./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:10:36,930 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:10:36,984 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:10:36,987 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:10:36,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:10:37,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:10:37,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:10:37,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:10:37,021 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:10:37,024 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:10:37,024 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:10:37,024 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:10:37,025 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:10:37,026 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:10:37,026 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:10:37,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:10:37,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:10:37,027 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:10:37,027 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:10:37,027 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:10:37,028 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:10:37,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:10:37,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:10:37,028 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:10:37,028 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:10:37,029 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:10:37,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:10:37,029 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:10:37,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:10:37,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:10:37,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:10:37,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:10:37,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:10:37,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:10:37,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:10:37,031 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:10:37,032 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:10:37,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:10:37,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:10:37,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:10:37,032 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:10:37,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:10:37,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:10:37,033 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:10:37,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:10:37,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:10:37,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:10:37,284 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:10:37,285 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:10:37,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 20:10:37,451 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:10:37,451 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:10:37,453 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-27 20:10:38,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:10:38,759 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:10:38,760 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-27 20:10:38,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a745d24e/7a67b5a395154f85971de74201c2a9f9/FLAG3bda31c4d [2024-06-27 20:10:38,784 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a745d24e/7a67b5a395154f85971de74201c2a9f9 [2024-06-27 20:10:38,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:10:38,785 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:10:38,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:10:38,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:10:38,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:10:38,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:37" (1/2) ... [2024-06-27 20:10:38,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ec17d1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:38, skipping insertion in model container [2024-06-27 20:10:38,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:37" (1/2) ... [2024-06-27 20:10:38,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@274e287a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:38, skipping insertion in model container [2024-06-27 20:10:38,793 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:10:38" (2/2) ... [2024-06-27 20:10:38,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ec17d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:38, skipping insertion in model container [2024-06-27 20:10:38,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:10:38" (2/2) ... [2024-06-27 20:10:38,793 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:10:38,945 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:10:38,946 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 20:10:38,947 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 20:10:38,947 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 20:10:38,947 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:10:38,947 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-27 20:10:38,982 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:10:39,313 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:10:39,322 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:10:39,419 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:10:39,459 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:10:39,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39 WrapperNode [2024-06-27 20:10:39,460 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:10:39,461 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:10:39,461 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:10:39,461 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:10:39,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,478 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,501 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 134 [2024-06-27 20:10:39,501 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:10:39,502 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:10:39,502 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:10:39,502 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:10:39,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,513 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,524 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:10:39,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,547 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,548 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:10:39,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:10:39,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:10:39,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:10:39,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (1/1) ... [2024-06-27 20:10:39,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:10:39,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:10:39,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:10:39,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:10:39,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:10:39,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:10:39,602 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:10:39,602 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:10:39,602 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:10:39,602 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:10:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:10:39,603 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:10:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:10:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:10:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:10:39,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:10:39,604 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:10:39,692 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:10:39,694 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:10:40,001 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:10:40,003 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:10:40,201 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:10:40,202 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:10:40,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:10:40 BoogieIcfgContainer [2024-06-27 20:10:40,203 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:10:40,205 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:10:40,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:10:40,207 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:10:40,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:37" (1/4) ... [2024-06-27 20:10:40,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e38884 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:10:40, skipping insertion in model container [2024-06-27 20:10:40,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:10:38" (2/4) ... [2024-06-27 20:10:40,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e38884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:10:40, skipping insertion in model container [2024-06-27 20:10:40,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:39" (3/4) ... [2024-06-27 20:10:40,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e38884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:10:40, skipping insertion in model container [2024-06-27 20:10:40,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:10:40" (4/4) ... [2024-06-27 20:10:40,210 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-27 20:10:40,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:10:40,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:10:40,223 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:10:40,266 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:10:40,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 20:10:40,317 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 20:10:40,318 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:10:40,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:10:40,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 20:10:40,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 20:10:40,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:10:40,339 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;@6d1d69e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:10:40,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:10:40,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:10:40,344 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:10:40,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:10:40,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:40,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:10:40,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:40,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:40,351 INFO L85 PathProgramCache]: Analyzing trace with hash 383563503, now seen corresponding path program 1 times [2024-06-27 20:10:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:40,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25947750] [2024-06-27 20:10:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:41,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25947750] [2024-06-27 20:10:41,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25947750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:41,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:41,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:10:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951625103] [2024-06-27 20:10:41,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:41,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:10:41,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:41,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:10:41,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:10:41,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 20:10:41,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:41,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:41,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 20:10:41,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:41,807 INFO L124 PetriNetUnfolderBase]: 1659/2553 cut-off events. [2024-06-27 20:10:41,807 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 20:10:41,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5117 conditions, 2553 events. 1659/2553 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12730 event pairs, 1184 based on Foata normal form. 1/2510 useless extension candidates. Maximal degree in co-relation 5105. Up to 2465 conditions per place. [2024-06-27 20:10:41,825 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 20:10:41,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-27 20:10:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:10:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:10:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-27 20:10:41,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-27 20:10:41,837 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-27 20:10:41,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-27 20:10:41,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:41,845 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 20:10:41,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 20:10:41,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 20:10:41,853 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 20:10:41,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:41,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:41,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:41,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:10:41,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:41,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash -761845704, now seen corresponding path program 1 times [2024-06-27 20:10:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:41,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460723891] [2024-06-27 20:10:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:42,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:42,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460723891] [2024-06-27 20:10:42,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460723891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:42,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:42,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:10:42,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828605850] [2024-06-27 20:10:42,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:42,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:10:42,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:10:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:10:42,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 20:10:42,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:42,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:42,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 20:10:42,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:42,947 INFO L124 PetriNetUnfolderBase]: 1653/2544 cut-off events. [2024-06-27 20:10:42,947 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2024-06-27 20:10:42,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5733 conditions, 2544 events. 1653/2544 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12659 event pairs, 1038 based on Foata normal form. 3/2543 useless extension candidates. Maximal degree in co-relation 5721. Up to 2441 conditions per place. [2024-06-27 20:10:42,959 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 20:10:42,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-27 20:10:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:10:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:10:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 20:10:42,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-27 20:10:42,962 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-27 20:10:42,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-27 20:10:42,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:10:42,965 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 20:10:42,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 20:10:42,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 20:10:42,966 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 20:10:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:42,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:42,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:42,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:10:42,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:42,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2142379128, now seen corresponding path program 1 times [2024-06-27 20:10:42,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553636077] [2024-06-27 20:10:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:43,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:43,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553636077] [2024-06-27 20:10:43,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553636077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:43,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:43,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:10:43,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489820168] [2024-06-27 20:10:43,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:43,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:10:43,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:43,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:10:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:10:43,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:10:43,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:43,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:43,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:10:43,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:44,160 INFO L124 PetriNetUnfolderBase]: 1947/2973 cut-off events. [2024-06-27 20:10:44,160 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-27 20:10:44,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7386 conditions, 2973 events. 1947/2973 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14726 event pairs, 1135 based on Foata normal form. 3/2975 useless extension candidates. Maximal degree in co-relation 7372. Up to 2853 conditions per place. [2024-06-27 20:10:44,173 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-27 20:10:44,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 324 flow [2024-06-27 20:10:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:10:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:10:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 20:10:44,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-27 20:10:44,175 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 121 transitions. [2024-06-27 20:10:44,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 324 flow [2024-06-27 20:10:44,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:10:44,178 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-27 20:10:44,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 20:10:44,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-27 20:10:44,179 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-27 20:10:44,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:44,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:44,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:10:44,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:44,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1557673005, now seen corresponding path program 1 times [2024-06-27 20:10:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:44,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966611119] [2024-06-27 20:10:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:44,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:45,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:45,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966611119] [2024-06-27 20:10:45,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966611119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:45,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:45,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:10:45,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047133234] [2024-06-27 20:10:45,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:45,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:10:45,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:10:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:10:45,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:10:45,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:45,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:45,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:10:45,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:45,678 INFO L124 PetriNetUnfolderBase]: 1941/2940 cut-off events. [2024-06-27 20:10:45,678 INFO L125 PetriNetUnfolderBase]: For 2827/2827 co-relation queries the response was YES. [2024-06-27 20:10:45,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8025 conditions, 2940 events. 1941/2940 cut-off events. For 2827/2827 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14459 event pairs, 989 based on Foata normal form. 3/2942 useless extension candidates. Maximal degree in co-relation 8010. Up to 2829 conditions per place. [2024-06-27 20:10:45,690 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-27 20:10:45,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 402 flow [2024-06-27 20:10:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 20:10:45,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542635658914729 [2024-06-27 20:10:45,692 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 143 transitions. [2024-06-27 20:10:45,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 402 flow [2024-06-27 20:10:45,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:45,694 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-27 20:10:45,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-27 20:10:45,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 20:10:45,695 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-27 20:10:45,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:45,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:45,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:45,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:10:45,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:45,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:45,697 INFO L85 PathProgramCache]: Analyzing trace with hash 350751750, now seen corresponding path program 1 times [2024-06-27 20:10:45,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:45,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909866290] [2024-06-27 20:10:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:45,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:46,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909866290] [2024-06-27 20:10:46,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909866290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:46,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:46,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:10:46,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676494624] [2024-06-27 20:10:46,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:46,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:10:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:10:46,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:10:46,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:10:46,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:46,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:46,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:10:46,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:46,742 INFO L124 PetriNetUnfolderBase]: 2135/3307 cut-off events. [2024-06-27 20:10:46,742 INFO L125 PetriNetUnfolderBase]: For 4911/4911 co-relation queries the response was YES. [2024-06-27 20:10:46,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9575 conditions, 3307 events. 2135/3307 cut-off events. For 4911/4911 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16535 event pairs, 1193 based on Foata normal form. 2/3308 useless extension candidates. Maximal degree in co-relation 9558. Up to 3145 conditions per place. [2024-06-27 20:10:46,760 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 20:10:46,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 364 flow [2024-06-27 20:10:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:10:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:10:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-27 20:10:46,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:10:46,762 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 5 states and 98 transitions. [2024-06-27 20:10:46,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 364 flow [2024-06-27 20:10:46,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:46,765 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-27 20:10:46,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 20:10:46,766 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-27 20:10:46,766 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-27 20:10:46,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:46,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:46,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:46,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:10:46,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:46,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2019787572, now seen corresponding path program 1 times [2024-06-27 20:10:46,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:46,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88586962] [2024-06-27 20:10:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:46,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:48,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:48,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88586962] [2024-06-27 20:10:48,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88586962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:48,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:48,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:10:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674550769] [2024-06-27 20:10:48,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:48,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:10:48,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:10:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:10:48,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:10:48,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:48,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:48,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:10:48,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:48,675 INFO L124 PetriNetUnfolderBase]: 2224/3383 cut-off events. [2024-06-27 20:10:48,676 INFO L125 PetriNetUnfolderBase]: For 6864/6864 co-relation queries the response was YES. [2024-06-27 20:10:48,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10523 conditions, 3383 events. 2224/3383 cut-off events. For 6864/6864 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16491 event pairs, 922 based on Foata normal form. 3/3385 useless extension candidates. Maximal degree in co-relation 10505. Up to 3210 conditions per place. [2024-06-27 20:10:48,689 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 73 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2024-06-27 20:10:48,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 550 flow [2024-06-27 20:10:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 20:10:48,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2024-06-27 20:10:48,691 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 8 states and 180 transitions. [2024-06-27 20:10:48,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 550 flow [2024-06-27 20:10:48,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 97 transitions, 528 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:48,695 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 296 flow [2024-06-27 20:10:48,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-27 20:10:48,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-27 20:10:48,696 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 296 flow [2024-06-27 20:10:48,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:48,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:48,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:48,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:10:48,697 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:48,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:48,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2011595964, now seen corresponding path program 1 times [2024-06-27 20:10:48,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:48,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975991769] [2024-06-27 20:10:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:48,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:49,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:49,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975991769] [2024-06-27 20:10:49,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975991769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:49,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:49,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:49,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579015219] [2024-06-27 20:10:49,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:49,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:49,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:49,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:49,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:49,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:49,858 INFO L124 PetriNetUnfolderBase]: 2462/3681 cut-off events. [2024-06-27 20:10:49,858 INFO L125 PetriNetUnfolderBase]: For 10921/10921 co-relation queries the response was YES. [2024-06-27 20:10:49,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12494 conditions, 3681 events. 2462/3681 cut-off events. For 10921/10921 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17474 event pairs, 1038 based on Foata normal form. 6/3686 useless extension candidates. Maximal degree in co-relation 12474. Up to 3562 conditions per place. [2024-06-27 20:10:49,876 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 63 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2024-06-27 20:10:49,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 584 flow [2024-06-27 20:10:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 20:10:49,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 20:10:49,877 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 296 flow. Second operand 6 states and 118 transitions. [2024-06-27 20:10:49,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 584 flow [2024-06-27 20:10:49,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 85 transitions, 534 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:10:49,882 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 375 flow [2024-06-27 20:10:49,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2024-06-27 20:10:49,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-27 20:10:49,882 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 375 flow [2024-06-27 20:10:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:49,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:49,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:49,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:10:49,883 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:49,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1621469351, now seen corresponding path program 1 times [2024-06-27 20:10:49,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:49,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028823625] [2024-06-27 20:10:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:50,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:50,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028823625] [2024-06-27 20:10:50,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028823625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:50,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:50,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:50,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173056294] [2024-06-27 20:10:50,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:50,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:50,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:50,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:50,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:10:50,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:50,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:50,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:10:50,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:51,118 INFO L124 PetriNetUnfolderBase]: 2201/3425 cut-off events. [2024-06-27 20:10:51,119 INFO L125 PetriNetUnfolderBase]: For 13912/13930 co-relation queries the response was YES. [2024-06-27 20:10:51,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12668 conditions, 3425 events. 2201/3425 cut-off events. For 13912/13930 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17213 event pairs, 908 based on Foata normal form. 6/3416 useless extension candidates. Maximal degree in co-relation 12644. Up to 3190 conditions per place. [2024-06-27 20:10:51,136 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-06-27 20:10:51,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 671 flow [2024-06-27 20:10:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 20:10:51,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-27 20:10:51,139 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 375 flow. Second operand 6 states and 122 transitions. [2024-06-27 20:10:51,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 671 flow [2024-06-27 20:10:51,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 653 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 20:10:51,145 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 455 flow [2024-06-27 20:10:51,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-06-27 20:10:51,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-27 20:10:51,148 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 455 flow [2024-06-27 20:10:51,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:51,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:51,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:51,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:10:51,149 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:51,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 443227014, now seen corresponding path program 1 times [2024-06-27 20:10:51,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:51,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884920021] [2024-06-27 20:10:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884920021] [2024-06-27 20:10:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884920021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:52,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:52,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:10:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565516157] [2024-06-27 20:10:52,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:52,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:10:52,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:10:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:10:52,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:10:52,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 455 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:52,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:52,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:10:52,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:53,488 INFO L124 PetriNetUnfolderBase]: 2305/3504 cut-off events. [2024-06-27 20:10:53,489 INFO L125 PetriNetUnfolderBase]: For 17078/17092 co-relation queries the response was YES. [2024-06-27 20:10:53,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13643 conditions, 3504 events. 2305/3504 cut-off events. For 17078/17092 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17123 event pairs, 743 based on Foata normal form. 6/3481 useless extension candidates. Maximal degree in co-relation 13617. Up to 3276 conditions per place. [2024-06-27 20:10:53,507 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 91 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-27 20:10:53,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 819 flow [2024-06-27 20:10:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 20:10:53,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5090439276485789 [2024-06-27 20:10:53,509 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 455 flow. Second operand 9 states and 197 transitions. [2024-06-27 20:10:53,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 819 flow [2024-06-27 20:10:53,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 789 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 20:10:53,519 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 498 flow [2024-06-27 20:10:53,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-06-27 20:10:53,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-27 20:10:53,520 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 498 flow [2024-06-27 20:10:53,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:53,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:53,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:53,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:10:53,521 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:53,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1621736261, now seen corresponding path program 2 times [2024-06-27 20:10:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:53,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077638292] [2024-06-27 20:10:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:53,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:54,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:54,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077638292] [2024-06-27 20:10:54,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077638292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:54,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:54,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008168821] [2024-06-27 20:10:54,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:54,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:54,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:54,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:54,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:10:54,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 498 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:54,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:54,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:10:54,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:54,664 INFO L124 PetriNetUnfolderBase]: 2199/3396 cut-off events. [2024-06-27 20:10:54,664 INFO L125 PetriNetUnfolderBase]: For 20682/20696 co-relation queries the response was YES. [2024-06-27 20:10:54,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13888 conditions, 3396 events. 2199/3396 cut-off events. For 20682/20696 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17006 event pairs, 868 based on Foata normal form. 2/3369 useless extension candidates. Maximal degree in co-relation 13860. Up to 3214 conditions per place. [2024-06-27 20:10:54,738 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 68 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-06-27 20:10:54,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 694 flow [2024-06-27 20:10:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 20:10:54,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:10:54,739 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 498 flow. Second operand 6 states and 114 transitions. [2024-06-27 20:10:54,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 694 flow [2024-06-27 20:10:54,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 613 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:54,748 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 447 flow [2024-06-27 20:10:54,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=447, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-27 20:10:54,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-27 20:10:54,749 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 447 flow [2024-06-27 20:10:54,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:54,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:54,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:54,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:10:54,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:54,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1502136885, now seen corresponding path program 1 times [2024-06-27 20:10:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059987050] [2024-06-27 20:10:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:54,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:55,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:55,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059987050] [2024-06-27 20:10:55,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059987050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:55,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:55,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:10:55,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800476740] [2024-06-27 20:10:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:55,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:10:55,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:55,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:10:55,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:10:55,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:55,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 447 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:55,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:55,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:55,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:55,991 INFO L124 PetriNetUnfolderBase]: 2313/3516 cut-off events. [2024-06-27 20:10:55,991 INFO L125 PetriNetUnfolderBase]: For 23827/23845 co-relation queries the response was YES. [2024-06-27 20:10:56,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14469 conditions, 3516 events. 2313/3516 cut-off events. For 23827/23845 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17225 event pairs, 854 based on Foata normal form. 6/3492 useless extension candidates. Maximal degree in co-relation 14439. Up to 3311 conditions per place. [2024-06-27 20:10:56,010 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 75 selfloop transitions, 24 changer transitions 0/106 dead transitions. [2024-06-27 20:10:56,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 817 flow [2024-06-27 20:10:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:10:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:10:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:10:56,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 20:10:56,012 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 447 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:10:56,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 817 flow [2024-06-27 20:10:56,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 106 transitions, 787 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 20:10:56,023 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 543 flow [2024-06-27 20:10:56,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-06-27 20:10:56,023 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-27 20:10:56,024 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 543 flow [2024-06-27 20:10:56,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:56,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:56,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:56,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:10:56,024 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:56,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1501957395, now seen corresponding path program 2 times [2024-06-27 20:10:56,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:56,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102649678] [2024-06-27 20:10:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:56,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:56,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:56,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102649678] [2024-06-27 20:10:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102649678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:56,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:56,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:10:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908680260] [2024-06-27 20:10:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:56,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:10:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:10:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:10:56,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:56,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 543 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:56,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:56,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:56,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:57,310 INFO L124 PetriNetUnfolderBase]: 2324/3532 cut-off events. [2024-06-27 20:10:57,311 INFO L125 PetriNetUnfolderBase]: For 28408/28426 co-relation queries the response was YES. [2024-06-27 20:10:57,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15309 conditions, 3532 events. 2324/3532 cut-off events. For 28408/28426 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17303 event pairs, 854 based on Foata normal form. 6/3508 useless extension candidates. Maximal degree in co-relation 15278. Up to 3323 conditions per place. [2024-06-27 20:10:57,326 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-06-27 20:10:57,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 106 transitions, 883 flow [2024-06-27 20:10:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:10:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:10:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:10:57,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-27 20:10:57,328 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 543 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:10:57,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 106 transitions, 883 flow [2024-06-27 20:10:57,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 827 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:57,343 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 585 flow [2024-06-27 20:10:57,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=585, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-27 20:10:57,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-27 20:10:57,344 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 585 flow [2024-06-27 20:10:57,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:57,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:57,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:57,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:10:57,345 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:57,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1501957147, now seen corresponding path program 1 times [2024-06-27 20:10:57,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:57,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197872583] [2024-06-27 20:10:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:58,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197872583] [2024-06-27 20:10:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197872583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:58,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:58,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:10:58,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481505157] [2024-06-27 20:10:58,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:58,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:10:58,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:10:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:10:58,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:58,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 585 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:58,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:58,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:58,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:58,692 INFO L124 PetriNetUnfolderBase]: 2559/3821 cut-off events. [2024-06-27 20:10:58,693 INFO L125 PetriNetUnfolderBase]: For 37394/37398 co-relation queries the response was YES. [2024-06-27 20:10:58,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17232 conditions, 3821 events. 2559/3821 cut-off events. For 37394/37398 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18227 event pairs, 918 based on Foata normal form. 7/3827 useless extension candidates. Maximal degree in co-relation 17199. Up to 3575 conditions per place. [2024-06-27 20:10:58,717 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 95 selfloop transitions, 28 changer transitions 0/131 dead transitions. [2024-06-27 20:10:58,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 131 transitions, 1151 flow [2024-06-27 20:10:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:10:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:10:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:10:58,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-27 20:10:58,718 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 585 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:10:58,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 131 transitions, 1151 flow [2024-06-27 20:10:58,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 131 transitions, 1095 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:58,740 INFO L231 Difference]: Finished difference. Result has 85 places, 99 transitions, 764 flow [2024-06-27 20:10:58,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=85, PETRI_TRANSITIONS=99} [2024-06-27 20:10:58,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-27 20:10:58,741 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 99 transitions, 764 flow [2024-06-27 20:10:58,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:58,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:58,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:58,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:10:58,742 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:58,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:58,742 INFO L85 PathProgramCache]: Analyzing trace with hash 62304267, now seen corresponding path program 3 times [2024-06-27 20:10:58,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:58,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736405419] [2024-06-27 20:10:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:58,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:59,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736405419] [2024-06-27 20:10:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736405419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:59,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:59,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:10:59,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782393016] [2024-06-27 20:10:59,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:59,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:10:59,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:10:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:10:59,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:59,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 99 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:59,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:59,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:59,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:59,961 INFO L124 PetriNetUnfolderBase]: 2433/3673 cut-off events. [2024-06-27 20:10:59,965 INFO L125 PetriNetUnfolderBase]: For 39608/39656 co-relation queries the response was YES. [2024-06-27 20:10:59,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17803 conditions, 3673 events. 2433/3673 cut-off events. For 39608/39656 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17824 event pairs, 822 based on Foata normal form. 2/3635 useless extension candidates. Maximal degree in co-relation 17766. Up to 3509 conditions per place. [2024-06-27 20:10:59,987 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 92 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2024-06-27 20:10:59,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 1024 flow [2024-06-27 20:10:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:10:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:10:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:10:59,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-27 20:10:59,997 INFO L175 Difference]: Start difference. First operand has 85 places, 99 transitions, 764 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:10:59,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 1024 flow [2024-06-27 20:11:00,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 966 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-27 20:11:00,022 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 742 flow [2024-06-27 20:11:00,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=742, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-27 20:11:00,023 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-27 20:11:00,023 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 742 flow [2024-06-27 20:11:00,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:00,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:00,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:00,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:11:00,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:00,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1265781787, now seen corresponding path program 2 times [2024-06-27 20:11:00,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:00,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200371303] [2024-06-27 20:11:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:00,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:00,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:00,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200371303] [2024-06-27 20:11:00,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200371303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:00,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:00,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:00,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65412467] [2024-06-27 20:11:00,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:00,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:00,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:00,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 742 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:00,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:00,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:00,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:01,435 INFO L124 PetriNetUnfolderBase]: 2592/3867 cut-off events. [2024-06-27 20:11:01,436 INFO L125 PetriNetUnfolderBase]: For 50168/50168 co-relation queries the response was YES. [2024-06-27 20:11:01,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19430 conditions, 3867 events. 2592/3867 cut-off events. For 50168/50168 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18405 event pairs, 937 based on Foata normal form. 6/3872 useless extension candidates. Maximal degree in co-relation 19390. Up to 3675 conditions per place. [2024-06-27 20:11:01,459 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 102 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-27 20:11:01,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 133 transitions, 1267 flow [2024-06-27 20:11:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:11:01,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 20:11:01,460 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 742 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:11:01,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 133 transitions, 1267 flow [2024-06-27 20:11:01,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 133 transitions, 1215 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:01,486 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 833 flow [2024-06-27 20:11:01,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=833, PETRI_PLACES=92, PETRI_TRANSITIONS=106} [2024-06-27 20:11:01,486 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-27 20:11:01,487 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 833 flow [2024-06-27 20:11:01,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:01,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:01,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:01,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:11:01,487 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:01,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:01,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1265485117, now seen corresponding path program 3 times [2024-06-27 20:11:01,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:01,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475238374] [2024-06-27 20:11:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:01,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:02,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475238374] [2024-06-27 20:11:02,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475238374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:02,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:02,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:02,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881092364] [2024-06-27 20:11:02,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:02,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:02,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:02,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:02,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:02,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:02,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 106 transitions, 833 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:02,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:02,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:02,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:02,736 INFO L124 PetriNetUnfolderBase]: 2596/3873 cut-off events. [2024-06-27 20:11:02,736 INFO L125 PetriNetUnfolderBase]: For 56944/56944 co-relation queries the response was YES. [2024-06-27 20:11:02,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20207 conditions, 3873 events. 2596/3873 cut-off events. For 56944/56944 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18463 event pairs, 938 based on Foata normal form. 6/3878 useless extension candidates. Maximal degree in co-relation 20165. Up to 3744 conditions per place. [2024-06-27 20:11:02,761 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 105 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-06-27 20:11:02,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 1268 flow [2024-06-27 20:11:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:11:02,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:11:02,763 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 833 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:11:02,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 1268 flow [2024-06-27 20:11:02,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 134 transitions, 1219 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:02,794 INFO L231 Difference]: Finished difference. Result has 97 places, 112 transitions, 918 flow [2024-06-27 20:11:02,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=918, PETRI_PLACES=97, PETRI_TRANSITIONS=112} [2024-06-27 20:11:02,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-27 20:11:02,795 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 112 transitions, 918 flow [2024-06-27 20:11:02,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:02,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:02,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:02,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:11:02,796 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:02,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1265474205, now seen corresponding path program 1 times [2024-06-27 20:11:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:02,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436477913] [2024-06-27 20:11:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:02,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:03,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:03,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436477913] [2024-06-27 20:11:03,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436477913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:03,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:03,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:03,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230664902] [2024-06-27 20:11:03,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:03,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:03,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:03,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:03,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 112 transitions, 918 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:03,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:03,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:03,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:04,401 INFO L124 PetriNetUnfolderBase]: 2598/3877 cut-off events. [2024-06-27 20:11:04,401 INFO L125 PetriNetUnfolderBase]: For 62334/62334 co-relation queries the response was YES. [2024-06-27 20:11:04,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20707 conditions, 3877 events. 2598/3877 cut-off events. For 62334/62334 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18491 event pairs, 915 based on Foata normal form. 6/3882 useless extension candidates. Maximal degree in co-relation 20663. Up to 3729 conditions per place. [2024-06-27 20:11:04,425 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 104 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2024-06-27 20:11:04,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 137 transitions, 1336 flow [2024-06-27 20:11:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:11:04,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-27 20:11:04,427 INFO L175 Difference]: Start difference. First operand has 97 places, 112 transitions, 918 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:11:04,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 137 transitions, 1336 flow [2024-06-27 20:11:04,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 137 transitions, 1277 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:04,454 INFO L231 Difference]: Finished difference. Result has 100 places, 115 transitions, 965 flow [2024-06-27 20:11:04,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=965, PETRI_PLACES=100, PETRI_TRANSITIONS=115} [2024-06-27 20:11:04,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-27 20:11:04,455 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 115 transitions, 965 flow [2024-06-27 20:11:04,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:04,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:04,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:04,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:11:04,456 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)] === [2024-06-27 20:11:04,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1898301283, now seen corresponding path program 1 times [2024-06-27 20:11:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:04,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809519289] [2024-06-27 20:11:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:04,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:05,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:05,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809519289] [2024-06-27 20:11:05,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809519289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:05,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:05,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:11:05,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217099359] [2024-06-27 20:11:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:05,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:11:05,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:11:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:11:05,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:05,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 115 transitions, 965 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:05,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:05,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:05,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:05,687 INFO L124 PetriNetUnfolderBase]: 2439/3719 cut-off events. [2024-06-27 20:11:05,687 INFO L125 PetriNetUnfolderBase]: For 70258/70271 co-relation queries the response was YES. [2024-06-27 20:11:05,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20803 conditions, 3719 events. 2439/3719 cut-off events. For 70258/70271 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18580 event pairs, 1364 based on Foata normal form. 14/3730 useless extension candidates. Maximal degree in co-relation 20758. Up to 3647 conditions per place. [2024-06-27 20:11:05,705 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 104 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2024-06-27 20:11:05,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 1228 flow [2024-06-27 20:11:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 20:11:05,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 20:11:05,707 INFO L175 Difference]: Start difference. First operand has 100 places, 115 transitions, 965 flow. Second operand 6 states and 104 transitions. [2024-06-27 20:11:05,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 1228 flow [2024-06-27 20:11:05,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 124 transitions, 1134 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:05,737 INFO L231 Difference]: Finished difference. Result has 102 places, 117 transitions, 919 flow [2024-06-27 20:11:05,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=919, PETRI_PLACES=102, PETRI_TRANSITIONS=117} [2024-06-27 20:11:05,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 20:11:05,738 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 117 transitions, 919 flow [2024-06-27 20:11:05,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:05,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:05,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:05,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:11:05,739 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:05,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2003300604, now seen corresponding path program 1 times [2024-06-27 20:11:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:05,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443274073] [2024-06-27 20:11:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:05,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:06,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:06,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443274073] [2024-06-27 20:11:06,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443274073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:06,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:06,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457017711] [2024-06-27 20:11:06,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:06,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:06,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:06,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:06,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:06,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:06,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 117 transitions, 919 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:06,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:06,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:06,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:07,256 INFO L124 PetriNetUnfolderBase]: 2588/3910 cut-off events. [2024-06-27 20:11:07,256 INFO L125 PetriNetUnfolderBase]: For 72932/72978 co-relation queries the response was YES. [2024-06-27 20:11:07,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21557 conditions, 3910 events. 2588/3910 cut-off events. For 72932/72978 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 19126 event pairs, 837 based on Foata normal form. 25/3907 useless extension candidates. Maximal degree in co-relation 21510. Up to 3540 conditions per place. [2024-06-27 20:11:07,280 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 116 selfloop transitions, 55 changer transitions 0/187 dead transitions. [2024-06-27 20:11:07,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1863 flow [2024-06-27 20:11:07,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:11:07,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 20:11:07,283 INFO L175 Difference]: Start difference. First operand has 102 places, 117 transitions, 919 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:11:07,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1863 flow [2024-06-27 20:11:07,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1838 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:07,329 INFO L231 Difference]: Finished difference. Result has 110 places, 147 transitions, 1358 flow [2024-06-27 20:11:07,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1358, PETRI_PLACES=110, PETRI_TRANSITIONS=147} [2024-06-27 20:11:07,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-27 20:11:07,330 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 147 transitions, 1358 flow [2024-06-27 20:11:07,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:07,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:07,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:11:07,331 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:07,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash -218308218, now seen corresponding path program 2 times [2024-06-27 20:11:07,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:07,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269068696] [2024-06-27 20:11:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:08,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:08,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269068696] [2024-06-27 20:11:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269068696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:08,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:08,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:08,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431231548] [2024-06-27 20:11:08,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:08,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:08,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:08,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:08,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:08,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 147 transitions, 1358 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:08,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:08,934 INFO L124 PetriNetUnfolderBase]: 2767/4177 cut-off events. [2024-06-27 20:11:08,934 INFO L125 PetriNetUnfolderBase]: For 84821/84859 co-relation queries the response was YES. [2024-06-27 20:11:08,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24448 conditions, 4177 events. 2767/4177 cut-off events. For 84821/84859 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20578 event pairs, 859 based on Foata normal form. 18/4167 useless extension candidates. Maximal degree in co-relation 24398. Up to 3672 conditions per place. [2024-06-27 20:11:08,963 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 124 selfloop transitions, 102 changer transitions 0/242 dead transitions. [2024-06-27 20:11:08,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 242 transitions, 2834 flow [2024-06-27 20:11:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:11:08,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 20:11:08,966 INFO L175 Difference]: Start difference. First operand has 110 places, 147 transitions, 1358 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:11:08,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 242 transitions, 2834 flow [2024-06-27 20:11:09,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 242 transitions, 2630 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:09,047 INFO L231 Difference]: Finished difference. Result has 120 places, 203 transitions, 2174 flow [2024-06-27 20:11:09,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2174, PETRI_PLACES=120, PETRI_TRANSITIONS=203} [2024-06-27 20:11:09,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-27 20:11:09,048 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 203 transitions, 2174 flow [2024-06-27 20:11:09,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:09,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:09,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:09,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:11:09,049 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:09,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash 190800714, now seen corresponding path program 3 times [2024-06-27 20:11:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:09,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270647422] [2024-06-27 20:11:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:09,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:09,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:09,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270647422] [2024-06-27 20:11:09,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270647422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:09,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:09,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:09,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137675648] [2024-06-27 20:11:09,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:09,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:09,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:09,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:09,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:09,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:09,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 203 transitions, 2174 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:09,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:09,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:09,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:10,506 INFO L124 PetriNetUnfolderBase]: 2872/4310 cut-off events. [2024-06-27 20:11:10,506 INFO L125 PetriNetUnfolderBase]: For 99878/99945 co-relation queries the response was YES. [2024-06-27 20:11:10,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26287 conditions, 4310 events. 2872/4310 cut-off events. For 99878/99945 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 21461 event pairs, 1142 based on Foata normal form. 23/4274 useless extension candidates. Maximal degree in co-relation 26231. Up to 3802 conditions per place. [2024-06-27 20:11:10,534 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 115 selfloop transitions, 131 changer transitions 0/262 dead transitions. [2024-06-27 20:11:10,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 262 transitions, 3195 flow [2024-06-27 20:11:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:11:10,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 20:11:10,536 INFO L175 Difference]: Start difference. First operand has 120 places, 203 transitions, 2174 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:11:10,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 262 transitions, 3195 flow [2024-06-27 20:11:10,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 262 transitions, 2981 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:10,612 INFO L231 Difference]: Finished difference. Result has 128 places, 227 transitions, 2627 flow [2024-06-27 20:11:10,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2627, PETRI_PLACES=128, PETRI_TRANSITIONS=227} [2024-06-27 20:11:10,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-27 20:11:10,613 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 227 transitions, 2627 flow [2024-06-27 20:11:10,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:10,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:10,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:10,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:11:10,613 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:10,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:10,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2003137854, now seen corresponding path program 4 times [2024-06-27 20:11:10,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:10,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490308536] [2024-06-27 20:11:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:10,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:11,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490308536] [2024-06-27 20:11:11,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490308536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:11,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:11,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:11,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920760823] [2024-06-27 20:11:11,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:11,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:11,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:11,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:11,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 227 transitions, 2627 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:11,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:11,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:11,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:12,147 INFO L124 PetriNetUnfolderBase]: 2889/4338 cut-off events. [2024-06-27 20:11:12,148 INFO L125 PetriNetUnfolderBase]: For 107580/107637 co-relation queries the response was YES. [2024-06-27 20:11:12,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27171 conditions, 4338 events. 2889/4338 cut-off events. For 107580/107637 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 21500 event pairs, 1134 based on Foata normal form. 17/4302 useless extension candidates. Maximal degree in co-relation 27112. Up to 3815 conditions per place. [2024-06-27 20:11:12,179 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 125 selfloop transitions, 133 changer transitions 0/274 dead transitions. [2024-06-27 20:11:12,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 274 transitions, 3595 flow [2024-06-27 20:11:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:11:12,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:11:12,181 INFO L175 Difference]: Start difference. First operand has 128 places, 227 transitions, 2627 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:11:12,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 274 transitions, 3595 flow [2024-06-27 20:11:12,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 274 transitions, 3365 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:12,283 INFO L231 Difference]: Finished difference. Result has 134 places, 240 transitions, 2963 flow [2024-06-27 20:11:12,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2963, PETRI_PLACES=134, PETRI_TRANSITIONS=240} [2024-06-27 20:11:12,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-27 20:11:12,284 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 240 transitions, 2963 flow [2024-06-27 20:11:12,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:12,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:12,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:12,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:11:12,285 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:12,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2017927427, now seen corresponding path program 1 times [2024-06-27 20:11:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:12,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075508910] [2024-06-27 20:11:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:12,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:12,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:12,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075508910] [2024-06-27 20:11:12,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075508910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:12,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:12,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:12,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409295706] [2024-06-27 20:11:12,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:12,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:12,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:12,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:12,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 240 transitions, 2963 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:12,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:12,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:12,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:13,829 INFO L124 PetriNetUnfolderBase]: 3169/4681 cut-off events. [2024-06-27 20:11:13,830 INFO L125 PetriNetUnfolderBase]: For 117619/117631 co-relation queries the response was YES. [2024-06-27 20:11:13,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29367 conditions, 4681 events. 3169/4681 cut-off events. For 117619/117631 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22577 event pairs, 1199 based on Foata normal form. 14/4694 useless extension candidates. Maximal degree in co-relation 29305. Up to 4147 conditions per place. [2024-06-27 20:11:13,867 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 240 selfloop transitions, 71 changer transitions 0/314 dead transitions. [2024-06-27 20:11:13,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 314 transitions, 4351 flow [2024-06-27 20:11:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:11:13,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:11:13,870 INFO L175 Difference]: Start difference. First operand has 134 places, 240 transitions, 2963 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:11:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 314 transitions, 4351 flow [2024-06-27 20:11:14,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 314 transitions, 4091 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:14,014 INFO L231 Difference]: Finished difference. Result has 142 places, 267 transitions, 3213 flow [2024-06-27 20:11:14,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3213, PETRI_PLACES=142, PETRI_TRANSITIONS=267} [2024-06-27 20:11:14,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 20:11:14,015 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 267 transitions, 3213 flow [2024-06-27 20:11:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:14,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:14,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:11:14,015 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:14,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash 230494189, now seen corresponding path program 2 times [2024-06-27 20:11:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487741956] [2024-06-27 20:11:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:14,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:14,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487741956] [2024-06-27 20:11:14,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487741956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:14,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:14,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:14,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837644761] [2024-06-27 20:11:14,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:14,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:14,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:14,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:14,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:14,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 267 transitions, 3213 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:14,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:14,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:14,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:15,719 INFO L124 PetriNetUnfolderBase]: 3583/5267 cut-off events. [2024-06-27 20:11:15,720 INFO L125 PetriNetUnfolderBase]: For 144410/144422 co-relation queries the response was YES. [2024-06-27 20:11:15,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35564 conditions, 5267 events. 3583/5267 cut-off events. For 144410/144422 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25899 event pairs, 1265 based on Foata normal form. 18/5284 useless extension candidates. Maximal degree in co-relation 35497. Up to 4431 conditions per place. [2024-06-27 20:11:15,765 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 267 selfloop transitions, 124 changer transitions 0/394 dead transitions. [2024-06-27 20:11:15,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 394 transitions, 5521 flow [2024-06-27 20:11:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:11:15,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 20:11:15,767 INFO L175 Difference]: Start difference. First operand has 142 places, 267 transitions, 3213 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:11:15,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 394 transitions, 5521 flow [2024-06-27 20:11:15,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 394 transitions, 5203 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:15,931 INFO L231 Difference]: Finished difference. Result has 151 places, 334 transitions, 4126 flow [2024-06-27 20:11:15,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4126, PETRI_PLACES=151, PETRI_TRANSITIONS=334} [2024-06-27 20:11:15,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-27 20:11:15,931 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 334 transitions, 4126 flow [2024-06-27 20:11:15,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:15,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:15,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:15,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:11:15,932 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:15,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash -480307586, now seen corresponding path program 5 times [2024-06-27 20:11:15,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:15,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596689245] [2024-06-27 20:11:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:15,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:16,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596689245] [2024-06-27 20:11:16,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596689245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:16,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:16,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148513972] [2024-06-27 20:11:16,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:16,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:16,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:16,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:16,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:16,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 334 transitions, 4126 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:16,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:16,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:16,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:17,752 INFO L124 PetriNetUnfolderBase]: 3395/5067 cut-off events. [2024-06-27 20:11:17,752 INFO L125 PetriNetUnfolderBase]: For 152863/152919 co-relation queries the response was YES. [2024-06-27 20:11:17,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36374 conditions, 5067 events. 3395/5067 cut-off events. For 152863/152919 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25422 event pairs, 896 based on Foata normal form. 20/5058 useless extension candidates. Maximal degree in co-relation 36303. Up to 4409 conditions per place. [2024-06-27 20:11:17,798 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 194 selfloop transitions, 139 changer transitions 0/378 dead transitions. [2024-06-27 20:11:17,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 378 transitions, 5353 flow [2024-06-27 20:11:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:11:17,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 20:11:17,802 INFO L175 Difference]: Start difference. First operand has 151 places, 334 transitions, 4126 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:11:17,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 378 transitions, 5353 flow [2024-06-27 20:11:18,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 378 transitions, 5206 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:18,041 INFO L231 Difference]: Finished difference. Result has 157 places, 343 transitions, 4450 flow [2024-06-27 20:11:18,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4450, PETRI_PLACES=157, PETRI_TRANSITIONS=343} [2024-06-27 20:11:18,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-27 20:11:18,042 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 343 transitions, 4450 flow [2024-06-27 20:11:18,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:18,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:18,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:18,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:11:18,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:18,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash -16259906, now seen corresponding path program 6 times [2024-06-27 20:11:18,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:18,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911559607] [2024-06-27 20:11:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:18,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:18,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:18,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911559607] [2024-06-27 20:11:18,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911559607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:18,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:18,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:18,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154190546] [2024-06-27 20:11:18,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:18,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:18,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:18,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:18,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 343 transitions, 4450 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:18,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:18,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:18,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:19,793 INFO L124 PetriNetUnfolderBase]: 3411/5089 cut-off events. [2024-06-27 20:11:19,794 INFO L125 PetriNetUnfolderBase]: For 160137/160183 co-relation queries the response was YES. [2024-06-27 20:11:19,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36568 conditions, 5089 events. 3411/5089 cut-off events. For 160137/160183 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 25461 event pairs, 889 based on Foata normal form. 18/5078 useless extension candidates. Maximal degree in co-relation 36496. Up to 4419 conditions per place. [2024-06-27 20:11:19,837 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 194 selfloop transitions, 148 changer transitions 0/387 dead transitions. [2024-06-27 20:11:19,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 387 transitions, 5610 flow [2024-06-27 20:11:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:11:19,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 20:11:19,838 INFO L175 Difference]: Start difference. First operand has 157 places, 343 transitions, 4450 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:11:19,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 387 transitions, 5610 flow [2024-06-27 20:11:20,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 387 transitions, 5310 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:20,039 INFO L231 Difference]: Finished difference. Result has 164 places, 353 transitions, 4752 flow [2024-06-27 20:11:20,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4752, PETRI_PLACES=164, PETRI_TRANSITIONS=353} [2024-06-27 20:11:20,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-27 20:11:20,040 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 353 transitions, 4752 flow [2024-06-27 20:11:20,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:20,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:20,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:20,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:11:20,040 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:20,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash -31453099, now seen corresponding path program 3 times [2024-06-27 20:11:20,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:20,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738415316] [2024-06-27 20:11:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:20,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:20,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:20,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738415316] [2024-06-27 20:11:20,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738415316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:20,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:20,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:20,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389184081] [2024-06-27 20:11:20,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:20,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:20,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:20,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:20,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:20,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:20,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 353 transitions, 4752 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:20,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:20,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:20,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:21,973 INFO L124 PetriNetUnfolderBase]: 3781/5553 cut-off events. [2024-06-27 20:11:21,974 INFO L125 PetriNetUnfolderBase]: For 185811/185825 co-relation queries the response was YES. [2024-06-27 20:11:22,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40529 conditions, 5553 events. 3781/5553 cut-off events. For 185811/185825 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27530 event pairs, 1266 based on Foata normal form. 20/5572 useless extension candidates. Maximal degree in co-relation 40453. Up to 4580 conditions per place. [2024-06-27 20:11:22,027 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 303 selfloop transitions, 138 changer transitions 0/444 dead transitions. [2024-06-27 20:11:22,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 444 transitions, 6824 flow [2024-06-27 20:11:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:11:22,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 20:11:22,029 INFO L175 Difference]: Start difference. First operand has 164 places, 353 transitions, 4752 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:11:22,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 444 transitions, 6824 flow [2024-06-27 20:11:22,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 444 transitions, 6580 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:22,327 INFO L231 Difference]: Finished difference. Result has 172 places, 381 transitions, 5268 flow [2024-06-27 20:11:22,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5268, PETRI_PLACES=172, PETRI_TRANSITIONS=381} [2024-06-27 20:11:22,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 20:11:22,328 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 381 transitions, 5268 flow [2024-06-27 20:11:22,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:22,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:22,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:22,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:11:22,329 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:22,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:22,329 INFO L85 PathProgramCache]: Analyzing trace with hash -474735739, now seen corresponding path program 4 times [2024-06-27 20:11:22,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:22,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404124118] [2024-06-27 20:11:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:22,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404124118] [2024-06-27 20:11:22,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404124118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:22,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:22,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:22,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843393328] [2024-06-27 20:11:22,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:22,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:22,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:23,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:23,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 381 transitions, 5268 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:23,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:23,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:23,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:24,085 INFO L124 PetriNetUnfolderBase]: 3779/5552 cut-off events. [2024-06-27 20:11:24,085 INFO L125 PetriNetUnfolderBase]: For 198968/198982 co-relation queries the response was YES. [2024-06-27 20:11:24,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41971 conditions, 5552 events. 3779/5552 cut-off events. For 198968/198982 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27553 event pairs, 1244 based on Foata normal form. 18/5569 useless extension candidates. Maximal degree in co-relation 41891. Up to 4586 conditions per place. [2024-06-27 20:11:24,141 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 289 selfloop transitions, 156 changer transitions 0/448 dead transitions. [2024-06-27 20:11:24,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 448 transitions, 6996 flow [2024-06-27 20:11:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:11:24,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 20:11:24,143 INFO L175 Difference]: Start difference. First operand has 172 places, 381 transitions, 5268 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:11:24,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 448 transitions, 6996 flow [2024-06-27 20:11:24,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 448 transitions, 6770 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:24,407 INFO L231 Difference]: Finished difference. Result has 178 places, 391 transitions, 5621 flow [2024-06-27 20:11:24,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5049, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5621, PETRI_PLACES=178, PETRI_TRANSITIONS=391} [2024-06-27 20:11:24,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-27 20:11:24,408 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 391 transitions, 5621 flow [2024-06-27 20:11:24,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:24,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:24,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:24,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:11:24,408 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:24,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:24,409 INFO L85 PathProgramCache]: Analyzing trace with hash 678248548, now seen corresponding path program 7 times [2024-06-27 20:11:24,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:24,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810095148] [2024-06-27 20:11:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:24,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:25,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:25,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810095148] [2024-06-27 20:11:25,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810095148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:25,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:25,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388929511] [2024-06-27 20:11:25,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:25,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:25,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:25,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:25,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:25,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 391 transitions, 5621 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:25,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:25,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:25,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:26,310 INFO L124 PetriNetUnfolderBase]: 3676/5448 cut-off events. [2024-06-27 20:11:26,310 INFO L125 PetriNetUnfolderBase]: For 218119/218205 co-relation queries the response was YES. [2024-06-27 20:11:26,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42482 conditions, 5448 events. 3676/5448 cut-off events. For 218119/218205 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 27717 event pairs, 1188 based on Foata normal form. 22/5405 useless extension candidates. Maximal degree in co-relation 42400. Up to 4752 conditions per place. [2024-06-27 20:11:26,360 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 206 selfloop transitions, 167 changer transitions 0/430 dead transitions. [2024-06-27 20:11:26,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 430 transitions, 6764 flow [2024-06-27 20:11:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:11:26,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:11:26,362 INFO L175 Difference]: Start difference. First operand has 178 places, 391 transitions, 5621 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:11:26,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 430 transitions, 6764 flow [2024-06-27 20:11:26,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 430 transitions, 6557 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:26,655 INFO L231 Difference]: Finished difference. Result has 182 places, 397 transitions, 5908 flow [2024-06-27 20:11:26,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5908, PETRI_PLACES=182, PETRI_TRANSITIONS=397} [2024-06-27 20:11:26,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-27 20:11:26,656 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 397 transitions, 5908 flow [2024-06-27 20:11:26,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:26,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:26,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:26,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:11:26,657 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:26,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1894809441, now seen corresponding path program 5 times [2024-06-27 20:11:26,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:26,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004986672] [2024-06-27 20:11:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:26,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:27,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:27,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004986672] [2024-06-27 20:11:27,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004986672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:27,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:27,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601925036] [2024-06-27 20:11:27,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:27,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:27,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:27,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:27,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:27,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 397 transitions, 5908 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:27,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:27,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:27,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:28,628 INFO L124 PetriNetUnfolderBase]: 3933/5771 cut-off events. [2024-06-27 20:11:28,629 INFO L125 PetriNetUnfolderBase]: For 231402/231414 co-relation queries the response was YES. [2024-06-27 20:11:28,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44821 conditions, 5771 events. 3933/5771 cut-off events. For 231402/231414 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28762 event pairs, 1276 based on Foata normal form. 18/5788 useless extension candidates. Maximal degree in co-relation 44738. Up to 4636 conditions per place. [2024-06-27 20:11:28,695 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 256 selfloop transitions, 204 changer transitions 0/463 dead transitions. [2024-06-27 20:11:28,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 463 transitions, 7710 flow [2024-06-27 20:11:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:11:28,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 20:11:28,697 INFO L175 Difference]: Start difference. First operand has 182 places, 397 transitions, 5908 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:11:28,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 463 transitions, 7710 flow [2024-06-27 20:11:29,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 463 transitions, 7349 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 20:11:29,111 INFO L231 Difference]: Finished difference. Result has 184 places, 419 transitions, 6462 flow [2024-06-27 20:11:29,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6462, PETRI_PLACES=184, PETRI_TRANSITIONS=419} [2024-06-27 20:11:29,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-27 20:11:29,111 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 419 transitions, 6462 flow [2024-06-27 20:11:29,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:29,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:29,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:29,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:11:29,112 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:29,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1043488450, now seen corresponding path program 8 times [2024-06-27 20:11:29,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:29,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383045724] [2024-06-27 20:11:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:29,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:29,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383045724] [2024-06-27 20:11:29,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383045724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:29,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:29,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51492752] [2024-06-27 20:11:29,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:29,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:29,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:29,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:29,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:29,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 419 transitions, 6462 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:29,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:29,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:29,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:30,857 INFO L124 PetriNetUnfolderBase]: 3789/5618 cut-off events. [2024-06-27 20:11:30,857 INFO L125 PetriNetUnfolderBase]: For 218725/218815 co-relation queries the response was YES. [2024-06-27 20:11:30,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45252 conditions, 5618 events. 3789/5618 cut-off events. For 218725/218815 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 28656 event pairs, 1193 based on Foata normal form. 19/5579 useless extension candidates. Maximal degree in co-relation 45169. Up to 4884 conditions per place. [2024-06-27 20:11:30,911 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 231 selfloop transitions, 168 changer transitions 0/463 dead transitions. [2024-06-27 20:11:30,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 463 transitions, 7788 flow [2024-06-27 20:11:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:11:30,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 20:11:30,913 INFO L175 Difference]: Start difference. First operand has 184 places, 419 transitions, 6462 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:11:30,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 463 transitions, 7788 flow [2024-06-27 20:11:31,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 463 transitions, 7577 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:31,303 INFO L231 Difference]: Finished difference. Result has 189 places, 428 transitions, 6827 flow [2024-06-27 20:11:31,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6827, PETRI_PLACES=189, PETRI_TRANSITIONS=428} [2024-06-27 20:11:31,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-27 20:11:31,304 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 428 transitions, 6827 flow [2024-06-27 20:11:31,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:31,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:31,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:31,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:11:31,304 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:31,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:31,305 INFO L85 PathProgramCache]: Analyzing trace with hash -841028817, now seen corresponding path program 6 times [2024-06-27 20:11:31,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:31,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771683550] [2024-06-27 20:11:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:31,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:32,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:32,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771683550] [2024-06-27 20:11:32,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771683550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:32,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:32,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822604493] [2024-06-27 20:11:32,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:32,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:32,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:32,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 428 transitions, 6827 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:32,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:32,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:32,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:33,103 INFO L124 PetriNetUnfolderBase]: 4228/6197 cut-off events. [2024-06-27 20:11:33,104 INFO L125 PetriNetUnfolderBase]: For 215168/215182 co-relation queries the response was YES. [2024-06-27 20:11:33,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48868 conditions, 6197 events. 4228/6197 cut-off events. For 215168/215182 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31243 event pairs, 1263 based on Foata normal form. 22/6218 useless extension candidates. Maximal degree in co-relation 48783. Up to 4888 conditions per place. [2024-06-27 20:11:33,169 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 282 selfloop transitions, 237 changer transitions 0/522 dead transitions. [2024-06-27 20:11:33,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 522 transitions, 9203 flow [2024-06-27 20:11:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:11:33,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:11:33,171 INFO L175 Difference]: Start difference. First operand has 189 places, 428 transitions, 6827 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:11:33,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 522 transitions, 9203 flow [2024-06-27 20:11:33,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 522 transitions, 8831 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:33,536 INFO L231 Difference]: Finished difference. Result has 192 places, 469 transitions, 7811 flow [2024-06-27 20:11:33,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6479, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7811, PETRI_PLACES=192, PETRI_TRANSITIONS=469} [2024-06-27 20:11:33,537 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-27 20:11:33,537 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 469 transitions, 7811 flow [2024-06-27 20:11:33,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:33,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:33,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:33,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:11:33,537 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:33,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1889245251, now seen corresponding path program 7 times [2024-06-27 20:11:33,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:33,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640254801] [2024-06-27 20:11:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:33,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:34,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:34,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640254801] [2024-06-27 20:11:34,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640254801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:34,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:34,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:34,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190717878] [2024-06-27 20:11:34,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:34,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:34,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:34,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:34,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 469 transitions, 7811 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:34,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:34,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:34,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:35,406 INFO L124 PetriNetUnfolderBase]: 4200/6159 cut-off events. [2024-06-27 20:11:35,407 INFO L125 PetriNetUnfolderBase]: For 209990/210004 co-relation queries the response was YES. [2024-06-27 20:11:35,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49807 conditions, 6159 events. 4200/6159 cut-off events. For 209990/210004 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 30988 event pairs, 1293 based on Foata normal form. 24/6182 useless extension candidates. Maximal degree in co-relation 49721. Up to 4876 conditions per place. [2024-06-27 20:11:35,476 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 297 selfloop transitions, 223 changer transitions 0/523 dead transitions. [2024-06-27 20:11:35,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 523 transitions, 9558 flow [2024-06-27 20:11:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:11:35,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 20:11:35,477 INFO L175 Difference]: Start difference. First operand has 192 places, 469 transitions, 7811 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:11:35,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 523 transitions, 9558 flow [2024-06-27 20:11:35,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 523 transitions, 9230 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:35,868 INFO L231 Difference]: Finished difference. Result has 197 places, 469 transitions, 7967 flow [2024-06-27 20:11:35,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7487, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7967, PETRI_PLACES=197, PETRI_TRANSITIONS=469} [2024-06-27 20:11:35,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-27 20:11:35,868 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 469 transitions, 7967 flow [2024-06-27 20:11:35,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:35,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:35,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:35,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:11:35,869 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:35,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:35,869 INFO L85 PathProgramCache]: Analyzing trace with hash 683962468, now seen corresponding path program 9 times [2024-06-27 20:11:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:35,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510526178] [2024-06-27 20:11:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:36,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:36,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510526178] [2024-06-27 20:11:36,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510526178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:36,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:36,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636412089] [2024-06-27 20:11:36,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:36,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:36,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:36,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:36,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 469 transitions, 7967 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:36,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:36,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:36,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:37,763 INFO L124 PetriNetUnfolderBase]: 3999/5944 cut-off events. [2024-06-27 20:11:37,763 INFO L125 PetriNetUnfolderBase]: For 207421/207468 co-relation queries the response was YES. [2024-06-27 20:11:37,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48066 conditions, 5944 events. 3999/5944 cut-off events. For 207421/207468 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30527 event pairs, 950 based on Foata normal form. 20/5935 useless extension candidates. Maximal degree in co-relation 47979. Up to 5130 conditions per place. [2024-06-27 20:11:37,825 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 260 selfloop transitions, 177 changer transitions 0/515 dead transitions. [2024-06-27 20:11:37,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 515 transitions, 9470 flow [2024-06-27 20:11:37,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:11:37,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:11:37,827 INFO L175 Difference]: Start difference. First operand has 197 places, 469 transitions, 7967 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:11:37,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 515 transitions, 9470 flow [2024-06-27 20:11:38,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 515 transitions, 8936 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 20:11:38,270 INFO L231 Difference]: Finished difference. Result has 197 places, 481 transitions, 8095 flow [2024-06-27 20:11:38,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8095, PETRI_PLACES=197, PETRI_TRANSITIONS=481} [2024-06-27 20:11:38,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-27 20:11:38,270 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 481 transitions, 8095 flow [2024-06-27 20:11:38,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:38,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:38,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:38,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:11:38,271 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:38,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1940964870, now seen corresponding path program 1 times [2024-06-27 20:11:38,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:38,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765603917] [2024-06-27 20:11:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:39,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:39,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765603917] [2024-06-27 20:11:39,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765603917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:39,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:39,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:39,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697400331] [2024-06-27 20:11:39,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:39,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:39,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:39,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:39,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 481 transitions, 8095 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:39,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:39,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:39,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:40,330 INFO L124 PetriNetUnfolderBase]: 4036/5976 cut-off events. [2024-06-27 20:11:40,331 INFO L125 PetriNetUnfolderBase]: For 211074/211131 co-relation queries the response was YES. [2024-06-27 20:11:40,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46878 conditions, 5976 events. 4036/5976 cut-off events. For 211074/211131 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 30560 event pairs, 1499 based on Foata normal form. 58/6007 useless extension candidates. Maximal degree in co-relation 46792. Up to 5420 conditions per place. [2024-06-27 20:11:40,385 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 403 selfloop transitions, 36 changer transitions 0/507 dead transitions. [2024-06-27 20:11:40,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 507 transitions, 9209 flow [2024-06-27 20:11:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:11:40,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-27 20:11:40,387 INFO L175 Difference]: Start difference. First operand has 197 places, 481 transitions, 8095 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:11:40,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 507 transitions, 9209 flow [2024-06-27 20:11:40,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 507 transitions, 8810 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:40,668 INFO L231 Difference]: Finished difference. Result has 198 places, 485 transitions, 7863 flow [2024-06-27 20:11:40,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7698, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7863, PETRI_PLACES=198, PETRI_TRANSITIONS=485} [2024-06-27 20:11:40,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-27 20:11:40,669 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 485 transitions, 7863 flow [2024-06-27 20:11:40,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:40,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:40,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:40,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:11:40,670 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:40,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash -584528307, now seen corresponding path program 8 times [2024-06-27 20:11:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:40,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860134768] [2024-06-27 20:11:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:41,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:41,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860134768] [2024-06-27 20:11:41,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860134768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:41,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:41,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:41,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668466629] [2024-06-27 20:11:41,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:41,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:41,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:41,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:41,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:41,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:41,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 485 transitions, 7863 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:41,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:41,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:41,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:42,596 INFO L124 PetriNetUnfolderBase]: 4432/6488 cut-off events. [2024-06-27 20:11:42,596 INFO L125 PetriNetUnfolderBase]: For 225361/225361 co-relation queries the response was YES. [2024-06-27 20:11:42,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51834 conditions, 6488 events. 4432/6488 cut-off events. For 225361/225361 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32758 event pairs, 1518 based on Foata normal form. 12/6499 useless extension candidates. Maximal degree in co-relation 51748. Up to 5935 conditions per place. [2024-06-27 20:11:42,660 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 478 selfloop transitions, 86 changer transitions 0/567 dead transitions. [2024-06-27 20:11:42,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 567 transitions, 10203 flow [2024-06-27 20:11:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:11:42,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:11:42,661 INFO L175 Difference]: Start difference. First operand has 198 places, 485 transitions, 7863 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:11:42,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 567 transitions, 10203 flow [2024-06-27 20:11:43,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 567 transitions, 10100 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:43,009 INFO L231 Difference]: Finished difference. Result has 203 places, 519 transitions, 8619 flow [2024-06-27 20:11:43,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8619, PETRI_PLACES=203, PETRI_TRANSITIONS=519} [2024-06-27 20:11:43,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-27 20:11:43,009 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 519 transitions, 8619 flow [2024-06-27 20:11:43,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:43,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:43,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:11:43,010 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:43,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash 885051718, now seen corresponding path program 10 times [2024-06-27 20:11:43,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:43,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406700150] [2024-06-27 20:11:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406700150] [2024-06-27 20:11:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406700150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:43,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:43,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:43,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603491531] [2024-06-27 20:11:43,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:43,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:43,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 519 transitions, 8619 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:43,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:43,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:43,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:44,903 INFO L124 PetriNetUnfolderBase]: 4254/6284 cut-off events. [2024-06-27 20:11:44,903 INFO L125 PetriNetUnfolderBase]: For 241730/241851 co-relation queries the response was YES. [2024-06-27 20:11:44,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51945 conditions, 6284 events. 4254/6284 cut-off events. For 241730/241851 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 32473 event pairs, 1426 based on Foata normal form. 30/6252 useless extension candidates. Maximal degree in co-relation 51856. Up to 5784 conditions per place. [2024-06-27 20:11:44,972 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 414 selfloop transitions, 36 changer transitions 0/541 dead transitions. [2024-06-27 20:11:44,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 541 transitions, 9647 flow [2024-06-27 20:11:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:11:44,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 20:11:44,973 INFO L175 Difference]: Start difference. First operand has 203 places, 519 transitions, 8619 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:11:44,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 541 transitions, 9647 flow [2024-06-27 20:11:45,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 541 transitions, 9439 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:45,407 INFO L231 Difference]: Finished difference. Result has 208 places, 519 transitions, 8502 flow [2024-06-27 20:11:45,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8411, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8502, PETRI_PLACES=208, PETRI_TRANSITIONS=519} [2024-06-27 20:11:45,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-27 20:11:45,408 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 519 transitions, 8502 flow [2024-06-27 20:11:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:45,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:45,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:45,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:11:45,408 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:45,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:45,409 INFO L85 PathProgramCache]: Analyzing trace with hash -584535747, now seen corresponding path program 9 times [2024-06-27 20:11:45,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:45,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828159080] [2024-06-27 20:11:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:45,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:46,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:46,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828159080] [2024-06-27 20:11:46,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828159080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:46,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:46,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:46,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364690555] [2024-06-27 20:11:46,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:46,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:46,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:46,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:46,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:46,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 519 transitions, 8502 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:46,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:46,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:46,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:47,272 INFO L124 PetriNetUnfolderBase]: 4390/6433 cut-off events. [2024-06-27 20:11:47,272 INFO L125 PetriNetUnfolderBase]: For 241230/241230 co-relation queries the response was YES. [2024-06-27 20:11:47,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52244 conditions, 6433 events. 4390/6433 cut-off events. For 241230/241230 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32516 event pairs, 1534 based on Foata normal form. 14/6446 useless extension candidates. Maximal degree in co-relation 52153. Up to 5904 conditions per place. [2024-06-27 20:11:47,340 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 465 selfloop transitions, 91 changer transitions 0/559 dead transitions. [2024-06-27 20:11:47,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 559 transitions, 10147 flow [2024-06-27 20:11:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:11:47,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 20:11:47,342 INFO L175 Difference]: Start difference. First operand has 208 places, 519 transitions, 8502 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:11:47,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 559 transitions, 10147 flow [2024-06-27 20:11:47,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 559 transitions, 9764 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-27 20:11:47,671 INFO L231 Difference]: Finished difference. Result has 207 places, 519 transitions, 8323 flow [2024-06-27 20:11:47,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8119, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8323, PETRI_PLACES=207, PETRI_TRANSITIONS=519} [2024-06-27 20:11:47,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-27 20:11:47,672 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 519 transitions, 8323 flow [2024-06-27 20:11:47,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:47,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:47,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:47,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:11:47,673 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:47,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash -575331537, now seen corresponding path program 10 times [2024-06-27 20:11:47,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:47,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165841871] [2024-06-27 20:11:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:47,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:48,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:48,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165841871] [2024-06-27 20:11:48,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165841871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:48,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:48,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260639335] [2024-06-27 20:11:48,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:48,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:48,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:48,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:48,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:48,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 519 transitions, 8323 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:48,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:48,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:48,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:49,468 INFO L124 PetriNetUnfolderBase]: 4382/6419 cut-off events. [2024-06-27 20:11:49,468 INFO L125 PetriNetUnfolderBase]: For 244460/244460 co-relation queries the response was YES. [2024-06-27 20:11:49,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52301 conditions, 6419 events. 4382/6419 cut-off events. For 244460/244460 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32360 event pairs, 1549 based on Foata normal form. 10/6428 useless extension candidates. Maximal degree in co-relation 52210. Up to 6236 conditions per place. [2024-06-27 20:11:49,535 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 519 selfloop transitions, 38 changer transitions 0/560 dead transitions. [2024-06-27 20:11:49,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 560 transitions, 9914 flow [2024-06-27 20:11:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:11:49,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 20:11:49,537 INFO L175 Difference]: Start difference. First operand has 207 places, 519 transitions, 8323 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:11:49,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 560 transitions, 9914 flow [2024-06-27 20:11:49,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 560 transitions, 9724 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:49,871 INFO L231 Difference]: Finished difference. Result has 208 places, 530 transitions, 8491 flow [2024-06-27 20:11:49,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8143, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8491, PETRI_PLACES=208, PETRI_TRANSITIONS=530} [2024-06-27 20:11:49,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-27 20:11:49,872 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 530 transitions, 8491 flow [2024-06-27 20:11:49,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:49,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:49,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:49,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:11:49,873 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:49,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1282201141, now seen corresponding path program 1 times [2024-06-27 20:11:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:49,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369778443] [2024-06-27 20:11:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:49,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369778443] [2024-06-27 20:11:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369778443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:50,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:50,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660277447] [2024-06-27 20:11:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:50,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:50,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 530 transitions, 8491 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:50,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:50,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:50,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:51,633 INFO L124 PetriNetUnfolderBase]: 3980/5986 cut-off events. [2024-06-27 20:11:51,634 INFO L125 PetriNetUnfolderBase]: For 246578/246627 co-relation queries the response was YES. [2024-06-27 20:11:51,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49050 conditions, 5986 events. 3980/5986 cut-off events. For 246578/246627 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 31300 event pairs, 1507 based on Foata normal form. 50/6022 useless extension candidates. Maximal degree in co-relation 48959. Up to 5358 conditions per place. [2024-06-27 20:11:51,701 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 406 selfloop transitions, 13 changer transitions 0/543 dead transitions. [2024-06-27 20:11:51,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 543 transitions, 9397 flow [2024-06-27 20:11:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:11:51,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-27 20:11:51,702 INFO L175 Difference]: Start difference. First operand has 208 places, 530 transitions, 8491 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:11:51,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 543 transitions, 9397 flow [2024-06-27 20:11:52,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 543 transitions, 9268 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:52,176 INFO L231 Difference]: Finished difference. Result has 209 places, 533 transitions, 8434 flow [2024-06-27 20:11:52,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8362, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8434, PETRI_PLACES=209, PETRI_TRANSITIONS=533} [2024-06-27 20:11:52,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-27 20:11:52,177 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 533 transitions, 8434 flow [2024-06-27 20:11:52,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:52,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:52,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:52,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:11:52,178 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:52,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash 607494704, now seen corresponding path program 1 times [2024-06-27 20:11:52,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:52,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502593746] [2024-06-27 20:11:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:52,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502593746] [2024-06-27 20:11:52,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502593746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:52,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:52,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:52,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744220471] [2024-06-27 20:11:52,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:52,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:52,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:52,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:52,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:52,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:52,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 533 transitions, 8434 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:52,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:52,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:52,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:54,303 INFO L124 PetriNetUnfolderBase]: 4230/6277 cut-off events. [2024-06-27 20:11:54,303 INFO L125 PetriNetUnfolderBase]: For 268208/268327 co-relation queries the response was YES. [2024-06-27 20:11:54,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51944 conditions, 6277 events. 4230/6277 cut-off events. For 268208/268327 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 32776 event pairs, 1243 based on Foata normal form. 15/6232 useless extension candidates. Maximal degree in co-relation 51852. Up to 5650 conditions per place. [2024-06-27 20:11:54,373 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 444 selfloop transitions, 63 changer transitions 0/600 dead transitions. [2024-06-27 20:11:54,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 600 transitions, 10162 flow [2024-06-27 20:11:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:11:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:11:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-27 20:11:54,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 20:11:54,375 INFO L175 Difference]: Start difference. First operand has 209 places, 533 transitions, 8434 flow. Second operand 12 states and 219 transitions. [2024-06-27 20:11:54,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 600 transitions, 10162 flow [2024-06-27 20:11:54,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 600 transitions, 10110 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:54,721 INFO L231 Difference]: Finished difference. Result has 218 places, 548 transitions, 8801 flow [2024-06-27 20:11:54,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8801, PETRI_PLACES=218, PETRI_TRANSITIONS=548} [2024-06-27 20:11:54,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 20:11:54,722 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 548 transitions, 8801 flow [2024-06-27 20:11:54,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:54,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:54,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:54,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:11:54,723 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:54,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2083169066, now seen corresponding path program 1 times [2024-06-27 20:11:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:54,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101416954] [2024-06-27 20:11:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:54,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:55,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101416954] [2024-06-27 20:11:55,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101416954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:55,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:55,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:55,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189362957] [2024-06-27 20:11:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:55,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:55,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:55,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:55,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:55,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:55,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 548 transitions, 8801 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:55,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:55,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:55,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:57,022 INFO L124 PetriNetUnfolderBase]: 4534/6633 cut-off events. [2024-06-27 20:11:57,023 INFO L125 PetriNetUnfolderBase]: For 286329/286341 co-relation queries the response was YES. [2024-06-27 20:11:57,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55612 conditions, 6633 events. 4534/6633 cut-off events. For 286329/286341 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 33855 event pairs, 1099 based on Foata normal form. 14/6646 useless extension candidates. Maximal degree in co-relation 55517. Up to 5070 conditions per place. [2024-06-27 20:11:57,093 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 446 selfloop transitions, 214 changer transitions 0/663 dead transitions. [2024-06-27 20:11:57,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 663 transitions, 11920 flow [2024-06-27 20:11:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:11:57,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 20:11:57,107 INFO L175 Difference]: Start difference. First operand has 218 places, 548 transitions, 8801 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:11:57,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 663 transitions, 11920 flow [2024-06-27 20:11:57,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 663 transitions, 11715 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:57,552 INFO L231 Difference]: Finished difference. Result has 226 places, 597 transitions, 10178 flow [2024-06-27 20:11:57,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8596, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10178, PETRI_PLACES=226, PETRI_TRANSITIONS=597} [2024-06-27 20:11:57,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 20:11:57,553 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 597 transitions, 10178 flow [2024-06-27 20:11:57,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:57,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:57,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:57,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:11:57,554 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:57,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1604946566, now seen corresponding path program 2 times [2024-06-27 20:11:57,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:57,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432820396] [2024-06-27 20:11:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:57,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:58,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:58,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432820396] [2024-06-27 20:11:58,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432820396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:58,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:58,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:58,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964508466] [2024-06-27 20:11:58,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:58,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:58,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:58,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:58,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:58,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:58,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 597 transitions, 10178 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:58,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:58,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:58,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:59,798 INFO L124 PetriNetUnfolderBase]: 4433/6553 cut-off events. [2024-06-27 20:11:59,799 INFO L125 PetriNetUnfolderBase]: For 319343/319462 co-relation queries the response was YES. [2024-06-27 20:11:59,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58580 conditions, 6553 events. 4433/6553 cut-off events. For 319343/319462 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34284 event pairs, 1247 based on Foata normal form. 16/6512 useless extension candidates. Maximal degree in co-relation 58479. Up to 5868 conditions per place. [2024-06-27 20:11:59,880 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 476 selfloop transitions, 68 changer transitions 0/655 dead transitions. [2024-06-27 20:11:59,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 655 transitions, 11703 flow [2024-06-27 20:11:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:11:59,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 20:11:59,882 INFO L175 Difference]: Start difference. First operand has 226 places, 597 transitions, 10178 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:11:59,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 655 transitions, 11703 flow [2024-06-27 20:12:00,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 655 transitions, 11499 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:00,371 INFO L231 Difference]: Finished difference. Result has 234 places, 616 transitions, 10398 flow [2024-06-27 20:12:00,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9982, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10398, PETRI_PLACES=234, PETRI_TRANSITIONS=616} [2024-06-27 20:12:00,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-27 20:12:00,372 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 616 transitions, 10398 flow [2024-06-27 20:12:00,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:00,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:00,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:00,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:12:00,372 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:00,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:00,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2083168880, now seen corresponding path program 3 times [2024-06-27 20:12:00,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:00,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96303882] [2024-06-27 20:12:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:00,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:00,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:00,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96303882] [2024-06-27 20:12:00,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96303882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:00,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:00,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:00,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261865592] [2024-06-27 20:12:00,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:00,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:00,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:00,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:00,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:01,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:01,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 616 transitions, 10398 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:01,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:01,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:01,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:02,463 INFO L124 PetriNetUnfolderBase]: 4501/6631 cut-off events. [2024-06-27 20:12:02,463 INFO L125 PetriNetUnfolderBase]: For 338279/338424 co-relation queries the response was YES. [2024-06-27 20:12:02,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59603 conditions, 6631 events. 4501/6631 cut-off events. For 338279/338424 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 34568 event pairs, 1167 based on Foata normal form. 19/6581 useless extension candidates. Maximal degree in co-relation 59499. Up to 5526 conditions per place. [2024-06-27 20:12:02,547 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 356 selfloop transitions, 199 changer transitions 0/666 dead transitions. [2024-06-27 20:12:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 666 transitions, 12155 flow [2024-06-27 20:12:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:12:02,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:12:02,549 INFO L175 Difference]: Start difference. First operand has 234 places, 616 transitions, 10398 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:12:02,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 666 transitions, 12155 flow [2024-06-27 20:12:02,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 666 transitions, 11992 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:02,982 INFO L231 Difference]: Finished difference. Result has 240 places, 627 transitions, 10991 flow [2024-06-27 20:12:02,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10235, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10991, PETRI_PLACES=240, PETRI_TRANSITIONS=627} [2024-06-27 20:12:02,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-27 20:12:02,983 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 627 transitions, 10991 flow [2024-06-27 20:12:02,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:02,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:02,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:02,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:12:02,984 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:02,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1863992364, now seen corresponding path program 4 times [2024-06-27 20:12:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:02,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548648343] [2024-06-27 20:12:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:02,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:03,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:03,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548648343] [2024-06-27 20:12:03,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548648343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:03,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:03,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:03,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745807048] [2024-06-27 20:12:03,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:03,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:03,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:03,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:03,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:03,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:03,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 627 transitions, 10991 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:03,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:03,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:03,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:05,205 INFO L124 PetriNetUnfolderBase]: 4488/6654 cut-off events. [2024-06-27 20:12:05,205 INFO L125 PetriNetUnfolderBase]: For 341755/341803 co-relation queries the response was YES. [2024-06-27 20:12:05,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60790 conditions, 6654 events. 4488/6654 cut-off events. For 341755/341803 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34800 event pairs, 1248 based on Foata normal form. 14/6638 useless extension candidates. Maximal degree in co-relation 60684. Up to 5935 conditions per place. [2024-06-27 20:12:05,300 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 495 selfloop transitions, 80 changer transitions 0/686 dead transitions. [2024-06-27 20:12:05,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 686 transitions, 12634 flow [2024-06-27 20:12:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:12:05,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 20:12:05,305 INFO L175 Difference]: Start difference. First operand has 240 places, 627 transitions, 10991 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:12:05,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 686 transitions, 12634 flow [2024-06-27 20:12:05,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 686 transitions, 12340 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:05,990 INFO L231 Difference]: Finished difference. Result has 245 places, 651 transitions, 11255 flow [2024-06-27 20:12:05,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10705, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11255, PETRI_PLACES=245, PETRI_TRANSITIONS=651} [2024-06-27 20:12:05,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-27 20:12:05,993 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 651 transitions, 11255 flow [2024-06-27 20:12:05,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:05,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:05,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:05,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:12:05,993 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:05,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:05,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2111303056, now seen corresponding path program 2 times [2024-06-27 20:12:05,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:05,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080471204] [2024-06-27 20:12:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:05,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:06,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:06,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080471204] [2024-06-27 20:12:06,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080471204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:06,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:06,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:06,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337596777] [2024-06-27 20:12:06,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:06,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:06,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:06,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:06,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 651 transitions, 11255 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:06,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:06,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:06,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:08,463 INFO L124 PetriNetUnfolderBase]: 4937/7218 cut-off events. [2024-06-27 20:12:08,464 INFO L125 PetriNetUnfolderBase]: For 382444/382456 co-relation queries the response was YES. [2024-06-27 20:12:08,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65503 conditions, 7218 events. 4937/7218 cut-off events. For 382444/382456 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 37508 event pairs, 1138 based on Foata normal form. 18/7235 useless extension candidates. Maximal degree in co-relation 65395. Up to 5255 conditions per place. [2024-06-27 20:12:08,565 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 497 selfloop transitions, 273 changer transitions 0/773 dead transitions. [2024-06-27 20:12:08,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 773 transitions, 14605 flow [2024-06-27 20:12:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 20:12:08,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 20:12:08,566 INFO L175 Difference]: Start difference. First operand has 245 places, 651 transitions, 11255 flow. Second operand 10 states and 204 transitions. [2024-06-27 20:12:08,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 773 transitions, 14605 flow [2024-06-27 20:12:09,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 773 transitions, 14397 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:09,087 INFO L231 Difference]: Finished difference. Result has 253 places, 689 transitions, 12213 flow [2024-06-27 20:12:09,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11047, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12213, PETRI_PLACES=253, PETRI_TRANSITIONS=689} [2024-06-27 20:12:09,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-27 20:12:09,088 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 689 transitions, 12213 flow [2024-06-27 20:12:09,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:09,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:09,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:09,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:12:09,088 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:09,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:09,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1864112334, now seen corresponding path program 5 times [2024-06-27 20:12:09,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:09,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207831476] [2024-06-27 20:12:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:09,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:09,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207831476] [2024-06-27 20:12:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207831476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:09,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:09,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:09,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310847258] [2024-06-27 20:12:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:09,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:09,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:09,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:09,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:09,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 689 transitions, 12213 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:09,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:09,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:09,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:11,492 INFO L124 PetriNetUnfolderBase]: 4801/7092 cut-off events. [2024-06-27 20:12:11,493 INFO L125 PetriNetUnfolderBase]: For 399154/399205 co-relation queries the response was YES. [2024-06-27 20:12:11,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67514 conditions, 7092 events. 4801/7092 cut-off events. For 399154/399205 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 37346 event pairs, 1143 based on Foata normal form. 20/7085 useless extension candidates. Maximal degree in co-relation 67403. Up to 5860 conditions per place. [2024-06-27 20:12:11,593 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 396 selfloop transitions, 227 changer transitions 0/745 dead transitions. [2024-06-27 20:12:11,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 745 transitions, 14300 flow [2024-06-27 20:12:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:12:11,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 20:12:11,595 INFO L175 Difference]: Start difference. First operand has 253 places, 689 transitions, 12213 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:12:11,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 745 transitions, 14300 flow [2024-06-27 20:12:12,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 745 transitions, 14037 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:12,256 INFO L231 Difference]: Finished difference. Result has 260 places, 706 transitions, 12790 flow [2024-06-27 20:12:12,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11950, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12790, PETRI_PLACES=260, PETRI_TRANSITIONS=706} [2024-06-27 20:12:12,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-27 20:12:12,257 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 706 transitions, 12790 flow [2024-06-27 20:12:12,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:12,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:12,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:12,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:12:12,258 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:12,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1863925086, now seen corresponding path program 3 times [2024-06-27 20:12:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:12,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388087904] [2024-06-27 20:12:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:12,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:12,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388087904] [2024-06-27 20:12:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388087904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:12,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:12,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022470337] [2024-06-27 20:12:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:12,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:12,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 706 transitions, 12790 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:12,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:12,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:12,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:14,797 INFO L124 PetriNetUnfolderBase]: 5096/7445 cut-off events. [2024-06-27 20:12:14,797 INFO L125 PetriNetUnfolderBase]: For 438107/438119 co-relation queries the response was YES. [2024-06-27 20:12:14,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70919 conditions, 7445 events. 5096/7445 cut-off events. For 438107/438119 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38841 event pairs, 1164 based on Foata normal form. 18/7462 useless extension candidates. Maximal degree in co-relation 70806. Up to 5415 conditions per place. [2024-06-27 20:12:14,897 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 551 selfloop transitions, 255 changer transitions 0/809 dead transitions. [2024-06-27 20:12:14,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 809 transitions, 16112 flow [2024-06-27 20:12:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 20:12:14,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-27 20:12:14,905 INFO L175 Difference]: Start difference. First operand has 260 places, 706 transitions, 12790 flow. Second operand 10 states and 203 transitions. [2024-06-27 20:12:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 809 transitions, 16112 flow [2024-06-27 20:12:15,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 809 transitions, 15764 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:15,664 INFO L231 Difference]: Finished difference. Result has 266 places, 723 transitions, 13233 flow [2024-06-27 20:12:15,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12442, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13233, PETRI_PLACES=266, PETRI_TRANSITIONS=723} [2024-06-27 20:12:15,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 20:12:15,665 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 723 transitions, 13233 flow [2024-06-27 20:12:15,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:15,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:15,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:15,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:12:15,666 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:15,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1868760660, now seen corresponding path program 4 times [2024-06-27 20:12:15,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:15,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538268143] [2024-06-27 20:12:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:15,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:16,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538268143] [2024-06-27 20:12:16,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538268143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:16,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:16,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:16,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979197523] [2024-06-27 20:12:16,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:16,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:16,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:16,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 723 transitions, 13233 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:16,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:16,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:16,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:18,173 INFO L124 PetriNetUnfolderBase]: 5094/7444 cut-off events. [2024-06-27 20:12:18,173 INFO L125 PetriNetUnfolderBase]: For 458351/458363 co-relation queries the response was YES. [2024-06-27 20:12:18,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72187 conditions, 7444 events. 5094/7444 cut-off events. For 458351/458363 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38861 event pairs, 1132 based on Foata normal form. 16/7459 useless extension candidates. Maximal degree in co-relation 72072. Up to 5421 conditions per place. [2024-06-27 20:12:18,279 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 535 selfloop transitions, 275 changer transitions 0/813 dead transitions. [2024-06-27 20:12:18,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 813 transitions, 16266 flow [2024-06-27 20:12:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 20:12:18,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-27 20:12:18,281 INFO L175 Difference]: Start difference. First operand has 266 places, 723 transitions, 13233 flow. Second operand 10 states and 201 transitions. [2024-06-27 20:12:18,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 813 transitions, 16266 flow [2024-06-27 20:12:18,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 813 transitions, 15790 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:18,996 INFO L231 Difference]: Finished difference. Result has 270 places, 731 transitions, 13473 flow [2024-06-27 20:12:18,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12764, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13473, PETRI_PLACES=270, PETRI_TRANSITIONS=731} [2024-06-27 20:12:18,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 20:12:18,997 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 731 transitions, 13473 flow [2024-06-27 20:12:18,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:18,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:18,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:18,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:12:18,997 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:18,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1982923252, now seen corresponding path program 6 times [2024-06-27 20:12:18,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:18,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021061243] [2024-06-27 20:12:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:18,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:19,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:19,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021061243] [2024-06-27 20:12:19,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021061243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:19,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:19,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:19,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898589844] [2024-06-27 20:12:19,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:19,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:19,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:19,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:19,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 731 transitions, 13473 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:19,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:19,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:19,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:21,519 INFO L124 PetriNetUnfolderBase]: 4905/7240 cut-off events. [2024-06-27 20:12:21,519 INFO L125 PetriNetUnfolderBase]: For 457628/457677 co-relation queries the response was YES. [2024-06-27 20:12:21,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70789 conditions, 7240 events. 4905/7240 cut-off events. For 457628/457677 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38198 event pairs, 1146 based on Foata normal form. 18/7231 useless extension candidates. Maximal degree in co-relation 70673. Up to 5987 conditions per place. [2024-06-27 20:12:21,614 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 412 selfloop transitions, 229 changer transitions 0/771 dead transitions. [2024-06-27 20:12:21,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 771 transitions, 15252 flow [2024-06-27 20:12:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:12:21,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 20:12:21,616 INFO L175 Difference]: Start difference. First operand has 270 places, 731 transitions, 13473 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:12:21,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 771 transitions, 15252 flow [2024-06-27 20:12:22,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 771 transitions, 14713 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:22,545 INFO L231 Difference]: Finished difference. Result has 273 places, 734 transitions, 13475 flow [2024-06-27 20:12:22,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12934, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13475, PETRI_PLACES=273, PETRI_TRANSITIONS=734} [2024-06-27 20:12:22,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-27 20:12:22,546 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 734 transitions, 13475 flow [2024-06-27 20:12:22,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:22,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:22,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:22,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:12:22,547 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:22,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:22,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1822261352, now seen corresponding path program 7 times [2024-06-27 20:12:22,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:22,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810446110] [2024-06-27 20:12:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:22,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:23,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810446110] [2024-06-27 20:12:23,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810446110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:23,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:23,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:23,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036619935] [2024-06-27 20:12:23,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:23,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:23,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:23,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:23,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:23,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 734 transitions, 13475 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:23,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:23,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:23,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:25,322 INFO L124 PetriNetUnfolderBase]: 4959/7336 cut-off events. [2024-06-27 20:12:25,322 INFO L125 PetriNetUnfolderBase]: For 466779/466816 co-relation queries the response was YES. [2024-06-27 20:12:25,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70878 conditions, 7336 events. 4959/7336 cut-off events. For 466779/466816 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38981 event pairs, 988 based on Foata normal form. 12/7335 useless extension candidates. Maximal degree in co-relation 70761. Up to 6512 conditions per place. [2024-06-27 20:12:25,422 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 571 selfloop transitions, 94 changer transitions 0/795 dead transitions. [2024-06-27 20:12:25,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 795 transitions, 15434 flow [2024-06-27 20:12:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:12:25,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 20:12:25,424 INFO L175 Difference]: Start difference. First operand has 273 places, 734 transitions, 13475 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:12:25,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 795 transitions, 15434 flow [2024-06-27 20:12:26,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 795 transitions, 14998 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:26,364 INFO L231 Difference]: Finished difference. Result has 278 places, 763 transitions, 13799 flow [2024-06-27 20:12:26,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13074, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13799, PETRI_PLACES=278, PETRI_TRANSITIONS=763} [2024-06-27 20:12:26,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-27 20:12:26,365 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 763 transitions, 13799 flow [2024-06-27 20:12:26,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:26,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:26,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:26,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:12:26,366 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:26,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:26,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2009273234, now seen corresponding path program 5 times [2024-06-27 20:12:26,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:26,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714995679] [2024-06-27 20:12:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:26,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:27,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:27,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714995679] [2024-06-27 20:12:27,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714995679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:27,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:27,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:27,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645969823] [2024-06-27 20:12:27,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:27,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:27,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:27,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:27,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 763 transitions, 13799 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:27,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:27,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:27,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:29,307 INFO L124 PetriNetUnfolderBase]: 5632/8201 cut-off events. [2024-06-27 20:12:29,307 INFO L125 PetriNetUnfolderBase]: For 537775/537787 co-relation queries the response was YES. [2024-06-27 20:12:29,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78984 conditions, 8201 events. 5632/8201 cut-off events. For 537775/537787 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43285 event pairs, 1046 based on Foata normal form. 18/8218 useless extension candidates. Maximal degree in co-relation 78865. Up to 5639 conditions per place. [2024-06-27 20:12:29,430 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 533 selfloop transitions, 391 changer transitions 0/927 dead transitions. [2024-06-27 20:12:29,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 927 transitions, 18087 flow [2024-06-27 20:12:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 20:12:29,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 20:12:29,431 INFO L175 Difference]: Start difference. First operand has 278 places, 763 transitions, 13799 flow. Second operand 10 states and 205 transitions. [2024-06-27 20:12:29,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 927 transitions, 18087 flow [2024-06-27 20:12:30,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 927 transitions, 17868 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:30,525 INFO L231 Difference]: Finished difference. Result has 287 places, 834 transitions, 15455 flow [2024-06-27 20:12:30,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13580, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15455, PETRI_PLACES=287, PETRI_TRANSITIONS=834} [2024-06-27 20:12:30,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-27 20:12:30,526 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 834 transitions, 15455 flow [2024-06-27 20:12:30,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:30,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:30,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:30,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:12:30,527 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:30,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2009273420, now seen corresponding path program 8 times [2024-06-27 20:12:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:30,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670817749] [2024-06-27 20:12:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:30,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:31,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:31,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670817749] [2024-06-27 20:12:31,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670817749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:31,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:31,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:31,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380235197] [2024-06-27 20:12:31,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:31,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:31,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:31,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 834 transitions, 15455 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:31,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:31,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:31,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:33,469 INFO L124 PetriNetUnfolderBase]: 5493/8090 cut-off events. [2024-06-27 20:12:33,470 INFO L125 PetriNetUnfolderBase]: For 566173/566216 co-relation queries the response was YES. [2024-06-27 20:12:33,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81338 conditions, 8090 events. 5493/8090 cut-off events. For 566173/566216 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 43564 event pairs, 997 based on Foata normal form. 18/8095 useless extension candidates. Maximal degree in co-relation 81216. Up to 6647 conditions per place. [2024-06-27 20:12:33,563 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 470 selfloop transitions, 274 changer transitions 0/897 dead transitions. [2024-06-27 20:12:33,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 897 transitions, 18001 flow [2024-06-27 20:12:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:12:33,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 20:12:33,564 INFO L175 Difference]: Start difference. First operand has 287 places, 834 transitions, 15455 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:12:33,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 897 transitions, 18001 flow [2024-06-27 20:12:34,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 897 transitions, 17650 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:34,490 INFO L231 Difference]: Finished difference. Result has 294 places, 860 transitions, 16182 flow [2024-06-27 20:12:34,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15104, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16182, PETRI_PLACES=294, PETRI_TRANSITIONS=860} [2024-06-27 20:12:34,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-27 20:12:34,491 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 860 transitions, 16182 flow [2024-06-27 20:12:34,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:34,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:34,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:34,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:12:34,492 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:34,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2004625094, now seen corresponding path program 6 times [2024-06-27 20:12:34,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:34,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353157244] [2024-06-27 20:12:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:34,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:35,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:35,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353157244] [2024-06-27 20:12:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353157244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:35,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:35,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:35,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125763060] [2024-06-27 20:12:35,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:35,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:35,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:35,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:35,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 860 transitions, 16182 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:35,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:35,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:35,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:37,605 INFO L124 PetriNetUnfolderBase]: 5977/8691 cut-off events. [2024-06-27 20:12:37,606 INFO L125 PetriNetUnfolderBase]: For 634263/634275 co-relation queries the response was YES. [2024-06-27 20:12:37,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88336 conditions, 8691 events. 5977/8691 cut-off events. For 634263/634275 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 46333 event pairs, 1042 based on Foata normal form. 20/8710 useless extension candidates. Maximal degree in co-relation 88212. Up to 5962 conditions per place. [2024-06-27 20:12:37,722 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 594 selfloop transitions, 407 changer transitions 0/1004 dead transitions. [2024-06-27 20:12:37,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1004 transitions, 20664 flow [2024-06-27 20:12:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 20:12:37,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-27 20:12:37,724 INFO L175 Difference]: Start difference. First operand has 294 places, 860 transitions, 16182 flow. Second operand 10 states and 206 transitions. [2024-06-27 20:12:37,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1004 transitions, 20664 flow [2024-06-27 20:12:38,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1004 transitions, 20284 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:38,913 INFO L231 Difference]: Finished difference. Result has 302 places, 904 transitions, 17484 flow [2024-06-27 20:12:38,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15802, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17484, PETRI_PLACES=302, PETRI_TRANSITIONS=904} [2024-06-27 20:12:38,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-27 20:12:38,914 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 904 transitions, 17484 flow [2024-06-27 20:12:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:38,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:38,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:12:38,915 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:38,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2004631604, now seen corresponding path program 7 times [2024-06-27 20:12:38,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:38,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306356417] [2024-06-27 20:12:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:38,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:39,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:39,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306356417] [2024-06-27 20:12:39,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306356417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:39,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:39,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:39,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164387503] [2024-06-27 20:12:39,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:39,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:39,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:39,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 904 transitions, 17484 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:39,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:39,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:39,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:41,983 INFO L124 PetriNetUnfolderBase]: 5949/8655 cut-off events. [2024-06-27 20:12:41,983 INFO L125 PetriNetUnfolderBase]: For 661210/661222 co-relation queries the response was YES. [2024-06-27 20:12:42,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90277 conditions, 8655 events. 5949/8655 cut-off events. For 661210/661222 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 46198 event pairs, 1065 based on Foata normal form. 22/8676 useless extension candidates. Maximal degree in co-relation 90150. Up to 5950 conditions per place. [2024-06-27 20:12:42,111 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 604 selfloop transitions, 397 changer transitions 0/1004 dead transitions. [2024-06-27 20:12:42,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1004 transitions, 21294 flow [2024-06-27 20:12:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 20:12:42,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 20:12:42,113 INFO L175 Difference]: Start difference. First operand has 302 places, 904 transitions, 17484 flow. Second operand 10 states and 205 transitions. [2024-06-27 20:12:42,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1004 transitions, 21294 flow [2024-06-27 20:12:43,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 1004 transitions, 20576 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:43,681 INFO L231 Difference]: Finished difference. Result has 307 places, 904 transitions, 17590 flow [2024-06-27 20:12:43,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16766, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17590, PETRI_PLACES=307, PETRI_TRANSITIONS=904} [2024-06-27 20:12:43,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-27 20:12:43,683 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 904 transitions, 17590 flow [2024-06-27 20:12:43,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:43,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:43,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:43,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:12:43,683 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:43,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:43,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1827022952, now seen corresponding path program 9 times [2024-06-27 20:12:43,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:43,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406119104] [2024-06-27 20:12:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:43,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:44,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:44,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406119104] [2024-06-27 20:12:44,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406119104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:44,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:44,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970632783] [2024-06-27 20:12:44,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:44,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:44,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:44,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 904 transitions, 17590 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:44,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:44,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:44,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:47,053 INFO L124 PetriNetUnfolderBase]: 5755/8467 cut-off events. [2024-06-27 20:12:47,053 INFO L125 PetriNetUnfolderBase]: For 658741/658784 co-relation queries the response was YES. [2024-06-27 20:12:47,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88152 conditions, 8467 events. 5755/8467 cut-off events. For 658741/658784 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 46002 event pairs, 1024 based on Foata normal form. 19/8473 useless extension candidates. Maximal degree in co-relation 88024. Up to 6961 conditions per place. [2024-06-27 20:12:47,180 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 506 selfloop transitions, 279 changer transitions 0/952 dead transitions. [2024-06-27 20:12:47,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 952 transitions, 20087 flow [2024-06-27 20:12:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:12:47,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 20:12:47,182 INFO L175 Difference]: Start difference. First operand has 307 places, 904 transitions, 17590 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:12:47,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 952 transitions, 20087 flow [2024-06-27 20:12:48,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 952 transitions, 19287 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:48,582 INFO L231 Difference]: Finished difference. Result has 309 places, 913 transitions, 17596 flow [2024-06-27 20:12:48,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16790, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17596, PETRI_PLACES=309, PETRI_TRANSITIONS=913} [2024-06-27 20:12:48,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 20:12:48,583 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 913 transitions, 17596 flow [2024-06-27 20:12:48,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:48,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:48,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:48,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:12:48,584 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:48,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash -503818262, now seen corresponding path program 8 times [2024-06-27 20:12:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:48,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256063068] [2024-06-27 20:12:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:48,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:49,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:49,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256063068] [2024-06-27 20:12:49,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256063068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:49,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:49,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:49,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312809738] [2024-06-27 20:12:49,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:49,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:49,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:49,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:49,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 913 transitions, 17596 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:49,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:49,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:49,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:51,775 INFO L124 PetriNetUnfolderBase]: 6130/8917 cut-off events. [2024-06-27 20:12:51,775 INFO L125 PetriNetUnfolderBase]: For 712493/712505 co-relation queries the response was YES. [2024-06-27 20:12:51,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92368 conditions, 8917 events. 6130/8917 cut-off events. For 712493/712505 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 47791 event pairs, 995 based on Foata normal form. 18/8934 useless extension candidates. Maximal degree in co-relation 92239. Up to 6112 conditions per place. [2024-06-27 20:12:51,900 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 570 selfloop transitions, 462 changer transitions 0/1035 dead transitions. [2024-06-27 20:12:51,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1035 transitions, 21752 flow [2024-06-27 20:12:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:12:51,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 20:12:51,902 INFO L175 Difference]: Start difference. First operand has 309 places, 913 transitions, 17596 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:12:51,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1035 transitions, 21752 flow [2024-06-27 20:12:53,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1035 transitions, 21232 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:53,392 INFO L231 Difference]: Finished difference. Result has 315 places, 948 transitions, 18981 flow [2024-06-27 20:12:53,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17076, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18981, PETRI_PLACES=315, PETRI_TRANSITIONS=948} [2024-06-27 20:12:53,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-27 20:12:53,393 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 948 transitions, 18981 flow [2024-06-27 20:12:53,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:53,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:53,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:53,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:12:53,394 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:53,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:53,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1832135204, now seen corresponding path program 9 times [2024-06-27 20:12:53,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:53,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951731718] [2024-06-27 20:12:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:53,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:54,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:54,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951731718] [2024-06-27 20:12:54,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951731718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:54,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:54,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:54,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968919855] [2024-06-27 20:12:54,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:54,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:54,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:54,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:54,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:54,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:54,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 948 transitions, 18981 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:54,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:54,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:54,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:56,554 INFO L124 PetriNetUnfolderBase]: 6208/9024 cut-off events. [2024-06-27 20:12:56,554 INFO L125 PetriNetUnfolderBase]: For 764806/764818 co-relation queries the response was YES. [2024-06-27 20:12:56,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97367 conditions, 9024 events. 6208/9024 cut-off events. For 764806/764818 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48389 event pairs, 1075 based on Foata normal form. 20/9043 useless extension candidates. Maximal degree in co-relation 97235. Up to 6175 conditions per place. [2024-06-27 20:12:56,684 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 625 selfloop transitions, 428 changer transitions 0/1056 dead transitions. [2024-06-27 20:12:56,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1056 transitions, 23100 flow [2024-06-27 20:12:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 20:12:56,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 20:12:56,686 INFO L175 Difference]: Start difference. First operand has 315 places, 948 transitions, 18981 flow. Second operand 10 states and 204 transitions. [2024-06-27 20:12:56,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1056 transitions, 23100 flow [2024-06-27 20:12:58,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1056 transitions, 22507 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:58,352 INFO L231 Difference]: Finished difference. Result has 320 places, 961 transitions, 19551 flow [2024-06-27 20:12:58,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18436, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19551, PETRI_PLACES=320, PETRI_TRANSITIONS=961} [2024-06-27 20:12:58,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-27 20:12:58,353 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 961 transitions, 19551 flow [2024-06-27 20:12:58,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:58,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:58,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:58,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:12:58,354 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:58,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:58,356 INFO L85 PathProgramCache]: Analyzing trace with hash -975051122, now seen corresponding path program 10 times [2024-06-27 20:12:58,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:58,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186834659] [2024-06-27 20:12:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:58,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:59,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186834659] [2024-06-27 20:12:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186834659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:59,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:59,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491586023] [2024-06-27 20:12:59,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:59,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:59,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:12:59,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 961 transitions, 19551 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:59,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:59,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:12:59,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:01,591 INFO L124 PetriNetUnfolderBase]: 6180/8988 cut-off events. [2024-06-27 20:13:01,591 INFO L125 PetriNetUnfolderBase]: For 765263/765275 co-relation queries the response was YES. [2024-06-27 20:13:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95783 conditions, 8988 events. 6180/8988 cut-off events. For 765263/765275 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48141 event pairs, 1082 based on Foata normal form. 22/9009 useless extension candidates. Maximal degree in co-relation 95650. Up to 6163 conditions per place. [2024-06-27 20:13:01,725 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 612 selfloop transitions, 433 changer transitions 0/1048 dead transitions. [2024-06-27 20:13:01,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1048 transitions, 23205 flow [2024-06-27 20:13:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:13:01,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 20:13:01,727 INFO L175 Difference]: Start difference. First operand has 320 places, 961 transitions, 19551 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:13:01,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1048 transitions, 23205 flow [2024-06-27 20:13:03,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1048 transitions, 22097 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:03,484 INFO L231 Difference]: Finished difference. Result has 323 places, 961 transitions, 19335 flow [2024-06-27 20:13:03,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18447, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19335, PETRI_PLACES=323, PETRI_TRANSITIONS=961} [2024-06-27 20:13:03,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-27 20:13:03,485 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 961 transitions, 19335 flow [2024-06-27 20:13:03,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:03,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:03,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:03,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:13:03,485 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:03,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1832141900, now seen corresponding path program 10 times [2024-06-27 20:13:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571631744] [2024-06-27 20:13:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:03,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:04,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:04,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571631744] [2024-06-27 20:13:04,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571631744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:04,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:04,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:04,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363460527] [2024-06-27 20:13:04,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:04,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:04,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:04,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:04,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:04,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 961 transitions, 19335 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:04,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:04,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:04,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:06,569 INFO L124 PetriNetUnfolderBase]: 5951/8755 cut-off events. [2024-06-27 20:13:06,569 INFO L125 PetriNetUnfolderBase]: For 749721/749762 co-relation queries the response was YES. [2024-06-27 20:13:06,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92674 conditions, 8755 events. 5951/8755 cut-off events. For 749721/749762 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47723 event pairs, 998 based on Foata normal form. 17/8759 useless extension candidates. Maximal degree in co-relation 92540. Up to 7211 conditions per place. [2024-06-27 20:13:06,706 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 529 selfloop transitions, 288 changer transitions 0/999 dead transitions. [2024-06-27 20:13:06,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 999 transitions, 21553 flow [2024-06-27 20:13:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:13:06,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 20:13:06,708 INFO L175 Difference]: Start difference. First operand has 323 places, 961 transitions, 19335 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:13:06,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 999 transitions, 21553 flow [2024-06-27 20:13:08,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 999 transitions, 20720 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:08,303 INFO L231 Difference]: Finished difference. Result has 325 places, 964 transitions, 19176 flow [2024-06-27 20:13:08,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18502, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19176, PETRI_PLACES=325, PETRI_TRANSITIONS=964} [2024-06-27 20:13:08,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 20:13:08,304 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 964 transitions, 19176 flow [2024-06-27 20:13:08,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:08,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:08,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:08,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:13:08,305 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)] === [2024-06-27 20:13:08,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:08,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1831895636, now seen corresponding path program 1 times [2024-06-27 20:13:08,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:08,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453786169] [2024-06-27 20:13:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:09,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:09,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453786169] [2024-06-27 20:13:09,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453786169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:09,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:09,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:09,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849054008] [2024-06-27 20:13:09,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:09,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:09,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:09,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:09,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:09,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 964 transitions, 19176 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:09,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:09,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:09,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:11,737 INFO L124 PetriNetUnfolderBase]: 6045/8879 cut-off events. [2024-06-27 20:13:11,737 INFO L125 PetriNetUnfolderBase]: For 823345/823413 co-relation queries the response was YES. [2024-06-27 20:13:11,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93555 conditions, 8879 events. 6045/8879 cut-off events. For 823345/823413 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48976 event pairs, 1540 based on Foata normal form. 65/8894 useless extension candidates. Maximal degree in co-relation 93420. Up to 7896 conditions per place. [2024-06-27 20:13:11,871 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 809 selfloop transitions, 107 changer transitions 0/1020 dead transitions. [2024-06-27 20:13:11,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1020 transitions, 21943 flow [2024-06-27 20:13:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:13:11,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 20:13:11,873 INFO L175 Difference]: Start difference. First operand has 325 places, 964 transitions, 19176 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:13:11,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1020 transitions, 21943 flow [2024-06-27 20:13:13,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1020 transitions, 21330 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:13,641 INFO L231 Difference]: Finished difference. Result has 328 places, 980 transitions, 19125 flow [2024-06-27 20:13:13,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18563, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=869, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19125, PETRI_PLACES=328, PETRI_TRANSITIONS=980} [2024-06-27 20:13:13,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-27 20:13:13,642 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 980 transitions, 19125 flow [2024-06-27 20:13:13,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:13,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:13,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:13,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:13:13,643 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:13,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1331879852, now seen corresponding path program 1 times [2024-06-27 20:13:13,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:13,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476550567] [2024-06-27 20:13:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:14,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:14,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476550567] [2024-06-27 20:13:14,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476550567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:14,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:14,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:13:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242490531] [2024-06-27 20:13:14,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:14,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:13:14,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:13:14,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:13:14,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:13:14,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 980 transitions, 19125 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:14,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:14,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:13:14,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:16,308 INFO L124 PetriNetUnfolderBase]: 5654/8447 cut-off events. [2024-06-27 20:13:16,309 INFO L125 PetriNetUnfolderBase]: For 824670/824744 co-relation queries the response was YES. [2024-06-27 20:13:16,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90167 conditions, 8447 events. 5654/8447 cut-off events. For 824670/824744 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47878 event pairs, 1541 based on Foata normal form. 61/8441 useless extension candidates. Maximal degree in co-relation 90030. Up to 7289 conditions per place. [2024-06-27 20:13:16,445 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 754 selfloop transitions, 21 changer transitions 0/998 dead transitions. [2024-06-27 20:13:16,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 998 transitions, 20863 flow [2024-06-27 20:13:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:13:16,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-27 20:13:16,448 INFO L175 Difference]: Start difference. First operand has 328 places, 980 transitions, 19125 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:13:16,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 998 transitions, 20863 flow [2024-06-27 20:13:18,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 998 transitions, 20283 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:18,252 INFO L231 Difference]: Finished difference. Result has 327 places, 980 transitions, 18593 flow [2024-06-27 20:13:18,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18545, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=959, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18593, PETRI_PLACES=327, PETRI_TRANSITIONS=980} [2024-06-27 20:13:18,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-27 20:13:18,267 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 980 transitions, 18593 flow [2024-06-27 20:13:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:18,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:18,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:18,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:13:18,267 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:18,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1385682634, now seen corresponding path program 11 times [2024-06-27 20:13:18,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:18,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634501035] [2024-06-27 20:13:18,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:18,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:19,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:19,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634501035] [2024-06-27 20:13:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634501035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:19,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:19,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:19,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400231509] [2024-06-27 20:13:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:19,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:19,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:19,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:19,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 980 transitions, 18593 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:19,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:19,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:19,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:21,630 INFO L124 PetriNetUnfolderBase]: 6067/8913 cut-off events. [2024-06-27 20:13:21,631 INFO L125 PetriNetUnfolderBase]: For 861937/862085 co-relation queries the response was YES. [2024-06-27 20:13:21,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93229 conditions, 8913 events. 6067/8913 cut-off events. For 861937/862085 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 49273 event pairs, 1472 based on Foata normal form. 13/8862 useless extension candidates. Maximal degree in co-relation 93094. Up to 7851 conditions per place. [2024-06-27 20:13:21,749 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 706 selfloop transitions, 123 changer transitions 0/1014 dead transitions. [2024-06-27 20:13:21,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1014 transitions, 20449 flow [2024-06-27 20:13:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:13:21,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 20:13:21,751 INFO L175 Difference]: Start difference. First operand has 327 places, 980 transitions, 18593 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:13:21,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1014 transitions, 20449 flow [2024-06-27 20:13:23,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1014 transitions, 20221 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:23,632 INFO L231 Difference]: Finished difference. Result has 331 places, 980 transitions, 18671 flow [2024-06-27 20:13:23,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18365, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18671, PETRI_PLACES=331, PETRI_TRANSITIONS=980} [2024-06-27 20:13:23,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-27 20:13:23,640 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 980 transitions, 18671 flow [2024-06-27 20:13:23,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:23,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:23,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:23,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:13:23,641 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:23,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1385802604, now seen corresponding path program 12 times [2024-06-27 20:13:23,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:23,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941956544] [2024-06-27 20:13:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:24,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:24,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941956544] [2024-06-27 20:13:24,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941956544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:24,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:24,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919553913] [2024-06-27 20:13:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:24,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:24,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 980 transitions, 18671 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:24,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:24,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:24,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:26,985 INFO L124 PetriNetUnfolderBase]: 6090/8939 cut-off events. [2024-06-27 20:13:26,986 INFO L125 PetriNetUnfolderBase]: For 889826/889986 co-relation queries the response was YES. [2024-06-27 20:13:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94269 conditions, 8939 events. 6090/8939 cut-off events. For 889826/889986 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 49316 event pairs, 1315 based on Foata normal form. 17/8887 useless extension candidates. Maximal degree in co-relation 94134. Up to 7429 conditions per place. [2024-06-27 20:13:27,118 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 533 selfloop transitions, 308 changer transitions 0/1026 dead transitions. [2024-06-27 20:13:27,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1026 transitions, 21071 flow [2024-06-27 20:13:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:13:27,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:13:27,119 INFO L175 Difference]: Start difference. First operand has 331 places, 980 transitions, 18671 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:13:27,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1026 transitions, 21071 flow [2024-06-27 20:13:28,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1026 transitions, 20661 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 20:13:28,822 INFO L231 Difference]: Finished difference. Result has 330 places, 986 transitions, 19098 flow [2024-06-27 20:13:28,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18277, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19098, PETRI_PLACES=330, PETRI_TRANSITIONS=986} [2024-06-27 20:13:28,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 20:13:28,823 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 986 transitions, 19098 flow [2024-06-27 20:13:28,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:28,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:28,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:28,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:13:28,824 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:28,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1385802790, now seen corresponding path program 11 times [2024-06-27 20:13:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:28,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045309931] [2024-06-27 20:13:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:28,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:29,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:29,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045309931] [2024-06-27 20:13:29,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045309931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:29,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:29,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:29,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789033096] [2024-06-27 20:13:29,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:29,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:29,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:29,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:29,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:29,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:13:29,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 986 transitions, 19098 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:29,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:29,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:13:29,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:31,940 INFO L124 PetriNetUnfolderBase]: 6387/9298 cut-off events. [2024-06-27 20:13:31,940 INFO L125 PetriNetUnfolderBase]: For 815123/815135 co-relation queries the response was YES. [2024-06-27 20:13:32,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96228 conditions, 9298 events. 6387/9298 cut-off events. For 815123/815135 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 50424 event pairs, 1265 based on Foata normal form. 18/9315 useless extension candidates. Maximal degree in co-relation 96094. Up to 6103 conditions per place. [2024-06-27 20:13:32,084 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 456 selfloop transitions, 604 changer transitions 0/1063 dead transitions. [2024-06-27 20:13:32,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1063 transitions, 22713 flow [2024-06-27 20:13:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 20:13:32,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-27 20:13:32,086 INFO L175 Difference]: Start difference. First operand has 330 places, 986 transitions, 19098 flow. Second operand 9 states and 184 transitions. [2024-06-27 20:13:32,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1063 transitions, 22713 flow [2024-06-27 20:13:33,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1063 transitions, 21927 flow, removed 136 selfloop flow, removed 11 redundant places. [2024-06-27 20:13:33,782 INFO L231 Difference]: Finished difference. Result has 330 places, 1008 transitions, 20371 flow [2024-06-27 20:13:33,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18348, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=585, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20371, PETRI_PLACES=330, PETRI_TRANSITIONS=1008} [2024-06-27 20:13:33,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 20:13:33,783 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 1008 transitions, 20371 flow [2024-06-27 20:13:33,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:33,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:33,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:33,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:13:33,784 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:33,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash -444488374, now seen corresponding path program 13 times [2024-06-27 20:13:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:33,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088593443] [2024-06-27 20:13:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:33,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:34,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:34,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088593443] [2024-06-27 20:13:34,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088593443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:34,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:34,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:34,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518722654] [2024-06-27 20:13:34,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:34,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:34,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:34,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:34,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:34,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1008 transitions, 20371 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:34,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:34,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:34,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:36,955 INFO L124 PetriNetUnfolderBase]: 6178/9089 cut-off events. [2024-06-27 20:13:36,956 INFO L125 PetriNetUnfolderBase]: For 766028/766078 co-relation queries the response was YES. [2024-06-27 20:13:37,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97067 conditions, 9089 events. 6178/9089 cut-off events. For 766028/766078 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 50073 event pairs, 1258 based on Foata normal form. 16/9078 useless extension candidates. Maximal degree in co-relation 96935. Up to 7516 conditions per place. [2024-06-27 20:13:37,090 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 559 selfloop transitions, 308 changer transitions 0/1059 dead transitions. [2024-06-27 20:13:37,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1059 transitions, 23027 flow [2024-06-27 20:13:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:13:37,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:13:37,091 INFO L175 Difference]: Start difference. First operand has 330 places, 1008 transitions, 20371 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:13:37,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1059 transitions, 23027 flow [2024-06-27 20:13:39,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1059 transitions, 22507 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 20:13:39,111 INFO L231 Difference]: Finished difference. Result has 335 places, 1017 transitions, 20767 flow [2024-06-27 20:13:39,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19859, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20767, PETRI_PLACES=335, PETRI_TRANSITIONS=1017} [2024-06-27 20:13:39,112 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-27 20:13:39,112 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1017 transitions, 20767 flow [2024-06-27 20:13:39,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:39,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:39,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:39,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:13:39,113 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:39,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1390450930, now seen corresponding path program 12 times [2024-06-27 20:13:39,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:39,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759592614] [2024-06-27 20:13:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:39,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:39,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759592614] [2024-06-27 20:13:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759592614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:39,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531114905] [2024-06-27 20:13:39,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:39,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:39,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:13:39,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1017 transitions, 20767 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:39,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:39,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:13:39,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:42,423 INFO L124 PetriNetUnfolderBase]: 6682/9725 cut-off events. [2024-06-27 20:13:42,424 INFO L125 PetriNetUnfolderBase]: For 797925/797937 co-relation queries the response was YES. [2024-06-27 20:13:42,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103462 conditions, 9725 events. 6682/9725 cut-off events. For 797925/797937 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 53175 event pairs, 1229 based on Foata normal form. 20/9744 useless extension candidates. Maximal degree in co-relation 103328. Up to 6355 conditions per place. [2024-06-27 20:13:42,564 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 527 selfloop transitions, 597 changer transitions 0/1127 dead transitions. [2024-06-27 20:13:42,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1127 transitions, 25178 flow [2024-06-27 20:13:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 20:13:42,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-27 20:13:42,566 INFO L175 Difference]: Start difference. First operand has 335 places, 1017 transitions, 20767 flow. Second operand 9 states and 183 transitions. [2024-06-27 20:13:42,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1127 transitions, 25178 flow [2024-06-27 20:13:44,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1127 transitions, 24528 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:44,411 INFO L231 Difference]: Finished difference. Result has 339 places, 1058 transitions, 22501 flow [2024-06-27 20:13:44,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20145, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22501, PETRI_PLACES=339, PETRI_TRANSITIONS=1058} [2024-06-27 20:13:44,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-27 20:13:44,412 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1058 transitions, 22501 flow [2024-06-27 20:13:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:44,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:44,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:44,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:13:44,413 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:44,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1390444420, now seen corresponding path program 13 times [2024-06-27 20:13:44,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:44,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085118859] [2024-06-27 20:13:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:44,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:45,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:45,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085118859] [2024-06-27 20:13:45,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085118859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:45,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:45,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696417436] [2024-06-27 20:13:45,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:45,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:45,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:13:45,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1058 transitions, 22501 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:45,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:45,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:13:45,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:48,073 INFO L124 PetriNetUnfolderBase]: 6654/9686 cut-off events. [2024-06-27 20:13:48,073 INFO L125 PetriNetUnfolderBase]: For 782350/782362 co-relation queries the response was YES. [2024-06-27 20:13:48,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105865 conditions, 9686 events. 6654/9686 cut-off events. For 782350/782362 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 52914 event pairs, 1284 based on Foata normal form. 22/9707 useless extension candidates. Maximal degree in co-relation 105730. Up to 6343 conditions per place. [2024-06-27 20:13:48,213 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 553 selfloop transitions, 573 changer transitions 0/1129 dead transitions. [2024-06-27 20:13:48,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1129 transitions, 26177 flow [2024-06-27 20:13:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:13:48,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 20:13:48,214 INFO L175 Difference]: Start difference. First operand has 339 places, 1058 transitions, 22501 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:13:48,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1129 transitions, 26177 flow [2024-06-27 20:13:50,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1129 transitions, 25423 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-06-27 20:13:50,640 INFO L231 Difference]: Finished difference. Result has 344 places, 1058 transitions, 22955 flow [2024-06-27 20:13:50,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21749, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22955, PETRI_PLACES=344, PETRI_TRANSITIONS=1058} [2024-06-27 20:13:50,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 20:13:50,641 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1058 transitions, 22955 flow [2024-06-27 20:13:50,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:50,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:50,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:50,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:13:50,642 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:50,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:50,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1563180388, now seen corresponding path program 2 times [2024-06-27 20:13:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:50,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022320691] [2024-06-27 20:13:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:50,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:51,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:51,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022320691] [2024-06-27 20:13:51,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022320691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:51,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:51,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:13:51,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205164253] [2024-06-27 20:13:51,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:51,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:13:51,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:13:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:13:51,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:51,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1058 transitions, 22955 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:51,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:51,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:51,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:54,606 INFO L124 PetriNetUnfolderBase]: 6481/9512 cut-off events. [2024-06-27 20:13:54,607 INFO L125 PetriNetUnfolderBase]: For 835286/835370 co-relation queries the response was YES. [2024-06-27 20:13:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104907 conditions, 9512 events. 6481/9512 cut-off events. For 835286/835370 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 53084 event pairs, 1586 based on Foata normal form. 78/9524 useless extension candidates. Maximal degree in co-relation 104771. Up to 8494 conditions per place. [2024-06-27 20:13:54,758 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 881 selfloop transitions, 111 changer transitions 0/1096 dead transitions. [2024-06-27 20:13:54,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1096 transitions, 25581 flow [2024-06-27 20:13:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:13:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:13:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:13:54,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:13:54,760 INFO L175 Difference]: Start difference. First operand has 344 places, 1058 transitions, 22955 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:13:54,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1096 transitions, 25581 flow [2024-06-27 20:13:56,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1096 transitions, 24521 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:56,485 INFO L231 Difference]: Finished difference. Result has 344 places, 1061 transitions, 22253 flow [2024-06-27 20:13:56,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21917, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=947, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22253, PETRI_PLACES=344, PETRI_TRANSITIONS=1061} [2024-06-27 20:13:56,486 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 20:13:56,486 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1061 transitions, 22253 flow [2024-06-27 20:13:56,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:56,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:56,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:56,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:13:56,487 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:56,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1563171460, now seen corresponding path program 14 times [2024-06-27 20:13:56,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:56,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125596913] [2024-06-27 20:13:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:57,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:57,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125596913] [2024-06-27 20:13:57,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125596913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:57,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:57,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:57,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302136620] [2024-06-27 20:13:57,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:57,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:57,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:57,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:13:57,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1061 transitions, 22253 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:57,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:57,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:13:57,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:00,387 INFO L124 PetriNetUnfolderBase]: 7026/10207 cut-off events. [2024-06-27 20:14:00,388 INFO L125 PetriNetUnfolderBase]: For 796965/796977 co-relation queries the response was YES. [2024-06-27 20:14:00,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109214 conditions, 10207 events. 7026/10207 cut-off events. For 796965/796977 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 55900 event pairs, 1002 based on Foata normal form. 22/10228 useless extension candidates. Maximal degree in co-relation 109079. Up to 6660 conditions per place. [2024-06-27 20:14:00,636 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 534 selfloop transitions, 651 changer transitions 0/1188 dead transitions. [2024-06-27 20:14:00,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1188 transitions, 27048 flow [2024-06-27 20:14:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:14:00,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:14:00,637 INFO L175 Difference]: Start difference. First operand has 344 places, 1061 transitions, 22253 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:14:00,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1188 transitions, 27048 flow [2024-06-27 20:14:02,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1188 transitions, 26782 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:02,588 INFO L231 Difference]: Finished difference. Result has 350 places, 1115 transitions, 24982 flow [2024-06-27 20:14:02,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21987, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24982, PETRI_PLACES=350, PETRI_TRANSITIONS=1115} [2024-06-27 20:14:02,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-27 20:14:02,590 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1115 transitions, 24982 flow [2024-06-27 20:14:02,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:02,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:02,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:02,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:14:02,590 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:02,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1562940820, now seen corresponding path program 15 times [2024-06-27 20:14:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:02,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798778277] [2024-06-27 20:14:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:02,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:03,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798778277] [2024-06-27 20:14:03,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798778277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:03,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:03,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126006573] [2024-06-27 20:14:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:03,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:03,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:03,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:14:03,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1115 transitions, 24982 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:03,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:03,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:14:03,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:06,731 INFO L124 PetriNetUnfolderBase]: 7132/10356 cut-off events. [2024-06-27 20:14:06,731 INFO L125 PetriNetUnfolderBase]: For 864570/864582 co-relation queries the response was YES. [2024-06-27 20:14:06,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117174 conditions, 10356 events. 7132/10356 cut-off events. For 864570/864582 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 56760 event pairs, 1159 based on Foata normal form. 24/10379 useless extension candidates. Maximal degree in co-relation 117036. Up to 6747 conditions per place. [2024-06-27 20:14:06,895 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 607 selfloop transitions, 609 changer transitions 0/1219 dead transitions. [2024-06-27 20:14:06,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1219 transitions, 29583 flow [2024-06-27 20:14:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:14:06,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 20:14:06,897 INFO L175 Difference]: Start difference. First operand has 350 places, 1115 transitions, 24982 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:14:06,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1219 transitions, 29583 flow [2024-06-27 20:14:09,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1219 transitions, 28844 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:09,329 INFO L231 Difference]: Finished difference. Result has 355 places, 1133 transitions, 25934 flow [2024-06-27 20:14:09,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24290, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25934, PETRI_PLACES=355, PETRI_TRANSITIONS=1133} [2024-06-27 20:14:09,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 20:14:09,330 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1133 transitions, 25934 flow [2024-06-27 20:14:09,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:09,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:09,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:09,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:14:09,331 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:09,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash -271998298, now seen corresponding path program 16 times [2024-06-27 20:14:09,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:09,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751364913] [2024-06-27 20:14:09,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:09,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:10,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:10,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751364913] [2024-06-27 20:14:10,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751364913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:10,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:10,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:10,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744184673] [2024-06-27 20:14:10,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:10,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:10,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:10,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:10,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:14:10,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1133 transitions, 25934 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:10,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:10,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:14:10,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:13,273 INFO L124 PetriNetUnfolderBase]: 7096/10310 cut-off events. [2024-06-27 20:14:13,273 INFO L125 PetriNetUnfolderBase]: For 874543/874555 co-relation queries the response was YES. [2024-06-27 20:14:13,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115508 conditions, 10310 events. 7096/10310 cut-off events. For 874543/874555 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 56513 event pairs, 1135 based on Foata normal form. 26/10335 useless extension candidates. Maximal degree in co-relation 115369. Up to 6732 conditions per place. [2024-06-27 20:14:13,411 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 581 selfloop transitions, 623 changer transitions 0/1207 dead transitions. [2024-06-27 20:14:13,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1207 transitions, 29850 flow [2024-06-27 20:14:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:14:13,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:14:13,412 INFO L175 Difference]: Start difference. First operand has 355 places, 1133 transitions, 25934 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:14:13,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1207 transitions, 29850 flow [2024-06-27 20:14:15,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1207 transitions, 28105 flow, removed 105 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:15,562 INFO L231 Difference]: Finished difference. Result has 356 places, 1133 transitions, 25499 flow [2024-06-27 20:14:15,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24207, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25499, PETRI_PLACES=356, PETRI_TRANSITIONS=1133} [2024-06-27 20:14:15,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-27 20:14:15,563 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1133 transitions, 25499 flow [2024-06-27 20:14:15,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:15,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:15,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:15,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:14:15,564 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:15,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash -271998484, now seen corresponding path program 14 times [2024-06-27 20:14:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:15,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328545388] [2024-06-27 20:14:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:15,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:16,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:16,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328545388] [2024-06-27 20:14:16,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328545388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:16,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:16,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:16,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776462513] [2024-06-27 20:14:16,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:16,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:16,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:16,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:16,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1133 transitions, 25499 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:16,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:16,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:16,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:19,654 INFO L124 PetriNetUnfolderBase]: 6865/10098 cut-off events. [2024-06-27 20:14:19,654 INFO L125 PetriNetUnfolderBase]: For 828612/828660 co-relation queries the response was YES. [2024-06-27 20:14:19,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110125 conditions, 10098 events. 6865/10098 cut-off events. For 828612/828660 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 56536 event pairs, 1132 based on Foata normal form. 15/10100 useless extension candidates. Maximal degree in co-relation 109988. Up to 8350 conditions per place. [2024-06-27 20:14:19,801 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 636 selfloop transitions, 315 changer transitions 0/1182 dead transitions. [2024-06-27 20:14:19,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1182 transitions, 28373 flow [2024-06-27 20:14:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:14:19,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 20:14:19,803 INFO L175 Difference]: Start difference. First operand has 356 places, 1133 transitions, 25499 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:14:19,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1182 transitions, 28373 flow [2024-06-27 20:14:21,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1182 transitions, 26962 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-27 20:14:21,759 INFO L231 Difference]: Finished difference. Result has 355 places, 1145 transitions, 25110 flow [2024-06-27 20:14:21,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24096, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25110, PETRI_PLACES=355, PETRI_TRANSITIONS=1145} [2024-06-27 20:14:21,760 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 20:14:21,760 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1145 transitions, 25110 flow [2024-06-27 20:14:21,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:21,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:21,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:21,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:14:21,761 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:21,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash -649160412, now seen corresponding path program 2 times [2024-06-27 20:14:21,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:21,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719866901] [2024-06-27 20:14:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:21,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:22,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:22,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719866901] [2024-06-27 20:14:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719866901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:22,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:22,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:14:22,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854941687] [2024-06-27 20:14:22,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:22,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:14:22,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:22,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:14:22,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:14:22,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:14:22,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1145 transitions, 25110 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:22,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:22,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:14:22,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:25,157 INFO L124 PetriNetUnfolderBase]: 6381/9557 cut-off events. [2024-06-27 20:14:25,158 INFO L125 PetriNetUnfolderBase]: For 810158/810251 co-relation queries the response was YES. [2024-06-27 20:14:25,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102176 conditions, 9557 events. 6381/9557 cut-off events. For 810158/810251 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 55608 event pairs, 1611 based on Foata normal form. 76/9557 useless extension candidates. Maximal degree in co-relation 102041. Up to 8146 conditions per place. [2024-06-27 20:14:25,318 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 866 selfloop transitions, 23 changer transitions 0/1162 dead transitions. [2024-06-27 20:14:25,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1162 transitions, 27124 flow [2024-06-27 20:14:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:14:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:14:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:14:25,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:14:25,319 INFO L175 Difference]: Start difference. First operand has 355 places, 1145 transitions, 25110 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:14:25,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1162 transitions, 27124 flow [2024-06-27 20:14:27,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1162 transitions, 26432 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:27,214 INFO L231 Difference]: Finished difference. Result has 356 places, 1148 transitions, 24546 flow [2024-06-27 20:14:27,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24420, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=24546, PETRI_PLACES=356, PETRI_TRANSITIONS=1148} [2024-06-27 20:14:27,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-27 20:14:27,218 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1148 transitions, 24546 flow [2024-06-27 20:14:27,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:27,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:27,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:27,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:14:27,218 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:27,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -784943884, now seen corresponding path program 3 times [2024-06-27 20:14:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:27,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504439502] [2024-06-27 20:14:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:27,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:28,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:28,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504439502] [2024-06-27 20:14:28,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504439502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:28,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:28,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:14:28,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457211361] [2024-06-27 20:14:28,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:28,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:14:28,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:28,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:14:28,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:14:28,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:28,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1148 transitions, 24546 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:28,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:28,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:28,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:31,398 INFO L124 PetriNetUnfolderBase]: 6897/10133 cut-off events. [2024-06-27 20:14:31,398 INFO L125 PetriNetUnfolderBase]: For 844458/844548 co-relation queries the response was YES. [2024-06-27 20:14:31,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106819 conditions, 10133 events. 6897/10133 cut-off events. For 844458/844548 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 57402 event pairs, 1811 based on Foata normal form. 92/10168 useless extension candidates. Maximal degree in co-relation 106684. Up to 9407 conditions per place. [2024-06-27 20:14:31,532 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 1042 selfloop transitions, 32 changer transitions 0/1178 dead transitions. [2024-06-27 20:14:31,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1178 transitions, 27062 flow [2024-06-27 20:14:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:14:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:14:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:14:31,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 20:14:31,533 INFO L175 Difference]: Start difference. First operand has 356 places, 1148 transitions, 24546 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:14:31,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1178 transitions, 27062 flow [2024-06-27 20:14:32,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1178 transitions, 26986 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:33,087 INFO L231 Difference]: Finished difference. Result has 359 places, 1151 transitions, 24648 flow [2024-06-27 20:14:33,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24472, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24648, PETRI_PLACES=359, PETRI_TRANSITIONS=1151} [2024-06-27 20:14:33,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-27 20:14:33,088 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1151 transitions, 24648 flow [2024-06-27 20:14:33,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:33,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:33,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:33,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:14:33,089 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:33,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:33,089 INFO L85 PathProgramCache]: Analyzing trace with hash -784952812, now seen corresponding path program 17 times [2024-06-27 20:14:33,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:33,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857321767] [2024-06-27 20:14:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:33,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:33,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:33,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857321767] [2024-06-27 20:14:33,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857321767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:33,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:33,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:33,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554695433] [2024-06-27 20:14:33,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:33,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:33,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:33,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:14:33,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1151 transitions, 24648 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:33,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:33,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:14:33,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:36,966 INFO L124 PetriNetUnfolderBase]: 7239/10538 cut-off events. [2024-06-27 20:14:36,966 INFO L125 PetriNetUnfolderBase]: For 839671/839671 co-relation queries the response was YES. [2024-06-27 20:14:37,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110894 conditions, 10538 events. 7239/10538 cut-off events. For 839671/839671 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 58402 event pairs, 1944 based on Foata normal form. 12/10549 useless extension candidates. Maximal degree in co-relation 110759. Up to 10232 conditions per place. [2024-06-27 20:14:37,150 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 1146 selfloop transitions, 55 changer transitions 0/1204 dead transitions. [2024-06-27 20:14:37,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1204 transitions, 27779 flow [2024-06-27 20:14:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:14:37,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 20:14:37,152 INFO L175 Difference]: Start difference. First operand has 359 places, 1151 transitions, 24648 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:14:37,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1204 transitions, 27779 flow [2024-06-27 20:14:38,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1204 transitions, 27643 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:38,803 INFO L231 Difference]: Finished difference. Result has 363 places, 1165 transitions, 24984 flow [2024-06-27 20:14:38,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24512, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24984, PETRI_PLACES=363, PETRI_TRANSITIONS=1165} [2024-06-27 20:14:38,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-27 20:14:38,804 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1165 transitions, 24984 flow [2024-06-27 20:14:38,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:38,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:38,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:38,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:14:38,804 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:38,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:38,805 INFO L85 PathProgramCache]: Analyzing trace with hash -940737516, now seen corresponding path program 18 times [2024-06-27 20:14:38,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:38,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516387410] [2024-06-27 20:14:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:38,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:39,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516387410] [2024-06-27 20:14:39,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516387410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:39,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:39,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:39,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414664428] [2024-06-27 20:14:39,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:39,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:39,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:39,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:14:39,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1165 transitions, 24984 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:39,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:39,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:14:39,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:42,925 INFO L124 PetriNetUnfolderBase]: 7501/10912 cut-off events. [2024-06-27 20:14:42,925 INFO L125 PetriNetUnfolderBase]: For 919923/919923 co-relation queries the response was YES. [2024-06-27 20:14:43,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116421 conditions, 10912 events. 7501/10912 cut-off events. For 919923/919923 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 60681 event pairs, 1906 based on Foata normal form. 16/10927 useless extension candidates. Maximal degree in co-relation 116285. Up to 9812 conditions per place. [2024-06-27 20:14:43,088 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 1100 selfloop transitions, 170 changer transitions 0/1273 dead transitions. [2024-06-27 20:14:43,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1273 transitions, 29860 flow [2024-06-27 20:14:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:14:43,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 20:14:43,090 INFO L175 Difference]: Start difference. First operand has 363 places, 1165 transitions, 24984 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:14:43,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1273 transitions, 29860 flow [2024-06-27 20:14:44,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1273 transitions, 29691 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:14:44,850 INFO L231 Difference]: Finished difference. Result has 368 places, 1211 transitions, 26416 flow [2024-06-27 20:14:44,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24815, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26416, PETRI_PLACES=368, PETRI_TRANSITIONS=1211} [2024-06-27 20:14:44,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-27 20:14:44,851 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 1211 transitions, 26416 flow [2024-06-27 20:14:44,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:44,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:44,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:44,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:14:44,852 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:44,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash -940744212, now seen corresponding path program 15 times [2024-06-27 20:14:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:44,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195933636] [2024-06-27 20:14:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:45,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:45,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195933636] [2024-06-27 20:14:45,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195933636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:45,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:45,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:45,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134792039] [2024-06-27 20:14:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:45,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:45,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:46,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:46,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 1211 transitions, 26416 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:46,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:46,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:46,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:49,066 INFO L124 PetriNetUnfolderBase]: 7267/10659 cut-off events. [2024-06-27 20:14:49,066 INFO L125 PetriNetUnfolderBase]: For 940617/940767 co-relation queries the response was YES. [2024-06-27 20:14:49,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115373 conditions, 10659 events. 7267/10659 cut-off events. For 940617/940767 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 60423 event pairs, 1871 based on Foata normal form. 15/10613 useless extension candidates. Maximal degree in co-relation 115234. Up to 9549 conditions per place. [2024-06-27 20:14:49,224 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 937 selfloop transitions, 48 changer transitions 0/1237 dead transitions. [2024-06-27 20:14:49,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1237 transitions, 28611 flow [2024-06-27 20:14:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:14:49,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 20:14:49,225 INFO L175 Difference]: Start difference. First operand has 368 places, 1211 transitions, 26416 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:14:49,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1237 transitions, 28611 flow