, 786 transitions, 12808 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:39:02,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 803 transitions, 14500 flow [2024-06-21 17:39:06,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 803 transitions, 14210 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-21 17:39:06,942 INFO L231 Difference]: Finished difference. Result has 478 places, 786 transitions, 12738 flow [2024-06-21 17:39:06,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12518, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12738, PETRI_PLACES=478, PETRI_TRANSITIONS=786} [2024-06-21 17:39:06,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-21 17:39:06,943 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 786 transitions, 12738 flow [2024-06-21 17:39:06,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:06,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:06,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:06,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:39:06,944 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:06,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:06,944 INFO L85 PathProgramCache]: Analyzing trace with hash -701213109, now seen corresponding path program 11 times [2024-06-21 17:39:06,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:06,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236311583] [2024-06-21 17:39:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:06,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:07,735 INFO 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 17:39:07,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:07,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236311583] [2024-06-21 17:39:07,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236311583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:07,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:07,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:07,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731452563] [2024-06-21 17:39:07,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:07,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:07,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:07,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:39:07,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 786 transitions, 12738 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:07,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:07,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:39:07,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:10,454 INFO L124 PetriNetUnfolderBase]: 5576/8933 cut-off events. [2024-06-21 17:39:10,455 INFO L125 PetriNetUnfolderBase]: For 1166965/1166965 co-relation queries the response was YES. [2024-06-21 17:39:10,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86735 conditions, 8933 events. 5576/8933 cut-off events. For 1166965/1166965 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 60105 event pairs, 1005 based on Foata normal form. 6/8937 useless extension candidates. Maximal degree in co-relation 86512. Up to 8276 conditions per place. [2024-06-21 17:39:10,628 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 681 selfloop transitions, 128 changer transitions 0/814 dead transitions. [2024-06-21 17:39:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 814 transitions, 14499 flow [2024-06-21 17:39:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 17:39:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:39:10,629 INFO L175 Difference]: Start difference. First operand has 478 places, 786 transitions, 12738 flow. Second operand 8 states and 164 transitions. [2024-06-21 17:39:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 814 transitions, 14499 flow [2024-06-21 17:39:15,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 814 transitions, 14180 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:16,006 INFO L231 Difference]: Finished difference. Result has 480 places, 786 transitions, 12729 flow [2024-06-21 17:39:16,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12419, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12729, PETRI_PLACES=480, PETRI_TRANSITIONS=786} [2024-06-21 17:39:16,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-21 17:39:16,006 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 786 transitions, 12729 flow [2024-06-21 17:39:16,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:16,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:16,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:16,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:39:16,007 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:16,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1418647115, now seen corresponding path program 12 times [2024-06-21 17:39:16,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:16,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308452779] [2024-06-21 17:39:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:16,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:16,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308452779] [2024-06-21 17:39:16,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308452779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:16,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:16,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:16,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714139827] [2024-06-21 17:39:16,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:16,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:16,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:16,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:16,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:16,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:39:16,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 786 transitions, 12729 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:16,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:16,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:39:16,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:19,369 INFO L124 PetriNetUnfolderBase]: 5564/8904 cut-off events. [2024-06-21 17:39:19,370 INFO L125 PetriNetUnfolderBase]: For 1138944/1138944 co-relation queries the response was YES. [2024-06-21 17:39:19,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86079 conditions, 8904 events. 5564/8904 cut-off events. For 1138944/1138944 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 59843 event pairs, 974 based on Foata normal form. 4/8901 useless extension candidates. Maximal degree in co-relation 85855. Up to 8038 conditions per place. [2024-06-21 17:39:19,545 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 660 selfloop transitions, 155 changer transitions 0/820 dead transitions. [2024-06-21 17:39:19,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 820 transitions, 15256 flow [2024-06-21 17:39:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 17:39:19,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 17:39:19,547 INFO L175 Difference]: Start difference. First operand has 480 places, 786 transitions, 12729 flow. Second operand 9 states and 180 transitions. [2024-06-21 17:39:19,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 820 transitions, 15256 flow [2024-06-21 17:39:25,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 820 transitions, 14846 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 17:39:25,358 INFO L231 Difference]: Finished difference. Result has 482 places, 786 transitions, 12657 flow [2024-06-21 17:39:25,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12329, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12657, PETRI_PLACES=482, PETRI_TRANSITIONS=786} [2024-06-21 17:39:25,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-21 17:39:25,359 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 786 transitions, 12657 flow [2024-06-21 17:39:25,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:25,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:25,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:25,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:39:25,360 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:25,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1418350445, now seen corresponding path program 13 times [2024-06-21 17:39:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:25,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690795386] [2024-06-21 17:39:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:25,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:26,137 INFO 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 17:39:26,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690795386] [2024-06-21 17:39:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690795386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:26,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:26,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586535086] [2024-06-21 17:39:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:26,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:39:26,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 786 transitions, 12657 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:26,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:26,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:39:26,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:28,816 INFO L124 PetriNetUnfolderBase]: 5570/8912 cut-off events. [2024-06-21 17:39:28,817 INFO L125 PetriNetUnfolderBase]: For 1124085/1124085 co-relation queries the response was YES. [2024-06-21 17:39:28,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86021 conditions, 8912 events. 5570/8912 cut-off events. For 1124085/1124085 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 59889 event pairs, 978 based on Foata normal form. 4/8909 useless extension candidates. Maximal degree in co-relation 85796. Up to 8235 conditions per place. [2024-06-21 17:39:28,988 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 708 selfloop transitions, 112 changer transitions 0/825 dead transitions. [2024-06-21 17:39:28,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 825 transitions, 15369 flow [2024-06-21 17:39:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 17:39:28,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-21 17:39:28,990 INFO L175 Difference]: Start difference. First operand has 482 places, 786 transitions, 12657 flow. Second operand 8 states and 165 transitions. [2024-06-21 17:39:28,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 825 transitions, 15369 flow [2024-06-21 17:39:34,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 825 transitions, 15123 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:39:34,426 INFO L231 Difference]: Finished difference. Result has 484 places, 793 transitions, 12869 flow [2024-06-21 17:39:34,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12425, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12869, PETRI_PLACES=484, PETRI_TRANSITIONS=793} [2024-06-21 17:39:34,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-21 17:39:34,427 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 793 transitions, 12869 flow [2024-06-21 17:39:34,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:34,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:34,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:34,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:39:34,428 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:34,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:34,428 INFO L85 PathProgramCache]: Analyzing trace with hash 517901529, now seen corresponding path program 14 times [2024-06-21 17:39:34,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:34,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869106828] [2024-06-21 17:39:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:34,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:35,157 INFO 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 17:39:35,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:35,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869106828] [2024-06-21 17:39:35,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869106828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:35,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:35,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:35,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767623332] [2024-06-21 17:39:35,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:35,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:35,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:35,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:35,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:35,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:39:35,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 793 transitions, 12869 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:35,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:35,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:39:35,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:38,201 INFO L124 PetriNetUnfolderBase]: 5580/8929 cut-off events. [2024-06-21 17:39:38,201 INFO L125 PetriNetUnfolderBase]: For 1118831/1118831 co-relation queries the response was YES. [2024-06-21 17:39:38,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86088 conditions, 8929 events. 5580/8929 cut-off events. For 1118831/1118831 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 60080 event pairs, 982 based on Foata normal form. 4/8926 useless extension candidates. Maximal degree in co-relation 85862. Up to 8242 conditions per place. [2024-06-21 17:39:38,485 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 715 selfloop transitions, 114 changer transitions 0/834 dead transitions. [2024-06-21 17:39:38,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 834 transitions, 15667 flow [2024-06-21 17:39:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 17:39:38,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-21 17:39:38,486 INFO L175 Difference]: Start difference. First operand has 484 places, 793 transitions, 12869 flow. Second operand 8 states and 166 transitions. [2024-06-21 17:39:38,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 834 transitions, 15667 flow [2024-06-21 17:39:43,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 834 transitions, 15312 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-21 17:39:43,553 INFO L231 Difference]: Finished difference. Result has 489 places, 803 transitions, 13075 flow [2024-06-21 17:39:43,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12526, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13075, PETRI_PLACES=489, PETRI_TRANSITIONS=803} [2024-06-21 17:39:43,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-21 17:39:43,564 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 803 transitions, 13075 flow [2024-06-21 17:39:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:43,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:43,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:43,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:39:43,565 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:43,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash -307493715, now seen corresponding path program 1 times [2024-06-21 17:39:43,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:43,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541374977] [2024-06-21 17:39:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:43,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:44,303 INFO 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 17:39:44,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:44,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541374977] [2024-06-21 17:39:44,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541374977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:44,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:44,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:44,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084700389] [2024-06-21 17:39:44,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:44,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:44,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:39:44,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 803 transitions, 13075 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:44,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:44,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:39:44,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:47,313 INFO L124 PetriNetUnfolderBase]: 5582/8951 cut-off events. [2024-06-21 17:39:47,313 INFO L125 PetriNetUnfolderBase]: For 1111035/1111035 co-relation queries the response was YES. [2024-06-21 17:39:47,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86106 conditions, 8951 events. 5582/8951 cut-off events. For 1111035/1111035 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 60394 event pairs, 1008 based on Foata normal form. 2/8951 useless extension candidates. Maximal degree in co-relation 85877. Up to 8335 conditions per place. [2024-06-21 17:39:47,650 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 726 selfloop transitions, 92 changer transitions 0/823 dead transitions. [2024-06-21 17:39:47,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 823 transitions, 14897 flow [2024-06-21 17:39:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:39:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:39:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 17:39:47,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 17:39:47,651 INFO L175 Difference]: Start difference. First operand has 489 places, 803 transitions, 13075 flow. Second operand 6 states and 126 transitions. [2024-06-21 17:39:47,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 823 transitions, 14897 flow [2024-06-21 17:39:52,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 823 transitions, 14631 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-21 17:39:52,873 INFO L231 Difference]: Finished difference. Result has 492 places, 806 transitions, 13178 flow [2024-06-21 17:39:52,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12809, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13178, PETRI_PLACES=492, PETRI_TRANSITIONS=806} [2024-06-21 17:39:52,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-21 17:39:52,889 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 806 transitions, 13178 flow [2024-06-21 17:39:52,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:52,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:52,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:52,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 17:39:52,890 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:52,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash 155868555, now seen corresponding path program 2 times [2024-06-21 17:39:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:52,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532343027] [2024-06-21 17:39:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:52,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:53,600 INFO 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 17:39:53,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:53,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532343027] [2024-06-21 17:39:53,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532343027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:53,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:53,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:53,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960226452] [2024-06-21 17:39:53,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:53,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:53,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:53,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:53,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:53,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:39:53,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 806 transitions, 13178 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:53,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:53,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:39:53,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:56,664 INFO L124 PetriNetUnfolderBase]: 5576/8939 cut-off events. [2024-06-21 17:39:56,665 INFO L125 PetriNetUnfolderBase]: For 1117753/1117753 co-relation queries the response was YES. [2024-06-21 17:39:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86181 conditions, 8939 events. 5576/8939 cut-off events. For 1117753/1117753 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 60205 event pairs, 934 based on Foata normal form. 2/8930 useless extension candidates. Maximal degree in co-relation 85951. Up to 8120 conditions per place. [2024-06-21 17:39:56,842 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 677 selfloop transitions, 143 changer transitions 0/825 dead transitions. [2024-06-21 17:39:56,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 825 transitions, 15018 flow [2024-06-21 17:39:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:39:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:39:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 17:39:56,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-21 17:39:56,843 INFO L175 Difference]: Start difference. First operand has 492 places, 806 transitions, 13178 flow. Second operand 6 states and 124 transitions. [2024-06-21 17:39:56,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 825 transitions, 15018 flow [2024-06-21 17:40:01,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 825 transitions, 14755 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 17:40:01,677 INFO L231 Difference]: Finished difference. Result has 493 places, 809 transitions, 13367 flow [2024-06-21 17:40:01,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12915, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13367, PETRI_PLACES=493, PETRI_TRANSITIONS=809} [2024-06-21 17:40:01,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-21 17:40:01,678 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 809 transitions, 13367 flow [2024-06-21 17:40:01,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:01,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:01,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:01,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 17:40:01,679 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:01,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1921111880, now seen corresponding path program 1 times [2024-06-21 17:40:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998172136] [2024-06-21 17:40:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:01,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:02,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998172136] [2024-06-21 17:40:02,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998172136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:02,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:02,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474507533] [2024-06-21 17:40:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:02,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:02,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:02,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:40:02,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 809 transitions, 13367 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:02,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:02,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:40:02,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:06,126 INFO L124 PetriNetUnfolderBase]: 5819/9337 cut-off events. [2024-06-21 17:40:06,126 INFO L125 PetriNetUnfolderBase]: For 1460410/1460410 co-relation queries the response was YES. [2024-06-21 17:40:06,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94552 conditions, 9337 events. 5819/9337 cut-off events. For 1460410/1460410 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 63412 event pairs, 869 based on Foata normal form. 16/9346 useless extension candidates. Maximal degree in co-relation 94322. Up to 7291 conditions per place. [2024-06-21 17:40:06,296 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 661 selfloop transitions, 195 changer transitions 0/861 dead transitions. [2024-06-21 17:40:06,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 861 transitions, 16272 flow [2024-06-21 17:40:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:40:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:40:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 17:40:06,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-21 17:40:06,297 INFO L175 Difference]: Start difference. First operand has 493 places, 809 transitions, 13367 flow. Second operand 9 states and 183 transitions. [2024-06-21 17:40:06,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 861 transitions, 16272 flow [2024-06-21 17:40:11,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 861 transitions, 15876 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 17:40:11,623 INFO L231 Difference]: Finished difference. Result has 499 places, 818 transitions, 13759 flow [2024-06-21 17:40:11,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12971, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13759, PETRI_PLACES=499, PETRI_TRANSITIONS=818} [2024-06-21 17:40:11,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-21 17:40:11,641 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 818 transitions, 13759 flow [2024-06-21 17:40:11,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:11,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:11,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:11,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 17:40:11,641 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:11,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1922985830, now seen corresponding path program 2 times [2024-06-21 17:40:11,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:11,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047405181] [2024-06-21 17:40:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:11,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047405181] [2024-06-21 17:40:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047405181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:12,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:12,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805638840] [2024-06-21 17:40:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:12,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:40:12,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 818 transitions, 13759 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:12,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:12,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:40:12,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:16,681 INFO L124 PetriNetUnfolderBase]: 6499/10398 cut-off events. [2024-06-21 17:40:16,681 INFO L125 PetriNetUnfolderBase]: For 2436124/2436124 co-relation queries the response was YES. [2024-06-21 17:40:16,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117065 conditions, 10398 events. 6499/10398 cut-off events. For 2436124/2436124 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 70767 event pairs, 1143 based on Foata normal form. 56/10447 useless extension candidates. Maximal degree in co-relation 116832. Up to 7377 conditions per place. [2024-06-21 17:40:16,873 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 500 selfloop transitions, 365 changer transitions 0/870 dead transitions. [2024-06-21 17:40:16,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 870 transitions, 16969 flow [2024-06-21 17:40:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:40:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:40:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-21 17:40:16,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-21 17:40:16,874 INFO L175 Difference]: Start difference. First operand has 499 places, 818 transitions, 13759 flow. Second operand 11 states and 227 transitions. [2024-06-21 17:40:16,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 870 transitions, 16969 flow [2024-06-21 17:40:24,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 870 transitions, 16808 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-21 17:40:24,685 INFO L231 Difference]: Finished difference. Result has 508 places, 822 transitions, 14536 flow [2024-06-21 17:40:24,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13598, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14536, PETRI_PLACES=508, PETRI_TRANSITIONS=822} [2024-06-21 17:40:24,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-21 17:40:24,686 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 822 transitions, 14536 flow [2024-06-21 17:40:24,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:24,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:24,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:24,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 17:40:24,686 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:24,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:24,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1922989550, now seen corresponding path program 3 times [2024-06-21 17:40:24,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:24,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417572897] [2024-06-21 17:40:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:24,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:25,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:25,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417572897] [2024-06-21 17:40:25,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417572897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:25,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:25,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:25,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65057680] [2024-06-21 17:40:25,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:25,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:25,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:40:25,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 822 transitions, 14536 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:25,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:25,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:40:25,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:29,716 INFO L124 PetriNetUnfolderBase]: 6649/10660 cut-off events. [2024-06-21 17:40:29,716 INFO L125 PetriNetUnfolderBase]: For 2468033/2468033 co-relation queries the response was YES. [2024-06-21 17:40:29,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118853 conditions, 10660 events. 6649/10660 cut-off events. For 2468033/2468033 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 72711 event pairs, 1356 based on Foata normal form. 70/10723 useless extension candidates. Maximal degree in co-relation 118617. Up to 8427 conditions per place. [2024-06-21 17:40:30,152 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 465 selfloop transitions, 377 changer transitions 17/864 dead transitions. [2024-06-21 17:40:30,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 864 transitions, 16959 flow [2024-06-21 17:40:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:40:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:40:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-21 17:40:30,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-21 17:40:30,153 INFO L175 Difference]: Start difference. First operand has 508 places, 822 transitions, 14536 flow. Second operand 12 states and 238 transitions. [2024-06-21 17:40:30,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 864 transitions, 16959 flow [2024-06-21 17:40:38,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 864 transitions, 16505 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:38,058 INFO L231 Difference]: Finished difference. Result has 515 places, 809 transitions, 14819 flow [2024-06-21 17:40:38,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14084, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14819, PETRI_PLACES=515, PETRI_TRANSITIONS=809} [2024-06-21 17:40:38,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-21 17:40:38,059 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 809 transitions, 14819 flow [2024-06-21 17:40:38,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:38,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:38,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 17:40:38,060 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:38,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash 747901664, now seen corresponding path program 4 times [2024-06-21 17:40:38,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:38,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945172026] [2024-06-21 17:40:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:39,084 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 17:40:39,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:39,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945172026] [2024-06-21 17:40:39,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945172026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:39,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:39,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:39,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206913858] [2024-06-21 17:40:39,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:39,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:39,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:39,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:39,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:39,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:40:39,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 809 transitions, 14819 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:39,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:39,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:40:39,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:43,576 INFO L124 PetriNetUnfolderBase]: 7213/11554 cut-off events. [2024-06-21 17:40:43,577 INFO L125 PetriNetUnfolderBase]: For 3152749/3152749 co-relation queries the response was YES. [2024-06-21 17:40:43,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141423 conditions, 11554 events. 7213/11554 cut-off events. For 3152749/3152749 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 79622 event pairs, 1524 based on Foata normal form. 56/11603 useless extension candidates. Maximal degree in co-relation 141184. Up to 9389 conditions per place. [2024-06-21 17:40:43,810 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 705 selfloop transitions, 152 changer transitions 0/862 dead transitions. [2024-06-21 17:40:43,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 862 transitions, 18150 flow [2024-06-21 17:40:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:40:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:40:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 17:40:43,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 17:40:43,811 INFO L175 Difference]: Start difference. First operand has 515 places, 809 transitions, 14819 flow. Second operand 10 states and 200 transitions. [2024-06-21 17:40:43,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 862 transitions, 18150 flow [2024-06-21 17:40:51,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 862 transitions, 17073 flow, removed 27 selfloop flow, removed 14 redundant places. [2024-06-21 17:40:51,757 INFO L231 Difference]: Finished difference. Result has 513 places, 822 transitions, 14672 flow [2024-06-21 17:40:51,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13769, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14672, PETRI_PLACES=513, PETRI_TRANSITIONS=822} [2024-06-21 17:40:51,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-21 17:40:51,758 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 822 transitions, 14672 flow [2024-06-21 17:40:51,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:51,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:51,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:51,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 17:40:51,758 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:51,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1294454626, now seen corresponding path program 1 times [2024-06-21 17:40:51,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:51,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133553846] [2024-06-21 17:40:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:51,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:52,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:52,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133553846] [2024-06-21 17:40:52,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133553846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:52,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:52,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:52,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734115414] [2024-06-21 17:40:52,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:52,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:52,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:52,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:40:52,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 822 transitions, 14672 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 17:40:52,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:52,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:40:52,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand