./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016_pso.opt_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/mix016_pso.opt_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/mix016_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix016_pso.opt_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 20:02:37,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:02:37,777 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:02:37,782 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:02:37,783 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:02:37,807 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:02:37,808 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:02:37,808 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:02:37,809 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:02:37,812 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:02:37,812 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:02:37,812 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:02:37,813 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:02:37,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:02:37,814 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:02:37,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:02:37,815 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:02:37,815 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:02:37,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:02:37,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:02:37,815 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:02:37,816 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:02:37,816 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:02:37,816 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:02:37,816 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:02:37,817 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:02:37,817 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:02:37,817 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:02:37,817 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:02:37,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:02:37,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:02:37,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:02:37,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:02:37,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:02:37,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:02:37,819 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:02:37,819 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:02:37,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:02:37,820 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:02:37,820 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:02:37,820 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:02:37,821 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:02:37,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:02:37,821 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:02:38,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:02:38,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:02:38,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:02:38,043 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:02:38,043 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:02:38,044 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016_pso.opt_tso.opt.i [2024-06-27 20:02:39,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:02:39,261 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:02:39,261 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_pso.opt_tso.opt.i [2024-06-27 20:02:39,274 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee266acd8/5f1b902454a7416890398f865465282f/FLAG4dc55f1ac [2024-06-27 20:02:39,286 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee266acd8/5f1b902454a7416890398f865465282f [2024-06-27 20:02:39,288 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:02:39,297 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:02:39,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix016_pso.opt_tso.opt.yml/witness.yml [2024-06-27 20:02:39,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:02:39,485 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:02:39,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:02:39,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:02:39,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:02:39,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:02:39" (1/2) ... [2024-06-27 20:02:39,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9ff506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:02:39, skipping insertion in model container [2024-06-27 20:02:39,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:02:39" (1/2) ... [2024-06-27 20:02:39,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@616cb000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:02:39, skipping insertion in model container [2024-06-27 20:02:39,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:02:39" (2/2) ... [2024-06-27 20:02:39,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9ff506 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:39, skipping insertion in model container [2024-06-27 20:02:39,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:02:39" (2/2) ... [2024-06-27 20:02:39,495 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:02:39,577 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:02:39,579 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:02:39,579 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:02:39,579 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:02:39,579 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:02:39,579 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-27 20:02:39,625 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:02:39,930 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:02:39,941 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:02:40,082 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:02:40,108 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:02:40,109 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40 WrapperNode [2024-06-27 20:02:40,109 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:02:40,110 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:02:40,110 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:02:40,110 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:02:40,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,182 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 149 [2024-06-27 20:02:40,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:02:40,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:02:40,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:02:40,184 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:02:40,192 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,228 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 20:02:40,229 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,229 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,236 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,237 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,239 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,241 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:02:40,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:02:40,244 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:02:40,244 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:02:40,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (1/1) ... [2024-06-27 20:02:40,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:02:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:02:40,285 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 20:02:40,320 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 20:02:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:02:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:02:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:02:40,327 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:02:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:02:40,328 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:02:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:02:40,328 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:02:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:02:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:02:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:02:40,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:02:40,330 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 20:02:40,434 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:02:40,436 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:02:40,751 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:02:40,752 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:02:40,937 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:02:40,937 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:02:40,938 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:02:40 BoogieIcfgContainer [2024-06-27 20:02:40,938 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:02:40,940 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:02:40,941 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:02:40,943 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:02:40,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:02:39" (1/4) ... [2024-06-27 20:02:40,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e152b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:02:40, skipping insertion in model container [2024-06-27 20:02:40,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:02:39" (2/4) ... [2024-06-27 20:02:40,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e152b62 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:02:40, skipping insertion in model container [2024-06-27 20:02:40,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:02:40" (3/4) ... [2024-06-27 20:02:40,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e152b62 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:02:40, skipping insertion in model container [2024-06-27 20:02:40,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:02:40" (4/4) ... [2024-06-27 20:02:40,947 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016_pso.opt_tso.opt.i [2024-06-27 20:02:40,961 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:02:40,961 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:02:40,961 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:02:40,997 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:02:41,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:02:41,040 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 20:02:41,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:02:41,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:02:41,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:02:41,045 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 20:02:41,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:02:41,060 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;@4f74f2c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:02:41,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:02:41,065 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:02:41,065 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:02:41,065 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:02:41,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:41,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:02:41,066 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 20:02:41,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash 397045706, now seen corresponding path program 1 times [2024-06-27 20:02:41,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:41,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459024246] [2024-06-27 20:02:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:41,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:41,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:41,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459024246] [2024-06-27 20:02:41,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459024246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:41,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:41,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:02:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520678785] [2024-06-27 20:02:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:41,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:02:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:42,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:02:42,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:02:42,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-27 20:02:42,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:42,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:42,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-27 20:02:42,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:42,359 INFO L124 PetriNetUnfolderBase]: 869/1398 cut-off events. [2024-06-27 20:02:42,359 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 20:02:42,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2776 conditions, 1398 events. 869/1398 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7015 event pairs, 566 based on Foata normal form. 1/1345 useless extension candidates. Maximal degree in co-relation 2764. Up to 1315 conditions per place. [2024-06-27 20:02:42,372 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 20:02:42,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-27 20:02:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:02:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:02:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-27 20:02:42,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-27 20:02:42,384 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 79 transitions. [2024-06-27 20:02:42,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-27 20:02:42,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:42,389 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 20:02:42,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 20:02:42,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 20:02:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 20:02:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:42,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:42,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:02:42,394 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 20:02:42,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash -691136087, now seen corresponding path program 1 times [2024-06-27 20:02:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:42,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721222065] [2024-06-27 20:02:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:43,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:43,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721222065] [2024-06-27 20:02:43,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721222065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:43,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:43,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:02:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568059949] [2024-06-27 20:02:43,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:43,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:02:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:02:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:02:43,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 20:02:43,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:43,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:43,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 20:02:43,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:43,264 INFO L124 PetriNetUnfolderBase]: 996/1549 cut-off events. [2024-06-27 20:02:43,264 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-06-27 20:02:43,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1549 events. 996/1549 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7582 event pairs, 519 based on Foata normal form. 3/1549 useless extension candidates. Maximal degree in co-relation 3552. Up to 1484 conditions per place. [2024-06-27 20:02:43,272 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-27 20:02:43,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 236 flow [2024-06-27 20:02:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:02:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:02:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-27 20:02:43,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 20:02:43,276 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 100 transitions. [2024-06-27 20:02:43,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 236 flow [2024-06-27 20:02:43,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:02:43,279 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 20:02:43,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 20:02:43,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 20:02:43,280 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 20:02:43,281 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 20:02:43,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:43,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:43,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:02:43,283 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 20:02:43,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash 439035286, now seen corresponding path program 1 times [2024-06-27 20:02:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:43,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254065886] [2024-06-27 20:02:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:43,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:43,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254065886] [2024-06-27 20:02:43,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254065886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:43,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:43,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:02:43,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838468961] [2024-06-27 20:02:43,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:43,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:02:43,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:43,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:02:43,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:02:44,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:02:44,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 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 20:02:44,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:44,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:02:44,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:44,345 INFO L124 PetriNetUnfolderBase]: 1265/1933 cut-off events. [2024-06-27 20:02:44,345 INFO L125 PetriNetUnfolderBase]: For 1101/1101 co-relation queries the response was YES. [2024-06-27 20:02:44,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4930 conditions, 1933 events. 1265/1933 cut-off events. For 1101/1101 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9175 event pairs, 445 based on Foata normal form. 6/1933 useless extension candidates. Maximal degree in co-relation 4916. Up to 1828 conditions per place. [2024-06-27 20:02:44,357 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 50 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-27 20:02:44,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 348 flow [2024-06-27 20:02:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 20:02:44,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-27 20:02:44,359 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 137 transitions. [2024-06-27 20:02:44,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 348 flow [2024-06-27 20:02:44,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 328 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:02:44,362 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-27 20:02:44,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 20:02:44,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-27 20:02:44,363 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-27 20:02:44,363 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 20:02:44,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:44,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:44,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:02:44,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:44,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash -30884977, now seen corresponding path program 1 times [2024-06-27 20:02:44,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:44,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268244621] [2024-06-27 20:02:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:44,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:44,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:44,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268244621] [2024-06-27 20:02:44,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268244621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:44,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:44,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:02:44,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896528786] [2024-06-27 20:02:44,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:44,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:02:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:44,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:02:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:02:44,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:02:44,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:44,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:44,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:02:44,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:45,269 INFO L124 PetriNetUnfolderBase]: 1085/1742 cut-off events. [2024-06-27 20:02:45,270 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-27 20:02:45,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4799 conditions, 1742 events. 1085/1742 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8600 event pairs, 442 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 4782. Up to 1611 conditions per place. [2024-06-27 20:02:45,279 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-27 20:02:45,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 325 flow [2024-06-27 20:02:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:02:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:02:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-27 20:02:45,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 20:02:45,280 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 100 transitions. [2024-06-27 20:02:45,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 325 flow [2024-06-27 20:02:45,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:45,283 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-27 20:02:45,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 20:02:45,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 20:02:45,284 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-27 20:02:45,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:45,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:45,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:45,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:02:45,285 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 20:02:45,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash -104308520, now seen corresponding path program 1 times [2024-06-27 20:02:45,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:45,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251797410] [2024-06-27 20:02:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:45,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:45,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:45,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251797410] [2024-06-27 20:02:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251797410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:45,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:45,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238139655] [2024-06-27 20:02:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:45,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:45,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:45,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 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 20:02:45,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:45,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:45,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:46,355 INFO L124 PetriNetUnfolderBase]: 1277/1951 cut-off events. [2024-06-27 20:02:46,356 INFO L125 PetriNetUnfolderBase]: For 3080/3080 co-relation queries the response was YES. [2024-06-27 20:02:46,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5931 conditions, 1951 events. 1277/1951 cut-off events. For 3080/3080 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9180 event pairs, 487 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 5912. Up to 1826 conditions per place. [2024-06-27 20:02:46,369 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-27 20:02:46,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 442 flow [2024-06-27 20:02:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 20:02:46,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-27 20:02:46,371 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 6 states and 122 transitions. [2024-06-27 20:02:46,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 442 flow [2024-06-27 20:02:46,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 422 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:46,380 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 258 flow [2024-06-27 20:02:46,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-27 20:02:46,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-27 20:02:46,382 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 258 flow [2024-06-27 20:02:46,383 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 20:02:46,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:46,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:46,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:02:46,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:46,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash -76453160, now seen corresponding path program 2 times [2024-06-27 20:02:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:46,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140992766] [2024-06-27 20:02:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:46,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:46,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140992766] [2024-06-27 20:02:46,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140992766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:46,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:46,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:46,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899437000] [2024-06-27 20:02:46,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:46,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:46,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:46,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:46,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:46,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 258 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 20:02:46,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:46,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:46,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:47,471 INFO L124 PetriNetUnfolderBase]: 1267/1939 cut-off events. [2024-06-27 20:02:47,472 INFO L125 PetriNetUnfolderBase]: For 4431/4435 co-relation queries the response was YES. [2024-06-27 20:02:47,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6371 conditions, 1939 events. 1267/1939 cut-off events. For 4431/4435 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9214 event pairs, 486 based on Foata normal form. 8/1946 useless extension candidates. Maximal degree in co-relation 6351. Up to 1818 conditions per place. [2024-06-27 20:02:47,482 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 47 selfloop transitions, 16 changer transitions 0/68 dead transitions. [2024-06-27 20:02:47,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 426 flow [2024-06-27 20:02:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:02:47,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 20:02:47,483 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 258 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:02:47,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 426 flow [2024-06-27 20:02:47,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 396 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 20:02:47,489 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 268 flow [2024-06-27 20:02:47,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-27 20:02:47,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-27 20:02:47,492 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 268 flow [2024-06-27 20:02:47,492 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 20:02:47,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:47,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:47,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:02:47,492 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 20:02:47,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1230031002, now seen corresponding path program 1 times [2024-06-27 20:02:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:47,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712049663] [2024-06-27 20:02:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:48,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:48,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712049663] [2024-06-27 20:02:48,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712049663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:48,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:48,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495706032] [2024-06-27 20:02:48,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:48,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:48,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:48,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:48,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:48,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:48,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:48,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:48,647 INFO L124 PetriNetUnfolderBase]: 1325/2043 cut-off events. [2024-06-27 20:02:48,647 INFO L125 PetriNetUnfolderBase]: For 5479/5481 co-relation queries the response was YES. [2024-06-27 20:02:48,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6837 conditions, 2043 events. 1325/2043 cut-off events. For 5479/5481 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9760 event pairs, 520 based on Foata normal form. 6/2048 useless extension candidates. Maximal degree in co-relation 6815. Up to 1909 conditions per place. [2024-06-27 20:02:48,660 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 63 selfloop transitions, 24 changer transitions 0/92 dead transitions. [2024-06-27 20:02:48,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 596 flow [2024-06-27 20:02:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:02:48,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 20:02:48,661 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 268 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:02:48,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 596 flow [2024-06-27 20:02:48,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 92 transitions, 540 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:48,667 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 378 flow [2024-06-27 20:02:48,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=378, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2024-06-27 20:02:48,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-27 20:02:48,667 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 378 flow [2024-06-27 20:02:48,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:48,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:48,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:48,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:02:48,668 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 20:02:48,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash -980276616, now seen corresponding path program 2 times [2024-06-27 20:02:48,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:48,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252896352] [2024-06-27 20:02:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:48,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:49,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:49,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252896352] [2024-06-27 20:02:49,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252896352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:49,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:49,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:49,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265655961] [2024-06-27 20:02:49,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:49,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:49,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:49,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 378 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:49,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:49,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:49,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:49,958 INFO L124 PetriNetUnfolderBase]: 1347/2082 cut-off events. [2024-06-27 20:02:49,959 INFO L125 PetriNetUnfolderBase]: For 7356/7360 co-relation queries the response was YES. [2024-06-27 20:02:49,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7503 conditions, 2082 events. 1347/2082 cut-off events. For 7356/7360 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10029 event pairs, 513 based on Foata normal form. 8/2089 useless extension candidates. Maximal degree in co-relation 7479. Up to 1918 conditions per place. [2024-06-27 20:02:49,972 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-27 20:02:49,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 668 flow [2024-06-27 20:02:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:02:49,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 20:02:49,973 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 378 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:02:49,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 668 flow [2024-06-27 20:02:49,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 628 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:49,984 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 437 flow [2024-06-27 20:02:49,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=437, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 20:02:49,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-27 20:02:49,985 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 437 flow [2024-06-27 20:02:49,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:49,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:49,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:49,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:02:49,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:49,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1147406520, now seen corresponding path program 3 times [2024-06-27 20:02:49,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:49,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144535245] [2024-06-27 20:02:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:49,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:50,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144535245] [2024-06-27 20:02:50,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144535245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:50,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:50,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:50,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51126452] [2024-06-27 20:02:50,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:50,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:50,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:50,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:50,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 437 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:50,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:50,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:50,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:51,317 INFO L124 PetriNetUnfolderBase]: 1369/2124 cut-off events. [2024-06-27 20:02:51,317 INFO L125 PetriNetUnfolderBase]: For 9881/9883 co-relation queries the response was YES. [2024-06-27 20:02:51,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8165 conditions, 2124 events. 1369/2124 cut-off events. For 9881/9883 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10297 event pairs, 449 based on Foata normal form. 4/2126 useless extension candidates. Maximal degree in co-relation 8140. Up to 1834 conditions per place. [2024-06-27 20:02:51,329 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2024-06-27 20:02:51,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 805 flow [2024-06-27 20:02:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:02:51,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-27 20:02:51,330 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 437 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:02:51,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 805 flow [2024-06-27 20:02:51,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 720 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:51,339 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 512 flow [2024-06-27 20:02:51,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2024-06-27 20:02:51,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 20:02:51,340 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 512 flow [2024-06-27 20:02:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:51,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:51,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:51,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:02:51,341 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 20:02:51,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash -114968346, now seen corresponding path program 4 times [2024-06-27 20:02:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:51,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740424707] [2024-06-27 20:02:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:51,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740424707] [2024-06-27 20:02:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740424707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:51,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:51,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:51,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633294505] [2024-06-27 20:02:51,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:51,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:51,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:51,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:51,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:51,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:51,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:51,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:52,532 INFO L124 PetriNetUnfolderBase]: 1359/2111 cut-off events. [2024-06-27 20:02:52,532 INFO L125 PetriNetUnfolderBase]: For 9995/9999 co-relation queries the response was YES. [2024-06-27 20:02:52,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8095 conditions, 2111 events. 1359/2111 cut-off events. For 9995/9999 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10258 event pairs, 456 based on Foata normal form. 4/2113 useless extension candidates. Maximal degree in co-relation 8069. Up to 1826 conditions per place. [2024-06-27 20:02:52,545 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 37 changer transitions 0/96 dead transitions. [2024-06-27 20:02:52,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 758 flow [2024-06-27 20:02:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:02:52,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 20:02:52,546 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 512 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:02:52,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 758 flow [2024-06-27 20:02:52,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 700 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:52,557 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 536 flow [2024-06-27 20:02:52,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=536, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-27 20:02:52,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-27 20:02:52,558 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 536 flow [2024-06-27 20:02:52,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:52,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:52,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:52,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:02:52,559 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 20:02:52,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash -973596612, now seen corresponding path program 1 times [2024-06-27 20:02:52,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:52,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492985127] [2024-06-27 20:02:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:52,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:53,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:53,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492985127] [2024-06-27 20:02:53,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492985127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:53,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:53,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:53,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152604706] [2024-06-27 20:02:53,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:53,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:53,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:53,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:53,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:53,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:02:53,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:53,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:53,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:02:53,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:54,031 INFO L124 PetriNetUnfolderBase]: 1181/1911 cut-off events. [2024-06-27 20:02:54,031 INFO L125 PetriNetUnfolderBase]: For 9708/9710 co-relation queries the response was YES. [2024-06-27 20:02:54,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7424 conditions, 1911 events. 1181/1911 cut-off events. For 9708/9710 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9579 event pairs, 396 based on Foata normal form. 4/1901 useless extension candidates. Maximal degree in co-relation 7396. Up to 1735 conditions per place. [2024-06-27 20:02:54,042 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2024-06-27 20:02:54,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 823 flow [2024-06-27 20:02:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:02:54,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 20:02:54,043 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 536 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:02:54,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 823 flow [2024-06-27 20:02:54,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 720 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:54,056 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 517 flow [2024-06-27 20:02:54,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=517, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-27 20:02:54,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-27 20:02:54,057 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 517 flow [2024-06-27 20:02:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:54,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:02:54,057 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:54,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1756359192, now seen corresponding path program 1 times [2024-06-27 20:02:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:54,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416989188] [2024-06-27 20:02:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:54,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:54,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:54,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416989188] [2024-06-27 20:02:54,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416989188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:54,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:54,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:02:54,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880766080] [2024-06-27 20:02:54,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:54,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:02:54,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:54,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:02:54,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:02:54,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:02:54,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 517 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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 20:02:54,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:54,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:02:54,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:54,904 INFO L124 PetriNetUnfolderBase]: 1070/1783 cut-off events. [2024-06-27 20:02:54,904 INFO L125 PetriNetUnfolderBase]: For 10588/10598 co-relation queries the response was YES. [2024-06-27 20:02:54,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7227 conditions, 1783 events. 1070/1783 cut-off events. For 10588/10598 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9215 event pairs, 401 based on Foata normal form. 9/1782 useless extension candidates. Maximal degree in co-relation 7197. Up to 1605 conditions per place. [2024-06-27 20:02:54,915 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 71 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-06-27 20:02:54,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 717 flow [2024-06-27 20:02:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:02:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:02:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-27 20:02:54,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-27 20:02:54,917 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 517 flow. Second operand 5 states and 99 transitions. [2024-06-27 20:02:54,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 717 flow [2024-06-27 20:02:54,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 90 transitions, 678 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:54,928 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 524 flow [2024-06-27 20:02:54,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-27 20:02:54,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 20:02:54,929 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 524 flow [2024-06-27 20:02:54,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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 20:02:54,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:54,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:54,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:02:54,930 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:54,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:54,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1387441020, now seen corresponding path program 1 times [2024-06-27 20:02:54,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:54,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610828306] [2024-06-27 20:02:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:54,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:55,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:55,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610828306] [2024-06-27 20:02:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610828306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:55,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:55,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:55,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556463678] [2024-06-27 20:02:55,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:55,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:55,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:02:55,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 524 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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 20:02:55,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:55,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:02:55,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:56,046 INFO L124 PetriNetUnfolderBase]: 1064/1770 cut-off events. [2024-06-27 20:02:56,047 INFO L125 PetriNetUnfolderBase]: For 11968/11978 co-relation queries the response was YES. [2024-06-27 20:02:56,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7442 conditions, 1770 events. 1064/1770 cut-off events. For 11968/11978 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9136 event pairs, 399 based on Foata normal form. 10/1763 useless extension candidates. Maximal degree in co-relation 7411. Up to 1591 conditions per place. [2024-06-27 20:02:56,057 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 73 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-27 20:02:56,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 742 flow [2024-06-27 20:02:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:02:56,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 20:02:56,058 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 524 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:02:56,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 742 flow [2024-06-27 20:02:56,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 718 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:56,067 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 556 flow [2024-06-27 20:02:56,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=556, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-27 20:02:56,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-27 20:02:56,069 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 556 flow [2024-06-27 20:02:56,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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 20:02:56,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:56,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:02:56,070 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 20:02:56,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1030818789, now seen corresponding path program 1 times [2024-06-27 20:02:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146166325] [2024-06-27 20:02:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:56,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:56,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146166325] [2024-06-27 20:02:56,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146166325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:56,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:56,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:56,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466441848] [2024-06-27 20:02:56,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:56,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:56,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:56,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:56,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:56,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:56,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 556 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:56,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:56,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:56,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:57,470 INFO L124 PetriNetUnfolderBase]: 1508/2370 cut-off events. [2024-06-27 20:02:57,471 INFO L125 PetriNetUnfolderBase]: For 19637/19641 co-relation queries the response was YES. [2024-06-27 20:02:57,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10590 conditions, 2370 events. 1508/2370 cut-off events. For 19637/19641 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11978 event pairs, 403 based on Foata normal form. 20/2389 useless extension candidates. Maximal degree in co-relation 10558. Up to 1872 conditions per place. [2024-06-27 20:02:57,486 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-06-27 20:02:57,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 132 transitions, 1048 flow [2024-06-27 20:02:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:02:57,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-27 20:02:57,488 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 556 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:02:57,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 132 transitions, 1048 flow [2024-06-27 20:02:57,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 132 transitions, 1014 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:57,506 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 626 flow [2024-06-27 20:02:57,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=626, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-27 20:02:57,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-27 20:02:57,507 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 626 flow [2024-06-27 20:02:57,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:57,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:57,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:02:57,508 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 20:02:57,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1987046843, now seen corresponding path program 2 times [2024-06-27 20:02:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:57,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922903540] [2024-06-27 20:02:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:58,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:58,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922903540] [2024-06-27 20:02:58,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922903540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:58,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:58,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:58,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248780118] [2024-06-27 20:02:58,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:58,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:58,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:58,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:58,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:58,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:58,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 626 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:58,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:58,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:58,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:58,951 INFO L124 PetriNetUnfolderBase]: 1472/2310 cut-off events. [2024-06-27 20:02:58,951 INFO L125 PetriNetUnfolderBase]: For 21061/21065 co-relation queries the response was YES. [2024-06-27 20:02:58,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10456 conditions, 2310 events. 1472/2310 cut-off events. For 21061/21065 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11540 event pairs, 507 based on Foata normal form. 24/2333 useless extension candidates. Maximal degree in co-relation 10423. Up to 1996 conditions per place. [2024-06-27 20:02:58,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 90 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2024-06-27 20:02:58,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 122 transitions, 984 flow [2024-06-27 20:02:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:02:58,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 20:02:58,966 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 626 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:02:58,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 122 transitions, 984 flow [2024-06-27 20:02:58,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 939 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:58,989 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 644 flow [2024-06-27 20:02:58,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-27 20:02:59,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-27 20:02:59,004 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 644 flow [2024-06-27 20:02:59,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:59,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:59,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:59,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:02:59,005 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 20:02:59,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1904006577, now seen corresponding path program 3 times [2024-06-27 20:02:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:59,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159032139] [2024-06-27 20:02:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:59,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:59,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:59,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159032139] [2024-06-27 20:02:59,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159032139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:59,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:59,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:59,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376004770] [2024-06-27 20:02:59,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:59,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:59,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:59,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:02:59,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 644 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:59,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:59,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:02:59,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:00,428 INFO L124 PetriNetUnfolderBase]: 1547/2441 cut-off events. [2024-06-27 20:03:00,428 INFO L125 PetriNetUnfolderBase]: For 24208/24210 co-relation queries the response was YES. [2024-06-27 20:03:00,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11195 conditions, 2441 events. 1547/2441 cut-off events. For 24208/24210 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12481 event pairs, 471 based on Foata normal form. 20/2459 useless extension candidates. Maximal degree in co-relation 11160. Up to 2026 conditions per place. [2024-06-27 20:03:00,442 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 40 changer transitions 0/121 dead transitions. [2024-06-27 20:03:00,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 121 transitions, 1010 flow [2024-06-27 20:03:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:03:00,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 20:03:00,443 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 644 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:03:00,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 121 transitions, 1010 flow [2024-06-27 20:03:00,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 949 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:00,461 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 692 flow [2024-06-27 20:03:00,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=692, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-27 20:03:00,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-27 20:03:00,462 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 692 flow [2024-06-27 20:03:00,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:00,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:00,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:00,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:03:00,462 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 20:03:00,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:00,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2102522711, now seen corresponding path program 1 times [2024-06-27 20:03:00,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:00,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211394216] [2024-06-27 20:03:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:00,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:01,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211394216] [2024-06-27 20:03:01,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211394216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:01,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:01,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:01,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894914556] [2024-06-27 20:03:01,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:01,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:01,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:01,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:01,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 692 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:01,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:01,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:01,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:02,009 INFO L124 PetriNetUnfolderBase]: 1564/2460 cut-off events. [2024-06-27 20:03:02,009 INFO L125 PetriNetUnfolderBase]: For 25974/25978 co-relation queries the response was YES. [2024-06-27 20:03:02,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11550 conditions, 2460 events. 1564/2460 cut-off events. For 25974/25978 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12510 event pairs, 477 based on Foata normal form. 8/2466 useless extension candidates. Maximal degree in co-relation 11514. Up to 2273 conditions per place. [2024-06-27 20:03:02,022 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 91 selfloop transitions, 26 changer transitions 0/122 dead transitions. [2024-06-27 20:03:02,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 1067 flow [2024-06-27 20:03:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:03:02,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:03:02,023 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 692 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:03:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 1067 flow [2024-06-27 20:03:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 978 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:02,044 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 720 flow [2024-06-27 20:03:02,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-06-27 20:03:02,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-27 20:03:02,045 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 720 flow [2024-06-27 20:03:02,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:02,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:02,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:02,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:03:02,045 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 20:03:02,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:02,046 INFO L85 PathProgramCache]: Analyzing trace with hash 49558087, now seen corresponding path program 1 times [2024-06-27 20:03:02,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:02,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367345654] [2024-06-27 20:03:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:02,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:02,569 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 20:03:02,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:02,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367345654] [2024-06-27 20:03:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367345654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:02,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:02,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:03:02,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090127389] [2024-06-27 20:03:02,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:02,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:03:02,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:02,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:03:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:03:02,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:02,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 720 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:02,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:02,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:02,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:03,019 INFO L124 PetriNetUnfolderBase]: 1464/2368 cut-off events. [2024-06-27 20:03:03,019 INFO L125 PetriNetUnfolderBase]: For 28225/28235 co-relation queries the response was YES. [2024-06-27 20:03:03,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11418 conditions, 2368 events. 1464/2368 cut-off events. For 28225/28235 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12532 event pairs, 494 based on Foata normal form. 10/2359 useless extension candidates. Maximal degree in co-relation 11380. Up to 2155 conditions per place. [2024-06-27 20:03:03,034 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 77 selfloop transitions, 21 changer transitions 0/110 dead transitions. [2024-06-27 20:03:03,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 110 transitions, 982 flow [2024-06-27 20:03:03,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:03:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:03:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:03:03,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 20:03:03,035 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 720 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:03:03,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 110 transitions, 982 flow [2024-06-27 20:03:03,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 110 transitions, 911 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:03,056 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 731 flow [2024-06-27 20:03:03,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=731, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2024-06-27 20:03:03,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-27 20:03:03,057 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 731 flow [2024-06-27 20:03:03,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:03,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:03,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:03,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:03:03,058 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 20:03:03,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2137594305, now seen corresponding path program 4 times [2024-06-27 20:03:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:03,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853832985] [2024-06-27 20:03:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:03,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:03,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853832985] [2024-06-27 20:03:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853832985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:03,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:03,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398849776] [2024-06-27 20:03:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:03,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:03,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:03,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:03,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 731 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:03,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:03,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:03,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:04,442 INFO L124 PetriNetUnfolderBase]: 1599/2532 cut-off events. [2024-06-27 20:03:04,443 INFO L125 PetriNetUnfolderBase]: For 32903/32907 co-relation queries the response was YES. [2024-06-27 20:03:04,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12417 conditions, 2532 events. 1599/2532 cut-off events. For 32903/32907 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13047 event pairs, 467 based on Foata normal form. 20/2550 useless extension candidates. Maximal degree in co-relation 12378. Up to 2114 conditions per place. [2024-06-27 20:03:04,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 41 changer transitions 0/128 dead transitions. [2024-06-27 20:03:04,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1119 flow [2024-06-27 20:03:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:03:04,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 20:03:04,457 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 731 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:03:04,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1119 flow [2024-06-27 20:03:04,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1067 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:04,483 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 794 flow [2024-06-27 20:03:04,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=794, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-06-27 20:03:04,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-27 20:03:04,483 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 794 flow [2024-06-27 20:03:04,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:04,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:04,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:04,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:03:04,484 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 20:03:04,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash 440088957, now seen corresponding path program 2 times [2024-06-27 20:03:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:04,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286783387] [2024-06-27 20:03:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:04,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:05,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:05,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286783387] [2024-06-27 20:03:05,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286783387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:05,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:05,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:05,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917326483] [2024-06-27 20:03:05,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:05,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:05,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:05,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:05,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:05,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:05,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 794 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:05,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:05,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:05,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:06,016 INFO L124 PetriNetUnfolderBase]: 1627/2588 cut-off events. [2024-06-27 20:03:06,017 INFO L125 PetriNetUnfolderBase]: For 34719/34727 co-relation queries the response was YES. [2024-06-27 20:03:06,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12953 conditions, 2588 events. 1627/2588 cut-off events. For 34719/34727 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13493 event pairs, 486 based on Foata normal form. 12/2599 useless extension candidates. Maximal degree in co-relation 12913. Up to 2373 conditions per place. [2024-06-27 20:03:06,031 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 29 changer transitions 0/129 dead transitions. [2024-06-27 20:03:06,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 129 transitions, 1189 flow [2024-06-27 20:03:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:03:06,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 20:03:06,033 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 794 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:03:06,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 129 transitions, 1189 flow [2024-06-27 20:03:06,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1092 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:06,066 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 837 flow [2024-06-27 20:03:06,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=837, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-27 20:03:06,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 20:03:06,066 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 837 flow [2024-06-27 20:03:06,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:06,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:06,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:06,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:03:06,067 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 20:03:06,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash 667990107, now seen corresponding path program 3 times [2024-06-27 20:03:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:06,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686060468] [2024-06-27 20:03:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:06,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:06,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:06,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686060468] [2024-06-27 20:03:06,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686060468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:06,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:06,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:06,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258813764] [2024-06-27 20:03:06,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:06,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:06,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:07,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:07,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:07,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:07,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:07,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:07,616 INFO L124 PetriNetUnfolderBase]: 1644/2615 cut-off events. [2024-06-27 20:03:07,616 INFO L125 PetriNetUnfolderBase]: For 37641/37649 co-relation queries the response was YES. [2024-06-27 20:03:07,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13378 conditions, 2615 events. 1644/2615 cut-off events. For 37641/37649 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13602 event pairs, 491 based on Foata normal form. 12/2626 useless extension candidates. Maximal degree in co-relation 13336. Up to 2400 conditions per place. [2024-06-27 20:03:07,630 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-27 20:03:07,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1232 flow [2024-06-27 20:03:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:03:07,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:03:07,632 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 837 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:03:07,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1232 flow [2024-06-27 20:03:07,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 1143 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:07,661 INFO L231 Difference]: Finished difference. Result has 101 places, 107 transitions, 878 flow [2024-06-27 20:03:07,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=878, PETRI_PLACES=101, PETRI_TRANSITIONS=107} [2024-06-27 20:03:07,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-27 20:03:07,661 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 107 transitions, 878 flow [2024-06-27 20:03:07,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:07,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:07,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:07,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:03:07,662 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 20:03:07,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:07,662 INFO L85 PathProgramCache]: Analyzing trace with hash 676560987, now seen corresponding path program 4 times [2024-06-27 20:03:07,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:07,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496042556] [2024-06-27 20:03:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:07,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:08,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496042556] [2024-06-27 20:03:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496042556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:08,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595937454] [2024-06-27 20:03:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:08,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:08,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:08,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 107 transitions, 878 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:08,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:08,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:08,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:09,114 INFO L124 PetriNetUnfolderBase]: 1636/2613 cut-off events. [2024-06-27 20:03:09,114 INFO L125 PetriNetUnfolderBase]: For 40333/40341 co-relation queries the response was YES. [2024-06-27 20:03:09,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13490 conditions, 2613 events. 1636/2613 cut-off events. For 40333/40341 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13708 event pairs, 437 based on Foata normal form. 12/2624 useless extension candidates. Maximal degree in co-relation 13447. Up to 2311 conditions per place. [2024-06-27 20:03:09,126 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 39 changer transitions 0/136 dead transitions. [2024-06-27 20:03:09,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 136 transitions, 1266 flow [2024-06-27 20:03:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:03:09,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 20:03:09,127 INFO L175 Difference]: Start difference. First operand has 101 places, 107 transitions, 878 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:03:09,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 136 transitions, 1266 flow [2024-06-27 20:03:09,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 1188 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:09,154 INFO L231 Difference]: Finished difference. Result has 105 places, 109 transitions, 929 flow [2024-06-27 20:03:09,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=105, PETRI_TRANSITIONS=109} [2024-06-27 20:03:09,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 20:03:09,155 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 109 transitions, 929 flow [2024-06-27 20:03:09,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:09,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:09,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:03:09,155 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:09,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash 559687267, now seen corresponding path program 2 times [2024-06-27 20:03:09,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:09,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617886137] [2024-06-27 20:03:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:09,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:09,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:09,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617886137] [2024-06-27 20:03:09,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617886137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:09,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:09,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:03:09,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38258521] [2024-06-27 20:03:09,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:09,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:03:09,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:03:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:03:09,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:09,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 109 transitions, 929 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:09,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:09,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:09,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:10,117 INFO L124 PetriNetUnfolderBase]: 1524/2481 cut-off events. [2024-06-27 20:03:10,117 INFO L125 PetriNetUnfolderBase]: For 43043/43051 co-relation queries the response was YES. [2024-06-27 20:03:10,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13038 conditions, 2481 events. 1524/2481 cut-off events. For 43043/43051 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13368 event pairs, 493 based on Foata normal form. 9/2472 useless extension candidates. Maximal degree in co-relation 12994. Up to 2240 conditions per place. [2024-06-27 20:03:10,134 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 78 selfloop transitions, 26 changer transitions 0/121 dead transitions. [2024-06-27 20:03:10,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 121 transitions, 1193 flow [2024-06-27 20:03:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:03:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:03:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 20:03:10,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:03:10,135 INFO L175 Difference]: Start difference. First operand has 105 places, 109 transitions, 929 flow. Second operand 6 states and 112 transitions. [2024-06-27 20:03:10,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 121 transitions, 1193 flow [2024-06-27 20:03:10,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 1082 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:10,166 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 912 flow [2024-06-27 20:03:10,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=912, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-06-27 20:03:10,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 20:03:10,167 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 912 flow [2024-06-27 20:03:10,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:10,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:10,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:10,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:03:10,167 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:10,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:10,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1152894159, now seen corresponding path program 1 times [2024-06-27 20:03:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:10,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904025493] [2024-06-27 20:03:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:10,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:10,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:10,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904025493] [2024-06-27 20:03:10,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904025493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:10,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:10,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:03:10,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084066746] [2024-06-27 20:03:10,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:10,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:03:10,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:10,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:03:10,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:03:10,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 912 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:11,130 INFO L124 PetriNetUnfolderBase]: 1473/2426 cut-off events. [2024-06-27 20:03:11,131 INFO L125 PetriNetUnfolderBase]: For 39500/39502 co-relation queries the response was YES. [2024-06-27 20:03:11,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12646 conditions, 2426 events. 1473/2426 cut-off events. For 39500/39502 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13038 event pairs, 433 based on Foata normal form. 2/2427 useless extension candidates. Maximal degree in co-relation 12601. Up to 2244 conditions per place. [2024-06-27 20:03:11,145 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 11 changer transitions 0/128 dead transitions. [2024-06-27 20:03:11,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 128 transitions, 1230 flow [2024-06-27 20:03:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:03:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:03:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 20:03:11,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:03:11,146 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 912 flow. Second operand 6 states and 114 transitions. [2024-06-27 20:03:11,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 128 transitions, 1230 flow [2024-06-27 20:03:11,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 128 transitions, 1158 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:11,186 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 904 flow [2024-06-27 20:03:11,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=904, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-27 20:03:11,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-27 20:03:11,186 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 904 flow [2024-06-27 20:03:11,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:11,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:11,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:11,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:03:11,187 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:11,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1153043889, now seen corresponding path program 2 times [2024-06-27 20:03:11,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:11,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982077275] [2024-06-27 20:03:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:11,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:11,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982077275] [2024-06-27 20:03:11,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982077275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:11,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:11,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:03:11,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208961109] [2024-06-27 20:03:11,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:11,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:03:11,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:11,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:03:11,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:03:11,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:11,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 904 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:11,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:11,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:11,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:12,118 INFO L124 PetriNetUnfolderBase]: 1475/2432 cut-off events. [2024-06-27 20:03:12,118 INFO L125 PetriNetUnfolderBase]: For 42286/42290 co-relation queries the response was YES. [2024-06-27 20:03:12,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12944 conditions, 2432 events. 1475/2432 cut-off events. For 42286/42290 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13106 event pairs, 437 based on Foata normal form. 4/2435 useless extension candidates. Maximal degree in co-relation 12898. Up to 2238 conditions per place. [2024-06-27 20:03:12,134 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 107 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-06-27 20:03:12,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 129 transitions, 1228 flow [2024-06-27 20:03:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:03:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:03:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 20:03:12,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:03:12,135 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 904 flow. Second operand 6 states and 114 transitions. [2024-06-27 20:03:12,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 129 transitions, 1228 flow [2024-06-27 20:03:12,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 129 transitions, 1186 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:12,173 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 942 flow [2024-06-27 20:03:12,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=942, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-06-27 20:03:12,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-27 20:03:12,173 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 942 flow [2024-06-27 20:03:12,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:12,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:12,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:12,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:03:12,174 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 20:03:12,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:12,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1263962901, now seen corresponding path program 1 times [2024-06-27 20:03:12,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:12,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520371728] [2024-06-27 20:03:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:12,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:13,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:13,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520371728] [2024-06-27 20:03:13,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520371728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:13,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:13,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344589464] [2024-06-27 20:03:13,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:13,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:13,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:13,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:13,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 942 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:13,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:13,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:13,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:13,873 INFO L124 PetriNetUnfolderBase]: 1765/2845 cut-off events. [2024-06-27 20:03:13,874 INFO L125 PetriNetUnfolderBase]: For 58076/58078 co-relation queries the response was YES. [2024-06-27 20:03:13,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15754 conditions, 2845 events. 1765/2845 cut-off events. For 58076/58078 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15344 event pairs, 492 based on Foata normal form. 12/2855 useless extension candidates. Maximal degree in co-relation 15707. Up to 2224 conditions per place. [2024-06-27 20:03:13,889 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 105 selfloop transitions, 55 changer transitions 0/165 dead transitions. [2024-06-27 20:03:13,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 165 transitions, 1519 flow [2024-06-27 20:03:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:03:13,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 20:03:13,890 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 942 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:03:13,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 165 transitions, 1519 flow [2024-06-27 20:03:13,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 165 transitions, 1461 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:13,937 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 1148 flow [2024-06-27 20:03:13,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1148, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-27 20:03:13,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-27 20:03:13,938 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 1148 flow [2024-06-27 20:03:13,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:13,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:13,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:13,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:03:13,938 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:13,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2035377103, now seen corresponding path program 1 times [2024-06-27 20:03:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:13,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989988806] [2024-06-27 20:03:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:14,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:14,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989988806] [2024-06-27 20:03:14,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989988806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:14,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:14,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:14,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791875025] [2024-06-27 20:03:14,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:14,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:14,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:14,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:14,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:14,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 1148 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:14,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:14,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:14,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:15,180 INFO L124 PetriNetUnfolderBase]: 1652/2722 cut-off events. [2024-06-27 20:03:15,181 INFO L125 PetriNetUnfolderBase]: For 61964/61974 co-relation queries the response was YES. [2024-06-27 20:03:15,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15789 conditions, 2722 events. 1652/2722 cut-off events. For 61964/61974 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15165 event pairs, 488 based on Foata normal form. 10/2713 useless extension candidates. Maximal degree in co-relation 15739. Up to 2460 conditions per place. [2024-06-27 20:03:15,199 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 24 changer transitions 0/146 dead transitions. [2024-06-27 20:03:15,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 1480 flow [2024-06-27 20:03:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:03:15,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-27 20:03:15,200 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 1148 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:03:15,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 1480 flow [2024-06-27 20:03:15,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 1380 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:15,250 INFO L231 Difference]: Finished difference. Result has 119 places, 131 transitions, 1138 flow [2024-06-27 20:03:15,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1138, PETRI_PLACES=119, PETRI_TRANSITIONS=131} [2024-06-27 20:03:15,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-27 20:03:15,250 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 131 transitions, 1138 flow [2024-06-27 20:03:15,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:15,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:15,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:15,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:03:15,251 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 20:03:15,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:15,251 INFO L85 PathProgramCache]: Analyzing trace with hash -767142021, now seen corresponding path program 2 times [2024-06-27 20:03:15,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:15,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930191117] [2024-06-27 20:03:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:15,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:16,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:16,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930191117] [2024-06-27 20:03:16,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930191117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:16,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:16,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:16,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703319107] [2024-06-27 20:03:16,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:16,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:16,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:16,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:16,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:16,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 131 transitions, 1138 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:16,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:16,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:16,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:17,046 INFO L124 PetriNetUnfolderBase]: 1885/3062 cut-off events. [2024-06-27 20:03:17,046 INFO L125 PetriNetUnfolderBase]: For 67726/67728 co-relation queries the response was YES. [2024-06-27 20:03:17,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 3062 events. 1885/3062 cut-off events. For 67726/67728 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16977 event pairs, 486 based on Foata normal form. 14/3075 useless extension candidates. Maximal degree in co-relation 17380. Up to 2521 conditions per place. [2024-06-27 20:03:17,063 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 64 changer transitions 0/176 dead transitions. [2024-06-27 20:03:17,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 176 transitions, 1727 flow [2024-06-27 20:03:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:03:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:03:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:03:17,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 20:03:17,065 INFO L175 Difference]: Start difference. First operand has 119 places, 131 transitions, 1138 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:03:17,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 176 transitions, 1727 flow [2024-06-27 20:03:17,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1655 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:17,142 INFO L231 Difference]: Finished difference. Result has 127 places, 141 transitions, 1344 flow [2024-06-27 20:03:17,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1344, PETRI_PLACES=127, PETRI_TRANSITIONS=141} [2024-06-27 20:03:17,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-27 20:03:17,143 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 141 transitions, 1344 flow [2024-06-27 20:03:17,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:17,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:17,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:17,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:03:17,144 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 20:03:17,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1585033225, now seen corresponding path program 3 times [2024-06-27 20:03:17,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:17,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222047809] [2024-06-27 20:03:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:17,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:18,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:18,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222047809] [2024-06-27 20:03:18,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222047809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:18,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:18,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:18,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434247917] [2024-06-27 20:03:18,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:18,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:18,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:18,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:18,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:18,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 141 transitions, 1344 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:18,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:18,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:18,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:18,828 INFO L124 PetriNetUnfolderBase]: 1967/3224 cut-off events. [2024-06-27 20:03:18,828 INFO L125 PetriNetUnfolderBase]: For 75839/75843 co-relation queries the response was YES. [2024-06-27 20:03:18,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18770 conditions, 3224 events. 1967/3224 cut-off events. For 75839/75843 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18278 event pairs, 381 based on Foata normal form. 16/3239 useless extension candidates. Maximal degree in co-relation 18715. Up to 2067 conditions per place. [2024-06-27 20:03:18,852 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 101 selfloop transitions, 74 changer transitions 0/180 dead transitions. [2024-06-27 20:03:18,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 180 transitions, 1947 flow [2024-06-27 20:03:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:03:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:03:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:03:18,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:03:18,854 INFO L175 Difference]: Start difference. First operand has 127 places, 141 transitions, 1344 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:03:18,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 180 transitions, 1947 flow [2024-06-27 20:03:18,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 180 transitions, 1870 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 20:03:18,933 INFO L231 Difference]: Finished difference. Result has 136 places, 143 transitions, 1501 flow [2024-06-27 20:03:18,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1501, PETRI_PLACES=136, PETRI_TRANSITIONS=143} [2024-06-27 20:03:18,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 20:03:18,934 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 143 transitions, 1501 flow [2024-06-27 20:03:18,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:18,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:18,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:18,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:03:18,935 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 20:03:18,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:18,936 INFO L85 PathProgramCache]: Analyzing trace with hash 757856921, now seen corresponding path program 4 times [2024-06-27 20:03:18,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:18,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006209595] [2024-06-27 20:03:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:18,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:19,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:19,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006209595] [2024-06-27 20:03:19,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006209595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:19,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:19,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:19,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349863869] [2024-06-27 20:03:19,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:19,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:19,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:19,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:19,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:19,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 143 transitions, 1501 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:19,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:19,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:19,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:20,557 INFO L124 PetriNetUnfolderBase]: 1947/3192 cut-off events. [2024-06-27 20:03:20,557 INFO L125 PetriNetUnfolderBase]: For 76247/76253 co-relation queries the response was YES. [2024-06-27 20:03:20,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18383 conditions, 3192 events. 1947/3192 cut-off events. For 76247/76253 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18132 event pairs, 538 based on Foata normal form. 13/3203 useless extension candidates. Maximal degree in co-relation 18325. Up to 2631 conditions per place. [2024-06-27 20:03:20,578 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 110 selfloop transitions, 60 changer transitions 0/175 dead transitions. [2024-06-27 20:03:20,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 175 transitions, 1925 flow [2024-06-27 20:03:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:03:20,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 20:03:20,579 INFO L175 Difference]: Start difference. First operand has 136 places, 143 transitions, 1501 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:03:20,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 175 transitions, 1925 flow [2024-06-27 20:03:20,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 1769 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:20,714 INFO L231 Difference]: Finished difference. Result has 137 places, 142 transitions, 1425 flow [2024-06-27 20:03:20,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1425, PETRI_PLACES=137, PETRI_TRANSITIONS=142} [2024-06-27 20:03:20,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-27 20:03:20,714 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 1425 flow [2024-06-27 20:03:20,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:20,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:20,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:20,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:03:20,715 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:20,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1890980571, now seen corresponding path program 2 times [2024-06-27 20:03:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:20,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37953328] [2024-06-27 20:03:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:20,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:21,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:21,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37953328] [2024-06-27 20:03:21,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37953328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:21,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:21,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:21,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526515475] [2024-06-27 20:03:21,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:21,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:21,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:21,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:21,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:21,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:21,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 1425 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:21,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:21,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:21,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:21,959 INFO L124 PetriNetUnfolderBase]: 1802/2995 cut-off events. [2024-06-27 20:03:21,960 INFO L125 PetriNetUnfolderBase]: For 75066/75084 co-relation queries the response was YES. [2024-06-27 20:03:21,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17392 conditions, 2995 events. 1802/2995 cut-off events. For 75066/75084 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17283 event pairs, 524 based on Foata normal form. 13/2970 useless extension candidates. Maximal degree in co-relation 17333. Up to 2708 conditions per place. [2024-06-27 20:03:21,980 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 106 selfloop transitions, 37 changer transitions 0/160 dead transitions. [2024-06-27 20:03:21,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 160 transitions, 1875 flow [2024-06-27 20:03:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:03:21,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-27 20:03:21,982 INFO L175 Difference]: Start difference. First operand has 137 places, 142 transitions, 1425 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:03:21,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 160 transitions, 1875 flow [2024-06-27 20:03:22,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 160 transitions, 1662 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-27 20:03:22,047 INFO L231 Difference]: Finished difference. Result has 135 places, 150 transitions, 1393 flow [2024-06-27 20:03:22,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1393, PETRI_PLACES=135, PETRI_TRANSITIONS=150} [2024-06-27 20:03:22,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 20:03:22,048 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 150 transitions, 1393 flow [2024-06-27 20:03:22,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:22,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:22,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:22,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:03:22,048 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:22,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:22,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1890564861, now seen corresponding path program 3 times [2024-06-27 20:03:22,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:22,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141113957] [2024-06-27 20:03:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:22,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:22,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:22,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141113957] [2024-06-27 20:03:22,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141113957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:22,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:22,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142320416] [2024-06-27 20:03:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:22,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:22,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 1393 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:22,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:22,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:22,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:23,286 INFO L124 PetriNetUnfolderBase]: 1798/2998 cut-off events. [2024-06-27 20:03:23,287 INFO L125 PetriNetUnfolderBase]: For 76915/76933 co-relation queries the response was YES. [2024-06-27 20:03:23,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17272 conditions, 2998 events. 1798/2998 cut-off events. For 76915/76933 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17359 event pairs, 487 based on Foata normal form. 12/2980 useless extension candidates. Maximal degree in co-relation 17215. Up to 2717 conditions per place. [2024-06-27 20:03:23,307 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 113 selfloop transitions, 30 changer transitions 0/160 dead transitions. [2024-06-27 20:03:23,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 1710 flow [2024-06-27 20:03:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:03:23,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:03:23,309 INFO L175 Difference]: Start difference. First operand has 135 places, 150 transitions, 1393 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:03:23,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 1710 flow [2024-06-27 20:03:23,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 160 transitions, 1625 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:03:23,371 INFO L231 Difference]: Finished difference. Result has 139 places, 151 transitions, 1383 flow [2024-06-27 20:03:23,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1383, PETRI_PLACES=139, PETRI_TRANSITIONS=151} [2024-06-27 20:03:23,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-27 20:03:23,372 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 151 transitions, 1383 flow [2024-06-27 20:03:23,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:23,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:23,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:23,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:03:23,373 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:23,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1379976849, now seen corresponding path program 1 times [2024-06-27 20:03:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:23,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860678905] [2024-06-27 20:03:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:23,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:24,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:24,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860678905] [2024-06-27 20:03:24,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860678905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:24,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:24,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:24,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392373088] [2024-06-27 20:03:24,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:24,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:24,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:24,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:24,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 151 transitions, 1383 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:24,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:24,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:24,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:24,612 INFO L124 PetriNetUnfolderBase]: 1863/3108 cut-off events. [2024-06-27 20:03:24,612 INFO L125 PetriNetUnfolderBase]: For 81047/81051 co-relation queries the response was YES. [2024-06-27 20:03:24,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17882 conditions, 3108 events. 1863/3108 cut-off events. For 81047/81051 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17995 event pairs, 489 based on Foata normal form. 2/3109 useless extension candidates. Maximal degree in co-relation 17823. Up to 2843 conditions per place. [2024-06-27 20:03:24,633 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 14 changer transitions 0/169 dead transitions. [2024-06-27 20:03:24,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 169 transitions, 1787 flow [2024-06-27 20:03:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:03:24,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:03:24,634 INFO L175 Difference]: Start difference. First operand has 139 places, 151 transitions, 1383 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:03:24,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 169 transitions, 1787 flow [2024-06-27 20:03:24,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 169 transitions, 1723 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:24,720 INFO L231 Difference]: Finished difference. Result has 141 places, 154 transitions, 1401 flow [2024-06-27 20:03:24,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1401, PETRI_PLACES=141, PETRI_TRANSITIONS=154} [2024-06-27 20:03:24,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 20:03:24,721 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 154 transitions, 1401 flow [2024-06-27 20:03:24,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:24,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:24,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:24,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:03:24,721 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:24,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1713617853, now seen corresponding path program 1 times [2024-06-27 20:03:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:24,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747424673] [2024-06-27 20:03:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:24,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:25,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:25,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747424673] [2024-06-27 20:03:25,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747424673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:25,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:25,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:25,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181753691] [2024-06-27 20:03:25,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:25,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:25,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:25,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:25,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 154 transitions, 1401 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:25,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:25,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:25,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:25,890 INFO L124 PetriNetUnfolderBase]: 1888/3145 cut-off events. [2024-06-27 20:03:25,890 INFO L125 PetriNetUnfolderBase]: For 88832/88836 co-relation queries the response was YES. [2024-06-27 20:03:25,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18449 conditions, 3145 events. 1888/3145 cut-off events. For 88832/88836 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18185 event pairs, 489 based on Foata normal form. 7/3151 useless extension candidates. Maximal degree in co-relation 18389. Up to 2870 conditions per place. [2024-06-27 20:03:25,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 147 selfloop transitions, 15 changer transitions 0/172 dead transitions. [2024-06-27 20:03:25,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 172 transitions, 1811 flow [2024-06-27 20:03:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:03:25,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:03:25,914 INFO L175 Difference]: Start difference. First operand has 141 places, 154 transitions, 1401 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:03:25,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 172 transitions, 1811 flow [2024-06-27 20:03:25,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 172 transitions, 1751 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:25,997 INFO L231 Difference]: Finished difference. Result has 143 places, 158 transitions, 1430 flow [2024-06-27 20:03:25,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1430, PETRI_PLACES=143, PETRI_TRANSITIONS=158} [2024-06-27 20:03:25,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-27 20:03:25,998 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 158 transitions, 1430 flow [2024-06-27 20:03:25,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:25,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:25,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:25,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:03:25,998 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:25,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1890986523, now seen corresponding path program 2 times [2024-06-27 20:03:25,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:25,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782371647] [2024-06-27 20:03:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:26,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:26,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782371647] [2024-06-27 20:03:26,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782371647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:26,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:26,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:26,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019526781] [2024-06-27 20:03:26,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:26,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:26,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:26,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:26,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:26,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:26,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 158 transitions, 1430 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:26,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:26,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:26,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:27,296 INFO L124 PetriNetUnfolderBase]: 1904/3172 cut-off events. [2024-06-27 20:03:27,296 INFO L125 PetriNetUnfolderBase]: For 93431/93437 co-relation queries the response was YES. [2024-06-27 20:03:27,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19222 conditions, 3172 events. 1904/3172 cut-off events. For 93431/93437 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18426 event pairs, 492 based on Foata normal form. 5/3176 useless extension candidates. Maximal degree in co-relation 19161. Up to 2869 conditions per place. [2024-06-27 20:03:27,319 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-27 20:03:27,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 181 transitions, 2011 flow [2024-06-27 20:03:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:03:27,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:03:27,320 INFO L175 Difference]: Start difference. First operand has 143 places, 158 transitions, 1430 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:03:27,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 181 transitions, 2011 flow [2024-06-27 20:03:27,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 181 transitions, 1913 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:27,394 INFO L231 Difference]: Finished difference. Result has 146 places, 170 transitions, 1570 flow [2024-06-27 20:03:27,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1570, PETRI_PLACES=146, PETRI_TRANSITIONS=170} [2024-06-27 20:03:27,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 20:03:27,395 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 170 transitions, 1570 flow [2024-06-27 20:03:27,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:27,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:27,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:27,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:03:27,395 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:27,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1890749373, now seen corresponding path program 3 times [2024-06-27 20:03:27,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:27,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044413067] [2024-06-27 20:03:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:27,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:28,076 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 20:03:28,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:28,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044413067] [2024-06-27 20:03:28,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044413067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:28,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:28,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:28,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658564565] [2024-06-27 20:03:28,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:28,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:28,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:28,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:28,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 170 transitions, 1570 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:28,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:28,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:28,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:28,603 INFO L124 PetriNetUnfolderBase]: 1902/3170 cut-off events. [2024-06-27 20:03:28,603 INFO L125 PetriNetUnfolderBase]: For 100558/100564 co-relation queries the response was YES. [2024-06-27 20:03:28,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19751 conditions, 3170 events. 1902/3170 cut-off events. For 100558/100564 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18429 event pairs, 490 based on Foata normal form. 9/3178 useless extension candidates. Maximal degree in co-relation 19688. Up to 2882 conditions per place. [2024-06-27 20:03:28,626 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 23 changer transitions 0/186 dead transitions. [2024-06-27 20:03:28,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 186 transitions, 2035 flow [2024-06-27 20:03:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:03:28,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:03:28,627 INFO L175 Difference]: Start difference. First operand has 146 places, 170 transitions, 1570 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:03:28,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 186 transitions, 2035 flow [2024-06-27 20:03:28,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 186 transitions, 1961 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 20:03:28,710 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1620 flow [2024-06-27 20:03:28,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1620, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2024-06-27 20:03:28,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-27 20:03:28,711 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1620 flow [2024-06-27 20:03:28,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:28,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:28,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:28,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:03:28,712 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:28,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 374995494, now seen corresponding path program 1 times [2024-06-27 20:03:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:28,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636252414] [2024-06-27 20:03:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:29,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:29,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636252414] [2024-06-27 20:03:29,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636252414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:29,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:29,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:29,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944430157] [2024-06-27 20:03:29,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:29,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:29,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:29,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:29,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1620 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:29,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:29,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:29,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:29,834 INFO L124 PetriNetUnfolderBase]: 2012/3288 cut-off events. [2024-06-27 20:03:29,834 INFO L125 PetriNetUnfolderBase]: For 104336/104342 co-relation queries the response was YES. [2024-06-27 20:03:29,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21016 conditions, 3288 events. 2012/3288 cut-off events. For 104336/104342 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18694 event pairs, 503 based on Foata normal form. 8/3295 useless extension candidates. Maximal degree in co-relation 20951. Up to 3059 conditions per place. [2024-06-27 20:03:29,858 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-06-27 20:03:29,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 197 transitions, 2131 flow [2024-06-27 20:03:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:03:29,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:03:29,859 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1620 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:03:29,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 197 transitions, 2131 flow [2024-06-27 20:03:29,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 197 transitions, 2039 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:29,971 INFO L231 Difference]: Finished difference. Result has 152 places, 177 transitions, 1632 flow [2024-06-27 20:03:29,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1632, PETRI_PLACES=152, PETRI_TRANSITIONS=177} [2024-06-27 20:03:29,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 20:03:29,971 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 177 transitions, 1632 flow [2024-06-27 20:03:29,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:29,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:29,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:29,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:03:29,972 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:29,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1475961584, now seen corresponding path program 2 times [2024-06-27 20:03:29,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:29,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118534786] [2024-06-27 20:03:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:29,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:30,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:30,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118534786] [2024-06-27 20:03:30,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118534786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:30,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:30,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:30,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597980356] [2024-06-27 20:03:30,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:30,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:30,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:30,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:30,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 1632 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:30,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:30,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:30,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:31,134 INFO L124 PetriNetUnfolderBase]: 2038/3330 cut-off events. [2024-06-27 20:03:31,134 INFO L125 PetriNetUnfolderBase]: For 112192/112198 co-relation queries the response was YES. [2024-06-27 20:03:31,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21771 conditions, 3330 events. 2038/3330 cut-off events. For 112192/112198 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19029 event pairs, 504 based on Foata normal form. 8/3337 useless extension candidates. Maximal degree in co-relation 21705. Up to 3075 conditions per place. [2024-06-27 20:03:31,160 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 28 changer transitions 0/204 dead transitions. [2024-06-27 20:03:31,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 204 transitions, 2308 flow [2024-06-27 20:03:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:03:31,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:03:31,161 INFO L175 Difference]: Start difference. First operand has 152 places, 177 transitions, 1632 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:03:31,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 204 transitions, 2308 flow [2024-06-27 20:03:31,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 204 transitions, 2243 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:31,289 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 1772 flow [2024-06-27 20:03:31,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1772, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-27 20:03:31,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-27 20:03:31,289 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 1772 flow [2024-06-27 20:03:31,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:31,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:31,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:31,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:03:31,290 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:31,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:31,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1327818092, now seen corresponding path program 1 times [2024-06-27 20:03:31,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:31,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5939462] [2024-06-27 20:03:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:32,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:32,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5939462] [2024-06-27 20:03:32,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5939462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:32,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:32,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:32,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588754909] [2024-06-27 20:03:32,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:32,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:32,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:32,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:32,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 1772 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:32,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:32,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:32,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:32,761 INFO L124 PetriNetUnfolderBase]: 1900/3155 cut-off events. [2024-06-27 20:03:32,762 INFO L125 PetriNetUnfolderBase]: For 116954/116970 co-relation queries the response was YES. [2024-06-27 20:03:32,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21386 conditions, 3155 events. 1900/3155 cut-off events. For 116954/116970 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18314 event pairs, 477 based on Foata normal form. 11/3142 useless extension candidates. Maximal degree in co-relation 21318. Up to 2825 conditions per place. [2024-06-27 20:03:32,786 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 30 changer transitions 0/203 dead transitions. [2024-06-27 20:03:32,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 203 transitions, 2220 flow [2024-06-27 20:03:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:03:32,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 20:03:32,787 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 1772 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:03:32,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 203 transitions, 2220 flow [2024-06-27 20:03:32,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 203 transitions, 2152 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 20:03:32,894 INFO L231 Difference]: Finished difference. Result has 161 places, 188 transitions, 1816 flow [2024-06-27 20:03:32,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1816, PETRI_PLACES=161, PETRI_TRANSITIONS=188} [2024-06-27 20:03:32,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-27 20:03:32,894 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 188 transitions, 1816 flow [2024-06-27 20:03:32,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:32,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:32,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:32,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:03:32,895 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 20:03:32,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1523285586, now seen corresponding path program 3 times [2024-06-27 20:03:32,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:32,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964546476] [2024-06-27 20:03:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:32,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:33,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:33,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964546476] [2024-06-27 20:03:33,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964546476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:33,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:33,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:33,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409020775] [2024-06-27 20:03:33,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:33,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:33,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:33,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:33,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:33,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 188 transitions, 1816 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:33,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:33,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:33,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:34,028 INFO L124 PetriNetUnfolderBase]: 2042/3337 cut-off events. [2024-06-27 20:03:34,028 INFO L125 PetriNetUnfolderBase]: For 122191/122199 co-relation queries the response was YES. [2024-06-27 20:03:34,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22667 conditions, 3337 events. 2042/3337 cut-off events. For 122191/122199 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19026 event pairs, 503 based on Foata normal form. 10/3346 useless extension candidates. Maximal degree in co-relation 22597. Up to 3101 conditions per place. [2024-06-27 20:03:34,054 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 22 changer transitions 0/207 dead transitions. [2024-06-27 20:03:34,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 207 transitions, 2308 flow [2024-06-27 20:03:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:03:34,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 20:03:34,055 INFO L175 Difference]: Start difference. First operand has 161 places, 188 transitions, 1816 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:03:34,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 207 transitions, 2308 flow [2024-06-27 20:03:34,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 207 transitions, 2182 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:34,172 INFO L231 Difference]: Finished difference. Result has 162 places, 189 transitions, 1757 flow [2024-06-27 20:03:34,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1757, PETRI_PLACES=162, PETRI_TRANSITIONS=189} [2024-06-27 20:03:34,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 20:03:34,173 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 189 transitions, 1757 flow [2024-06-27 20:03:34,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:34,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:34,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:03:34,174 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1582533158, now seen corresponding path program 4 times [2024-06-27 20:03:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:34,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561582111] [2024-06-27 20:03:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:34,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:34,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561582111] [2024-06-27 20:03:34,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561582111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:34,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320570856] [2024-06-27 20:03:34,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:34,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:34,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:34,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:34,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 189 transitions, 1757 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:34,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:34,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:35,317 INFO L124 PetriNetUnfolderBase]: 2052/3351 cut-off events. [2024-06-27 20:03:35,317 INFO L125 PetriNetUnfolderBase]: For 127211/127219 co-relation queries the response was YES. [2024-06-27 20:03:35,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22819 conditions, 3351 events. 2052/3351 cut-off events. For 127211/127219 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19057 event pairs, 503 based on Foata normal form. 10/3360 useless extension candidates. Maximal degree in co-relation 22748. Up to 3095 conditions per place. [2024-06-27 20:03:35,344 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 173 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2024-06-27 20:03:35,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 208 transitions, 2300 flow [2024-06-27 20:03:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:03:35,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:03:35,345 INFO L175 Difference]: Start difference. First operand has 162 places, 189 transitions, 1757 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:03:35,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 208 transitions, 2300 flow [2024-06-27 20:03:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 208 transitions, 2226 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:35,464 INFO L231 Difference]: Finished difference. Result has 162 places, 192 transitions, 1815 flow [2024-06-27 20:03:35,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1815, PETRI_PLACES=162, PETRI_TRANSITIONS=192} [2024-06-27 20:03:35,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 20:03:35,465 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 192 transitions, 1815 flow [2024-06-27 20:03:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:35,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:35,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:35,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:03:35,466 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:35,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1522038234, now seen corresponding path program 5 times [2024-06-27 20:03:35,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:35,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751679050] [2024-06-27 20:03:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:35,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:36,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751679050] [2024-06-27 20:03:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751679050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:36,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:36,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410361314] [2024-06-27 20:03:36,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:36,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:36,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:36,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:36,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 192 transitions, 1815 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:36,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:36,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:36,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:36,646 INFO L124 PetriNetUnfolderBase]: 2070/3383 cut-off events. [2024-06-27 20:03:36,646 INFO L125 PetriNetUnfolderBase]: For 135862/135872 co-relation queries the response was YES. [2024-06-27 20:03:36,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23562 conditions, 3383 events. 2070/3383 cut-off events. For 135862/135872 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19316 event pairs, 513 based on Foata normal form. 12/3394 useless extension candidates. Maximal degree in co-relation 23490. Up to 3080 conditions per place. [2024-06-27 20:03:36,675 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 45 changer transitions 0/215 dead transitions. [2024-06-27 20:03:36,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 215 transitions, 2543 flow [2024-06-27 20:03:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:03:36,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 20:03:36,676 INFO L175 Difference]: Start difference. First operand has 162 places, 192 transitions, 1815 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:03:36,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 215 transitions, 2543 flow [2024-06-27 20:03:36,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 215 transitions, 2439 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:36,807 INFO L231 Difference]: Finished difference. Result has 165 places, 200 transitions, 1973 flow [2024-06-27 20:03:36,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1973, PETRI_PLACES=165, PETRI_TRANSITIONS=200} [2024-06-27 20:03:36,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-27 20:03:36,808 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 200 transitions, 1973 flow [2024-06-27 20:03:36,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:36,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:36,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:36,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:03:36,809 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:36,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:36,809 INFO L85 PathProgramCache]: Analyzing trace with hash 994293570, now seen corresponding path program 6 times [2024-06-27 20:03:36,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:36,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452048104] [2024-06-27 20:03:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:36,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:37,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:37,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452048104] [2024-06-27 20:03:37,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452048104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:37,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:37,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673228686] [2024-06-27 20:03:37,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:37,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:37,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:37,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 200 transitions, 1973 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:37,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:37,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:37,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:37,955 INFO L124 PetriNetUnfolderBase]: 2064/3373 cut-off events. [2024-06-27 20:03:37,955 INFO L125 PetriNetUnfolderBase]: For 142447/142457 co-relation queries the response was YES. [2024-06-27 20:03:37,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23868 conditions, 3373 events. 2064/3373 cut-off events. For 142447/142457 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19305 event pairs, 514 based on Foata normal form. 12/3384 useless extension candidates. Maximal degree in co-relation 23794. Up to 3075 conditions per place. [2024-06-27 20:03:37,985 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 46 changer transitions 0/215 dead transitions. [2024-06-27 20:03:37,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 215 transitions, 2495 flow [2024-06-27 20:03:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:03:37,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:03:37,986 INFO L175 Difference]: Start difference. First operand has 165 places, 200 transitions, 1973 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:03:37,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 215 transitions, 2495 flow [2024-06-27 20:03:38,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 215 transitions, 2313 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:38,111 INFO L231 Difference]: Finished difference. Result has 168 places, 201 transitions, 1910 flow [2024-06-27 20:03:38,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1910, PETRI_PLACES=168, PETRI_TRANSITIONS=201} [2024-06-27 20:03:38,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-27 20:03:38,112 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 201 transitions, 1910 flow [2024-06-27 20:03:38,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:38,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:38,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:38,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:03:38,113 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:38,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1522030298, now seen corresponding path program 2 times [2024-06-27 20:03:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:38,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63879883] [2024-06-27 20:03:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:38,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:38,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:38,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63879883] [2024-06-27 20:03:38,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63879883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:38,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:38,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222919685] [2024-06-27 20:03:38,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:38,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:38,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:39,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:39,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 201 transitions, 1910 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:39,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:39,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:39,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:39,536 INFO L124 PetriNetUnfolderBase]: 1947/3213 cut-off events. [2024-06-27 20:03:39,537 INFO L125 PetriNetUnfolderBase]: For 144602/144610 co-relation queries the response was YES. [2024-06-27 20:03:39,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22790 conditions, 3213 events. 1947/3213 cut-off events. For 144602/144610 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18574 event pairs, 485 based on Foata normal form. 11/3194 useless extension candidates. Maximal degree in co-relation 22715. Up to 2870 conditions per place. [2024-06-27 20:03:39,565 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 37 changer transitions 0/215 dead transitions. [2024-06-27 20:03:39,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 215 transitions, 2370 flow [2024-06-27 20:03:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:03:39,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:03:39,566 INFO L175 Difference]: Start difference. First operand has 168 places, 201 transitions, 1910 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:03:39,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 215 transitions, 2370 flow [2024-06-27 20:03:39,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 215 transitions, 2299 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:39,733 INFO L231 Difference]: Finished difference. Result has 172 places, 204 transitions, 1973 flow [2024-06-27 20:03:39,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1973, PETRI_PLACES=172, PETRI_TRANSITIONS=204} [2024-06-27 20:03:39,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 20:03:39,733 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 204 transitions, 1973 flow [2024-06-27 20:03:39,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:39,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:39,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:39,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:03:39,734 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:39,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1001920066, now seen corresponding path program 3 times [2024-06-27 20:03:39,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:39,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902877820] [2024-06-27 20:03:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:39,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:40,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:40,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902877820] [2024-06-27 20:03:40,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902877820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:40,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16589305] [2024-06-27 20:03:40,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:40,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:40,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:40,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:40,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 204 transitions, 1973 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:40,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:40,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:40,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:41,339 INFO L124 PetriNetUnfolderBase]: 1946/3223 cut-off events. [2024-06-27 20:03:41,340 INFO L125 PetriNetUnfolderBase]: For 149829/149855 co-relation queries the response was YES. [2024-06-27 20:03:41,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23293 conditions, 3223 events. 1946/3223 cut-off events. For 149829/149855 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18729 event pairs, 486 based on Foata normal form. 11/3209 useless extension candidates. Maximal degree in co-relation 23217. Up to 2922 conditions per place. [2024-06-27 20:03:41,368 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 17 changer transitions 0/218 dead transitions. [2024-06-27 20:03:41,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 218 transitions, 2440 flow [2024-06-27 20:03:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:03:41,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 20:03:41,369 INFO L175 Difference]: Start difference. First operand has 172 places, 204 transitions, 1973 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:03:41,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 218 transitions, 2440 flow [2024-06-27 20:03:41,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 218 transitions, 2332 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:41,546 INFO L231 Difference]: Finished difference. Result has 175 places, 208 transitions, 1972 flow [2024-06-27 20:03:41,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1972, PETRI_PLACES=175, PETRI_TRANSITIONS=208} [2024-06-27 20:03:41,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 20:03:41,546 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 208 transitions, 1972 flow [2024-06-27 20:03:41,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:41,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:41,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:41,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:03:41,547 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:41,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1001474596, now seen corresponding path program 4 times [2024-06-27 20:03:41,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:41,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157162091] [2024-06-27 20:03:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:42,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:42,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157162091] [2024-06-27 20:03:42,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157162091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:42,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:42,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:42,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729450528] [2024-06-27 20:03:42,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:42,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:42,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:42,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:42,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 208 transitions, 1972 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:42,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:42,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:42,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:43,021 INFO L124 PetriNetUnfolderBase]: 1930/3196 cut-off events. [2024-06-27 20:03:43,021 INFO L125 PetriNetUnfolderBase]: For 156441/156463 co-relation queries the response was YES. [2024-06-27 20:03:43,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23297 conditions, 3196 events. 1930/3196 cut-off events. For 156441/156463 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18602 event pairs, 484 based on Foata normal form. 12/3178 useless extension candidates. Maximal degree in co-relation 23219. Up to 2845 conditions per place. [2024-06-27 20:03:43,050 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 145 selfloop transitions, 54 changer transitions 0/224 dead transitions. [2024-06-27 20:03:43,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 224 transitions, 2472 flow [2024-06-27 20:03:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:03:43,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:03:43,051 INFO L175 Difference]: Start difference. First operand has 175 places, 208 transitions, 1972 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:03:43,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 224 transitions, 2472 flow [2024-06-27 20:03:43,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 224 transitions, 2384 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:43,205 INFO L231 Difference]: Finished difference. Result has 179 places, 214 transitions, 2104 flow [2024-06-27 20:03:43,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2104, PETRI_PLACES=179, PETRI_TRANSITIONS=214} [2024-06-27 20:03:43,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-27 20:03:43,206 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 214 transitions, 2104 flow [2024-06-27 20:03:43,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:43,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:43,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:43,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:03:43,206 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:43,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1582397099, now seen corresponding path program 1 times [2024-06-27 20:03:43,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:43,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456366063] [2024-06-27 20:03:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:43,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:44,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456366063] [2024-06-27 20:03:44,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456366063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:44,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:44,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:44,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306191882] [2024-06-27 20:03:44,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:44,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:44,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:44,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:44,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:44,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:44,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 214 transitions, 2104 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:44,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:44,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:44,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:44,797 INFO L124 PetriNetUnfolderBase]: 1980/3296 cut-off events. [2024-06-27 20:03:44,797 INFO L125 PetriNetUnfolderBase]: For 163770/163783 co-relation queries the response was YES. [2024-06-27 20:03:44,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24293 conditions, 3296 events. 1980/3296 cut-off events. For 163770/163783 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19311 event pairs, 486 based on Foata normal form. 7/3294 useless extension candidates. Maximal degree in co-relation 24213. Up to 3007 conditions per place. [2024-06-27 20:03:44,826 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 17 changer transitions 0/233 dead transitions. [2024-06-27 20:03:44,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 233 transitions, 2658 flow [2024-06-27 20:03:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:03:44,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 20:03:44,827 INFO L175 Difference]: Start difference. First operand has 179 places, 214 transitions, 2104 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:03:44,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 233 transitions, 2658 flow [2024-06-27 20:03:44,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 233 transitions, 2561 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:44,972 INFO L231 Difference]: Finished difference. Result has 183 places, 217 transitions, 2115 flow [2024-06-27 20:03:44,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2115, PETRI_PLACES=183, PETRI_TRANSITIONS=217} [2024-06-27 20:03:44,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 20:03:44,972 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 217 transitions, 2115 flow [2024-06-27 20:03:44,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:44,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:44,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:44,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:03:44,973 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:44,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash -170239787, now seen corresponding path program 2 times [2024-06-27 20:03:44,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:44,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683721866] [2024-06-27 20:03:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:44,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:46,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683721866] [2024-06-27 20:03:46,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683721866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:46,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:46,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:46,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197334458] [2024-06-27 20:03:46,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:46,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:46,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:46,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:46,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 217 transitions, 2115 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:46,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:46,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:46,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:46,793 INFO L124 PetriNetUnfolderBase]: 1985/3307 cut-off events. [2024-06-27 20:03:46,793 INFO L125 PetriNetUnfolderBase]: For 170366/170379 co-relation queries the response was YES. [2024-06-27 20:03:46,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24745 conditions, 3307 events. 1985/3307 cut-off events. For 170366/170379 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19386 event pairs, 484 based on Foata normal form. 12/3309 useless extension candidates. Maximal degree in co-relation 24663. Up to 3014 conditions per place. [2024-06-27 20:03:46,823 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2024-06-27 20:03:46,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 235 transitions, 2690 flow [2024-06-27 20:03:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:03:46,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:03:46,824 INFO L175 Difference]: Start difference. First operand has 183 places, 217 transitions, 2115 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:03:46,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 235 transitions, 2690 flow [2024-06-27 20:03:47,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 235 transitions, 2604 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:47,037 INFO L231 Difference]: Finished difference. Result has 186 places, 221 transitions, 2159 flow [2024-06-27 20:03:47,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2159, PETRI_PLACES=186, PETRI_TRANSITIONS=221} [2024-06-27 20:03:47,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 20:03:47,038 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 221 transitions, 2159 flow [2024-06-27 20:03:47,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:47,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:47,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:47,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:03:47,039 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:47,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:47,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1508958993, now seen corresponding path program 3 times [2024-06-27 20:03:47,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:47,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931513158] [2024-06-27 20:03:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:47,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:47,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:47,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931513158] [2024-06-27 20:03:47,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931513158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:47,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:47,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:47,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682922642] [2024-06-27 20:03:47,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:47,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:47,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:47,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:48,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:48,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 221 transitions, 2159 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:48,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:48,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:48,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:48,572 INFO L124 PetriNetUnfolderBase]: 2013/3354 cut-off events. [2024-06-27 20:03:48,572 INFO L125 PetriNetUnfolderBase]: For 184974/184984 co-relation queries the response was YES. [2024-06-27 20:03:48,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25668 conditions, 3354 events. 2013/3354 cut-off events. For 184974/184984 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19822 event pairs, 486 based on Foata normal form. 9/3353 useless extension candidates. Maximal degree in co-relation 25584. Up to 2982 conditions per place. [2024-06-27 20:03:48,660 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 47 changer transitions 0/246 dead transitions. [2024-06-27 20:03:48,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 246 transitions, 3115 flow [2024-06-27 20:03:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:03:48,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 20:03:48,661 INFO L175 Difference]: Start difference. First operand has 186 places, 221 transitions, 2159 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:03:48,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 246 transitions, 3115 flow [2024-06-27 20:03:48,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 246 transitions, 3024 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:48,939 INFO L231 Difference]: Finished difference. Result has 190 places, 232 transitions, 2428 flow [2024-06-27 20:03:48,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2428, PETRI_PLACES=190, PETRI_TRANSITIONS=232} [2024-06-27 20:03:48,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-27 20:03:48,940 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 232 transitions, 2428 flow [2024-06-27 20:03:48,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:48,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:48,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:48,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:03:48,940 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:48,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash 994307241, now seen corresponding path program 4 times [2024-06-27 20:03:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:48,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106567261] [2024-06-27 20:03:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:49,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:49,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106567261] [2024-06-27 20:03:49,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106567261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:49,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:49,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:49,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121369545] [2024-06-27 20:03:49,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:49,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:49,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:49,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:49,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:49,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 232 transitions, 2428 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:49,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:49,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:49,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:50,631 INFO L124 PetriNetUnfolderBase]: 2022/3368 cut-off events. [2024-06-27 20:03:50,631 INFO L125 PetriNetUnfolderBase]: For 193560/193570 co-relation queries the response was YES. [2024-06-27 20:03:50,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26453 conditions, 3368 events. 2022/3368 cut-off events. For 193560/193570 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19881 event pairs, 485 based on Foata normal form. 9/3368 useless extension candidates. Maximal degree in co-relation 26367. Up to 3044 conditions per place. [2024-06-27 20:03:50,664 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 30 changer transitions 0/252 dead transitions. [2024-06-27 20:03:50,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 252 transitions, 3236 flow [2024-06-27 20:03:50,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:03:50,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:03:50,666 INFO L175 Difference]: Start difference. First operand has 190 places, 232 transitions, 2428 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:03:50,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 252 transitions, 3236 flow [2024-06-27 20:03:50,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 252 transitions, 3110 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 20:03:50,967 INFO L231 Difference]: Finished difference. Result has 195 places, 239 transitions, 2546 flow [2024-06-27 20:03:50,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2546, PETRI_PLACES=195, PETRI_TRANSITIONS=239} [2024-06-27 20:03:50,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-27 20:03:50,967 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 239 transitions, 2546 flow [2024-06-27 20:03:50,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:50,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:50,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:50,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:03:50,968 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:50,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1001935938, now seen corresponding path program 1 times [2024-06-27 20:03:50,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:50,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524708072] [2024-06-27 20:03:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:52,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:52,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524708072] [2024-06-27 20:03:52,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524708072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:52,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:52,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533774312] [2024-06-27 20:03:52,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:52,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:03:52,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 239 transitions, 2546 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:52,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:52,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:03:52,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:52,845 INFO L124 PetriNetUnfolderBase]: 1973/3284 cut-off events. [2024-06-27 20:03:52,846 INFO L125 PetriNetUnfolderBase]: For 194968/194996 co-relation queries the response was YES. [2024-06-27 20:03:52,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26099 conditions, 3284 events. 1973/3284 cut-off events. For 194968/194996 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19254 event pairs, 488 based on Foata normal form. 15/3275 useless extension candidates. Maximal degree in co-relation 26011. Up to 2973 conditions per place. [2024-06-27 20:03:52,876 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 209 selfloop transitions, 19 changer transitions 0/253 dead transitions. [2024-06-27 20:03:52,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 253 transitions, 3090 flow [2024-06-27 20:03:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:03:52,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 20:03:52,877 INFO L175 Difference]: Start difference. First operand has 195 places, 239 transitions, 2546 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:03:52,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 253 transitions, 3090 flow [2024-06-27 20:03:53,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 253 transitions, 2998 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:53,113 INFO L231 Difference]: Finished difference. Result has 200 places, 241 transitions, 2559 flow [2024-06-27 20:03:53,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2559, PETRI_PLACES=200, PETRI_TRANSITIONS=241} [2024-06-27 20:03:53,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-27 20:03:53,114 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 241 transitions, 2559 flow [2024-06-27 20:03:53,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:53,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:53,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:53,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:03:53,115 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:53,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1375630522, now seen corresponding path program 1 times [2024-06-27 20:03:53,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:53,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425104515] [2024-06-27 20:03:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:53,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:53,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:53,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425104515] [2024-06-27 20:03:53,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425104515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:53,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:53,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:53,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189787417] [2024-06-27 20:03:53,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:53,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:53,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:53,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 241 transitions, 2559 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:53,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:53,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:53,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:54,470 INFO L124 PetriNetUnfolderBase]: 2153/3514 cut-off events. [2024-06-27 20:03:54,471 INFO L125 PetriNetUnfolderBase]: For 203161/203165 co-relation queries the response was YES. [2024-06-27 20:03:54,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27559 conditions, 3514 events. 2153/3514 cut-off events. For 203161/203165 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20236 event pairs, 507 based on Foata normal form. 6/3519 useless extension candidates. Maximal degree in co-relation 27469. Up to 3233 conditions per place. [2024-06-27 20:03:54,503 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 29 changer transitions 0/271 dead transitions. [2024-06-27 20:03:54,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 271 transitions, 3276 flow [2024-06-27 20:03:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:03:54,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:03:54,504 INFO L175 Difference]: Start difference. First operand has 200 places, 241 transitions, 2559 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:03:54,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 271 transitions, 3276 flow [2024-06-27 20:03:54,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 271 transitions, 3161 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:54,842 INFO L231 Difference]: Finished difference. Result has 201 places, 245 transitions, 2611 flow [2024-06-27 20:03:54,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2611, PETRI_PLACES=201, PETRI_TRANSITIONS=245} [2024-06-27 20:03:54,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 20:03:54,842 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 245 transitions, 2611 flow [2024-06-27 20:03:54,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:54,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:54,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:54,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:03:54,843 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:54,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1369916602, now seen corresponding path program 2 times [2024-06-27 20:03:54,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:54,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969732485] [2024-06-27 20:03:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:54,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:55,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:55,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969732485] [2024-06-27 20:03:55,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969732485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:55,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:55,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:55,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781901665] [2024-06-27 20:03:55,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:55,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:55,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:55,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:55,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:55,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 245 transitions, 2611 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:55,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:56,304 INFO L124 PetriNetUnfolderBase]: 2168/3539 cut-off events. [2024-06-27 20:03:56,305 INFO L125 PetriNetUnfolderBase]: For 213358/213362 co-relation queries the response was YES. [2024-06-27 20:03:56,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28247 conditions, 3539 events. 2168/3539 cut-off events. For 213358/213362 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20466 event pairs, 543 based on Foata normal form. 6/3544 useless extension candidates. Maximal degree in co-relation 28156. Up to 3241 conditions per place. [2024-06-27 20:03:56,339 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 35 changer transitions 0/279 dead transitions. [2024-06-27 20:03:56,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 279 transitions, 3384 flow [2024-06-27 20:03:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:56,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:03:56,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:03:56,340 INFO L175 Difference]: Start difference. First operand has 201 places, 245 transitions, 2611 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:03:56,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 279 transitions, 3384 flow [2024-06-27 20:03:56,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 279 transitions, 3271 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:56,651 INFO L231 Difference]: Finished difference. Result has 206 places, 251 transitions, 2705 flow [2024-06-27 20:03:56,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2705, PETRI_PLACES=206, PETRI_TRANSITIONS=251} [2024-06-27 20:03:56,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 20:03:56,652 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 251 transitions, 2705 flow [2024-06-27 20:03:56,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:56,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:56,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:56,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:03:56,653 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:56,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1378490458, now seen corresponding path program 1 times [2024-06-27 20:03:56,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:56,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018379435] [2024-06-27 20:03:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:56,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:57,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:57,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018379435] [2024-06-27 20:03:57,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018379435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:57,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:57,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:57,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456191444] [2024-06-27 20:03:57,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:57,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:57,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:57,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:57,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:57,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 251 transitions, 2705 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:57,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:57,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:57,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:58,095 INFO L124 PetriNetUnfolderBase]: 2176/3551 cut-off events. [2024-06-27 20:03:58,095 INFO L125 PetriNetUnfolderBase]: For 224487/224491 co-relation queries the response was YES. [2024-06-27 20:03:58,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28837 conditions, 3551 events. 2176/3551 cut-off events. For 224487/224491 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20454 event pairs, 414 based on Foata normal form. 6/3556 useless extension candidates. Maximal degree in co-relation 28744. Up to 3247 conditions per place. [2024-06-27 20:03:58,130 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 250 selfloop transitions, 25 changer transitions 0/280 dead transitions. [2024-06-27 20:03:58,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 280 transitions, 3396 flow [2024-06-27 20:03:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:03:58,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:03:58,132 INFO L175 Difference]: Start difference. First operand has 206 places, 251 transitions, 2705 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:03:58,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 280 transitions, 3396 flow [2024-06-27 20:03:58,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 280 transitions, 3265 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:58,451 INFO L231 Difference]: Finished difference. Result has 208 places, 253 transitions, 2687 flow [2024-06-27 20:03:58,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2687, PETRI_PLACES=208, PETRI_TRANSITIONS=253} [2024-06-27 20:03:58,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-27 20:03:58,455 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 253 transitions, 2687 flow [2024-06-27 20:03:58,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:58,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:58,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:58,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:03:58,456 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:58,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1369919578, now seen corresponding path program 2 times [2024-06-27 20:03:58,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:58,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625827754] [2024-06-27 20:03:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:58,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:59,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:59,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625827754] [2024-06-27 20:03:59,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625827754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:59,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:59,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:59,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57119559] [2024-06-27 20:03:59,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:59,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:59,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:59,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:03:59,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 253 transitions, 2687 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:59,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:59,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:03:59,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:59,913 INFO L124 PetriNetUnfolderBase]: 2184/3563 cut-off events. [2024-06-27 20:03:59,913 INFO L125 PetriNetUnfolderBase]: For 231145/231149 co-relation queries the response was YES. [2024-06-27 20:03:59,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29087 conditions, 3563 events. 2184/3563 cut-off events. For 231145/231149 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20581 event pairs, 505 based on Foata normal form. 6/3568 useless extension candidates. Maximal degree in co-relation 28993. Up to 3296 conditions per place. [2024-06-27 20:03:59,948 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 26 changer transitions 0/278 dead transitions. [2024-06-27 20:03:59,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 278 transitions, 3366 flow [2024-06-27 20:03:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:03:59,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:03:59,950 INFO L175 Difference]: Start difference. First operand has 208 places, 253 transitions, 2687 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:03:59,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 278 transitions, 3366 flow [2024-06-27 20:04:00,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 278 transitions, 3269 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:00,292 INFO L231 Difference]: Finished difference. Result has 210 places, 255 transitions, 2709 flow [2024-06-27 20:04:00,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2709, PETRI_PLACES=210, PETRI_TRANSITIONS=255} [2024-06-27 20:04:00,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-27 20:04:00,293 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 255 transitions, 2709 flow [2024-06-27 20:04:00,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:00,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:00,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:00,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:04:00,294 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:00,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:00,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1609636794, now seen corresponding path program 3 times [2024-06-27 20:04:00,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:00,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120922528] [2024-06-27 20:04:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:00,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:00,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:00,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120922528] [2024-06-27 20:04:00,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120922528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:00,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:00,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718003030] [2024-06-27 20:04:00,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:00,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:00,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:00,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 255 transitions, 2709 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:00,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:00,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:00,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:01,666 INFO L124 PetriNetUnfolderBase]: 2194/3580 cut-off events. [2024-06-27 20:04:01,666 INFO L125 PetriNetUnfolderBase]: For 240020/240026 co-relation queries the response was YES. [2024-06-27 20:04:01,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29422 conditions, 3580 events. 2194/3580 cut-off events. For 240020/240026 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20747 event pairs, 513 based on Foata normal form. 5/3584 useless extension candidates. Maximal degree in co-relation 29327. Up to 3244 conditions per place. [2024-06-27 20:04:01,699 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2024-06-27 20:04:01,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 280 transitions, 3431 flow [2024-06-27 20:04:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:04:01,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:04:01,700 INFO L175 Difference]: Start difference. First operand has 210 places, 255 transitions, 2709 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:04:01,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 280 transitions, 3431 flow [2024-06-27 20:04:02,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 280 transitions, 3323 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:02,019 INFO L231 Difference]: Finished difference. Result has 212 places, 258 transitions, 2787 flow [2024-06-27 20:04:02,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2601, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2787, PETRI_PLACES=212, PETRI_TRANSITIONS=258} [2024-06-27 20:04:02,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 20:04:02,020 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 258 transitions, 2787 flow [2024-06-27 20:04:02,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:02,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:02,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:02,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:04:02,021 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:02,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1496263954, now seen corresponding path program 1 times [2024-06-27 20:04:02,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:02,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342785930] [2024-06-27 20:04:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:02,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:02,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:02,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342785930] [2024-06-27 20:04:02,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342785930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:02,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:02,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:02,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756518296] [2024-06-27 20:04:02,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:02,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:02,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:02,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:02,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 258 transitions, 2787 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:02,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:02,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:03,499 INFO L124 PetriNetUnfolderBase]: 2199/3588 cut-off events. [2024-06-27 20:04:03,499 INFO L125 PetriNetUnfolderBase]: For 249738/249742 co-relation queries the response was YES. [2024-06-27 20:04:03,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29989 conditions, 3588 events. 2199/3588 cut-off events. For 249738/249742 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20813 event pairs, 512 based on Foata normal form. 5/3591 useless extension candidates. Maximal degree in co-relation 29893. Up to 3290 conditions per place. [2024-06-27 20:04:03,538 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 32 changer transitions 0/284 dead transitions. [2024-06-27 20:04:03,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 284 transitions, 3510 flow [2024-06-27 20:04:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:04:03,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:04:03,539 INFO L175 Difference]: Start difference. First operand has 212 places, 258 transitions, 2787 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:04:03,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 284 transitions, 3510 flow [2024-06-27 20:04:03,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 284 transitions, 3345 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:03,936 INFO L231 Difference]: Finished difference. Result has 213 places, 261 transitions, 2786 flow [2024-06-27 20:04:03,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2786, PETRI_PLACES=213, PETRI_TRANSITIONS=261} [2024-06-27 20:04:03,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 20:04:03,937 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 261 transitions, 2786 flow [2024-06-27 20:04:03,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:03,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:03,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:03,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:04:03,937 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:03,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1609935696, now seen corresponding path program 1 times [2024-06-27 20:04:03,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:03,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792205087] [2024-06-27 20:04:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:03,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:04,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:04,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792205087] [2024-06-27 20:04:04,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792205087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:04,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:04,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:04,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21245060] [2024-06-27 20:04:04,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:04,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:04,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:04,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:04,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 261 transitions, 2786 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:04,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:04,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:04,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:05,454 INFO L124 PetriNetUnfolderBase]: 2209/3603 cut-off events. [2024-06-27 20:04:05,454 INFO L125 PetriNetUnfolderBase]: For 260864/260870 co-relation queries the response was YES. [2024-06-27 20:04:05,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30346 conditions, 3603 events. 2209/3603 cut-off events. For 260864/260870 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20897 event pairs, 543 based on Foata normal form. 8/3610 useless extension candidates. Maximal degree in co-relation 30251. Up to 3331 conditions per place. [2024-06-27 20:04:05,488 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 26 changer transitions 0/286 dead transitions. [2024-06-27 20:04:05,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 286 transitions, 3515 flow [2024-06-27 20:04:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:04:05,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 20:04:05,489 INFO L175 Difference]: Start difference. First operand has 213 places, 261 transitions, 2786 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:04:05,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 286 transitions, 3515 flow [2024-06-27 20:04:05,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 286 transitions, 3373 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:05,914 INFO L231 Difference]: Finished difference. Result has 215 places, 265 transitions, 2795 flow [2024-06-27 20:04:05,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2795, PETRI_PLACES=215, PETRI_TRANSITIONS=265} [2024-06-27 20:04:05,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-27 20:04:05,915 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 265 transitions, 2795 flow [2024-06-27 20:04:05,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:05,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:05,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:05,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:04:05,915 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:05,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1190359962, now seen corresponding path program 4 times [2024-06-27 20:04:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:05,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240461473] [2024-06-27 20:04:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240461473] [2024-06-27 20:04:06,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240461473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:06,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:06,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:06,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240413045] [2024-06-27 20:04:06,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:06,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:06,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:06,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:06,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:06,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 265 transitions, 2795 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:06,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:06,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:06,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:07,295 INFO L124 PetriNetUnfolderBase]: 2219/3619 cut-off events. [2024-06-27 20:04:07,296 INFO L125 PetriNetUnfolderBase]: For 267531/267537 co-relation queries the response was YES. [2024-06-27 20:04:07,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31065 conditions, 3619 events. 2219/3619 cut-off events. For 267531/267537 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20922 event pairs, 547 based on Foata normal form. 5/3623 useless extension candidates. Maximal degree in co-relation 30969. Up to 3257 conditions per place. [2024-06-27 20:04:07,334 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 48 changer transitions 0/288 dead transitions. [2024-06-27 20:04:07,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 288 transitions, 3555 flow [2024-06-27 20:04:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:04:07,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:04:07,336 INFO L175 Difference]: Start difference. First operand has 215 places, 265 transitions, 2795 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:04:07,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 288 transitions, 3555 flow [2024-06-27 20:04:07,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 288 transitions, 3432 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:07,805 INFO L231 Difference]: Finished difference. Result has 217 places, 268 transitions, 2886 flow [2024-06-27 20:04:07,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2886, PETRI_PLACES=217, PETRI_TRANSITIONS=268} [2024-06-27 20:04:07,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 20:04:07,805 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 268 transitions, 2886 flow [2024-06-27 20:04:07,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:07,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:07,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:07,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:04:07,806 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:07,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1787067216, now seen corresponding path program 2 times [2024-06-27 20:04:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:07,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111129108] [2024-06-27 20:04:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:07,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:08,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:08,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111129108] [2024-06-27 20:04:08,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111129108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:08,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:08,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:08,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238247644] [2024-06-27 20:04:08,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:08,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:08,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:08,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:08,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:08,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 268 transitions, 2886 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:08,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:08,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:08,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:09,374 INFO L124 PetriNetUnfolderBase]: 2229/3635 cut-off events. [2024-06-27 20:04:09,374 INFO L125 PetriNetUnfolderBase]: For 280207/280213 co-relation queries the response was YES. [2024-06-27 20:04:09,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31720 conditions, 3635 events. 2229/3635 cut-off events. For 280207/280213 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21002 event pairs, 507 based on Foata normal form. 8/3642 useless extension candidates. Maximal degree in co-relation 31623. Up to 3342 conditions per place. [2024-06-27 20:04:09,413 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 33 changer transitions 0/291 dead transitions. [2024-06-27 20:04:09,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 291 transitions, 3645 flow [2024-06-27 20:04:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:04:09,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:04:09,414 INFO L175 Difference]: Start difference. First operand has 217 places, 268 transitions, 2886 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:04:09,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 291 transitions, 3645 flow [2024-06-27 20:04:09,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 291 transitions, 3461 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:09,834 INFO L231 Difference]: Finished difference. Result has 219 places, 272 transitions, 2877 flow [2024-06-27 20:04:09,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2877, PETRI_PLACES=219, PETRI_TRANSITIONS=272} [2024-06-27 20:04:09,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-27 20:04:09,834 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 272 transitions, 2877 flow [2024-06-27 20:04:09,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:09,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:09,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:09,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:04:09,835 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:09,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:09,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1082909302, now seen corresponding path program 5 times [2024-06-27 20:04:09,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:09,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296646077] [2024-06-27 20:04:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:09,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:10,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:10,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296646077] [2024-06-27 20:04:10,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296646077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:10,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:10,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:10,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590752111] [2024-06-27 20:04:10,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:10,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:10,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:10,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:10,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:10,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:10,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 272 transitions, 2877 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:10,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:10,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:10,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:11,272 INFO L124 PetriNetUnfolderBase]: 2271/3700 cut-off events. [2024-06-27 20:04:11,272 INFO L125 PetriNetUnfolderBase]: For 300601/300607 co-relation queries the response was YES. [2024-06-27 20:04:11,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33237 conditions, 3700 events. 2271/3700 cut-off events. For 300601/300607 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21472 event pairs, 554 based on Foata normal form. 5/3704 useless extension candidates. Maximal degree in co-relation 33139. Up to 3266 conditions per place. [2024-06-27 20:04:11,311 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 67 changer transitions 0/301 dead transitions. [2024-06-27 20:04:11,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 301 transitions, 4153 flow [2024-06-27 20:04:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:04:11,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:04:11,312 INFO L175 Difference]: Start difference. First operand has 219 places, 272 transitions, 2877 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:04:11,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 301 transitions, 4153 flow [2024-06-27 20:04:11,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 301 transitions, 4006 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:11,722 INFO L231 Difference]: Finished difference. Result has 221 places, 281 transitions, 3218 flow [2024-06-27 20:04:11,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3218, PETRI_PLACES=221, PETRI_TRANSITIONS=281} [2024-06-27 20:04:11,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-27 20:04:11,723 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 281 transitions, 3218 flow [2024-06-27 20:04:11,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:11,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:11,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:11,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:04:11,723 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 20:04:11,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -917301416, now seen corresponding path program 3 times [2024-06-27 20:04:11,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:11,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673233479] [2024-06-27 20:04:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:11,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:12,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:12,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673233479] [2024-06-27 20:04:12,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673233479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:12,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:12,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:12,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6958723] [2024-06-27 20:04:12,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:12,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:12,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:12,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 281 transitions, 3218 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:12,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:12,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:12,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:13,237 INFO L124 PetriNetUnfolderBase]: 2292/3730 cut-off events. [2024-06-27 20:04:13,238 INFO L125 PetriNetUnfolderBase]: For 317010/317016 co-relation queries the response was YES. [2024-06-27 20:04:13,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34193 conditions, 3730 events. 2292/3730 cut-off events. For 317010/317016 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21664 event pairs, 509 based on Foata normal form. 7/3736 useless extension candidates. Maximal degree in co-relation 34094. Up to 3409 conditions per place. [2024-06-27 20:04:13,276 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 45 changer transitions 0/309 dead transitions. [2024-06-27 20:04:13,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 309 transitions, 4198 flow [2024-06-27 20:04:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:04:13,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 20:04:13,277 INFO L175 Difference]: Start difference. First operand has 221 places, 281 transitions, 3218 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:04:13,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 309 transitions, 4198 flow [2024-06-27 20:04:13,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 309 transitions, 4048 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:13,773 INFO L231 Difference]: Finished difference. Result has 227 places, 290 transitions, 3369 flow [2024-06-27 20:04:13,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3369, PETRI_PLACES=227, PETRI_TRANSITIONS=290} [2024-06-27 20:04:13,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-27 20:04:13,774 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 290 transitions, 3369 flow [2024-06-27 20:04:13,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:13,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:13,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:13,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:04:13,775 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:13,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1786946874, now seen corresponding path program 6 times [2024-06-27 20:04:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:13,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919637932] [2024-06-27 20:04:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:14,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:14,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919637932] [2024-06-27 20:04:14,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919637932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:14,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:14,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926783679] [2024-06-27 20:04:14,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:14,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:14,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:14,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:14,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 290 transitions, 3369 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:14,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:14,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:14,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:15,357 INFO L124 PetriNetUnfolderBase]: 2286/3719 cut-off events. [2024-06-27 20:04:15,357 INFO L125 PetriNetUnfolderBase]: For 327650/327654 co-relation queries the response was YES. [2024-06-27 20:04:15,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34727 conditions, 3719 events. 2286/3719 cut-off events. For 327650/327654 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21552 event pairs, 548 based on Foata normal form. 3/3721 useless extension candidates. Maximal degree in co-relation 34625. Up to 3430 conditions per place. [2024-06-27 20:04:15,398 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 270 selfloop transitions, 31 changer transitions 0/306 dead transitions. [2024-06-27 20:04:15,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 306 transitions, 4037 flow [2024-06-27 20:04:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:04:15,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:04:15,400 INFO L175 Difference]: Start difference. First operand has 227 places, 290 transitions, 3369 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:04:15,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 306 transitions, 4037 flow [2024-06-27 20:04:15,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 306 transitions, 3852 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:15,959 INFO L231 Difference]: Finished difference. Result has 231 places, 290 transitions, 3252 flow [2024-06-27 20:04:15,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3252, PETRI_PLACES=231, PETRI_TRANSITIONS=290} [2024-06-27 20:04:15,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-27 20:04:15,960 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 290 transitions, 3252 flow [2024-06-27 20:04:15,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:15,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:15,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:15,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:04:15,960 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:15,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1786943898, now seen corresponding path program 3 times [2024-06-27 20:04:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:15,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913921332] [2024-06-27 20:04:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:15,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:16,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:16,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913921332] [2024-06-27 20:04:16,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913921332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:16,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:16,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:16,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304034821] [2024-06-27 20:04:16,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:16,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:16,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:16,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:16,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:16,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 290 transitions, 3252 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:16,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:16,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:16,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:17,496 INFO L124 PetriNetUnfolderBase]: 2294/3731 cut-off events. [2024-06-27 20:04:17,496 INFO L125 PetriNetUnfolderBase]: For 335584/335588 co-relation queries the response was YES. [2024-06-27 20:04:17,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34886 conditions, 3731 events. 2294/3731 cut-off events. For 335584/335588 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21662 event pairs, 548 based on Foata normal form. 3/3733 useless extension candidates. Maximal degree in co-relation 34782. Up to 3442 conditions per place. [2024-06-27 20:04:17,539 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 273 selfloop transitions, 30 changer transitions 0/308 dead transitions. [2024-06-27 20:04:17,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 308 transitions, 3972 flow [2024-06-27 20:04:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:04:17,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:04:17,540 INFO L175 Difference]: Start difference. First operand has 231 places, 290 transitions, 3252 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:04:17,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 308 transitions, 3972 flow [2024-06-27 20:04:18,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 308 transitions, 3856 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:04:18,042 INFO L231 Difference]: Finished difference. Result has 231 places, 292 transitions, 3275 flow [2024-06-27 20:04:18,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3136, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3275, PETRI_PLACES=231, PETRI_TRANSITIONS=292} [2024-06-27 20:04:18,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-27 20:04:18,043 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 292 transitions, 3275 flow [2024-06-27 20:04:18,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:18,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:18,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:18,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:04:18,044 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:18,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:18,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1082662852, now seen corresponding path program 1 times [2024-06-27 20:04:18,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:18,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565211359] [2024-06-27 20:04:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:18,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565211359] [2024-06-27 20:04:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565211359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:19,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:19,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784402121] [2024-06-27 20:04:19,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:19,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:19,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:19,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:04:19,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 292 transitions, 3275 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:19,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:19,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:04:19,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:20,122 INFO L124 PetriNetUnfolderBase]: 2140/3533 cut-off events. [2024-06-27 20:04:20,122 INFO L125 PetriNetUnfolderBase]: For 342390/342420 co-relation queries the response was YES. [2024-06-27 20:04:20,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33934 conditions, 3533 events. 2140/3533 cut-off events. For 342390/342420 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20894 event pairs, 513 based on Foata normal form. 17/3518 useless extension candidates. Maximal degree in co-relation 33831. Up to 3118 conditions per place. [2024-06-27 20:04:20,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 243 selfloop transitions, 38 changer transitions 0/311 dead transitions. [2024-06-27 20:04:20,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 311 transitions, 3963 flow [2024-06-27 20:04:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:04:20,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 20:04:20,164 INFO L175 Difference]: Start difference. First operand has 231 places, 292 transitions, 3275 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:04:20,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 311 transitions, 3963 flow [2024-06-27 20:04:20,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 311 transitions, 3840 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:20,580 INFO L231 Difference]: Finished difference. Result has 234 places, 295 transitions, 3322 flow [2024-06-27 20:04:20,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3322, PETRI_PLACES=234, PETRI_TRANSITIONS=295} [2024-06-27 20:04:20,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-27 20:04:20,581 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 295 transitions, 3322 flow [2024-06-27 20:04:20,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:20,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:20,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:20,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:04:20,581 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:20,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1687406720, now seen corresponding path program 2 times [2024-06-27 20:04:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:20,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654753384] [2024-06-27 20:04:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:20,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:21,333 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 20:04:21,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654753384] [2024-06-27 20:04:21,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654753384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:21,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:21,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:21,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666281583] [2024-06-27 20:04:21,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:21,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:21,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:21,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:21,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:21,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 295 transitions, 3322 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:21,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:21,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:21,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:22,251 INFO L124 PetriNetUnfolderBase]: 2309/3757 cut-off events. [2024-06-27 20:04:22,251 INFO L125 PetriNetUnfolderBase]: For 352327/352333 co-relation queries the response was YES. [2024-06-27 20:04:22,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35690 conditions, 3757 events. 2309/3757 cut-off events. For 352327/352333 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21828 event pairs, 548 based on Foata normal form. 7/3763 useless extension candidates. Maximal degree in co-relation 35586. Up to 3444 conditions per place. [2024-06-27 20:04:22,296 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 36 changer transitions 0/321 dead transitions. [2024-06-27 20:04:22,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 321 transitions, 4164 flow [2024-06-27 20:04:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:04:22,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:04:22,297 INFO L175 Difference]: Start difference. First operand has 234 places, 295 transitions, 3322 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:04:22,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 321 transitions, 4164 flow [2024-06-27 20:04:22,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 321 transitions, 4014 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:22,759 INFO L231 Difference]: Finished difference. Result has 237 places, 300 transitions, 3398 flow [2024-06-27 20:04:22,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3174, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3398, PETRI_PLACES=237, PETRI_TRANSITIONS=300} [2024-06-27 20:04:22,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 20:04:22,759 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 300 transitions, 3398 flow [2024-06-27 20:04:22,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:22,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:22,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:22,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:04:22,760 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:22,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1698834560, now seen corresponding path program 3 times [2024-06-27 20:04:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:22,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264126834] [2024-06-27 20:04:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:23,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:23,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264126834] [2024-06-27 20:04:23,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264126834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:23,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:23,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:23,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800925685] [2024-06-27 20:04:23,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:23,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:23,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:23,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:23,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:23,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:23,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 300 transitions, 3398 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:23,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:23,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:24,344 INFO L124 PetriNetUnfolderBase]: 2314/3765 cut-off events. [2024-06-27 20:04:24,344 INFO L125 PetriNetUnfolderBase]: For 365437/365443 co-relation queries the response was YES. [2024-06-27 20:04:24,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36174 conditions, 3765 events. 2314/3765 cut-off events. For 365437/365443 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21777 event pairs, 548 based on Foata normal form. 7/3771 useless extension candidates. Maximal degree in co-relation 36068. Up to 3438 conditions per place. [2024-06-27 20:04:24,387 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 274 selfloop transitions, 45 changer transitions 0/324 dead transitions. [2024-06-27 20:04:24,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 324 transitions, 4464 flow [2024-06-27 20:04:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:04:24,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:04:24,388 INFO L175 Difference]: Start difference. First operand has 237 places, 300 transitions, 3398 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:04:24,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 324 transitions, 4464 flow [2024-06-27 20:04:24,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 324 transitions, 4298 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:24,879 INFO L231 Difference]: Finished difference. Result has 240 places, 306 transitions, 3578 flow [2024-06-27 20:04:24,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3578, PETRI_PLACES=240, PETRI_TRANSITIONS=306} [2024-06-27 20:04:24,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 20:04:24,879 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 306 transitions, 3578 flow [2024-06-27 20:04:24,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:24,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:24,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:24,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:04:24,880 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:24,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1459326824, now seen corresponding path program 7 times [2024-06-27 20:04:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:24,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801857700] [2024-06-27 20:04:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:25,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801857700] [2024-06-27 20:04:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801857700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:25,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:25,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409506064] [2024-06-27 20:04:25,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:25,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:25,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 306 transitions, 3578 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:25,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:25,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:25,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:26,460 INFO L124 PetriNetUnfolderBase]: 2324/3781 cut-off events. [2024-06-27 20:04:26,460 INFO L125 PetriNetUnfolderBase]: For 382098/382098 co-relation queries the response was YES. [2024-06-27 20:04:26,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36757 conditions, 3781 events. 2324/3781 cut-off events. For 382098/382098 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21948 event pairs, 559 based on Foata normal form. 2/3782 useless extension candidates. Maximal degree in co-relation 36649. Up to 3426 conditions per place. [2024-06-27 20:04:26,497 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 284 selfloop transitions, 40 changer transitions 0/329 dead transitions. [2024-06-27 20:04:26,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 329 transitions, 4418 flow [2024-06-27 20:04:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:04:26,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:04:26,498 INFO L175 Difference]: Start difference. First operand has 240 places, 306 transitions, 3578 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:04:26,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 329 transitions, 4418 flow [2024-06-27 20:04:26,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 329 transitions, 4241 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:26,991 INFO L231 Difference]: Finished difference. Result has 244 places, 309 transitions, 3605 flow [2024-06-27 20:04:26,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3605, PETRI_PLACES=244, PETRI_TRANSITIONS=309} [2024-06-27 20:04:26,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 20:04:26,992 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 309 transitions, 3605 flow [2024-06-27 20:04:26,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:26,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:26,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:26,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:04:26,992 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:26,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1459505570, now seen corresponding path program 4 times [2024-06-27 20:04:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:26,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750752752] [2024-06-27 20:04:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:26,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:27,690 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 20:04:27,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:27,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750752752] [2024-06-27 20:04:27,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750752752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:27,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:27,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:27,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463852260] [2024-06-27 20:04:27,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:27,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:27,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:27,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:27,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:27,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:27,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 309 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:27,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:27,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:27,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:28,629 INFO L124 PetriNetUnfolderBase]: 2321/3779 cut-off events. [2024-06-27 20:04:28,630 INFO L125 PetriNetUnfolderBase]: For 385601/385607 co-relation queries the response was YES. [2024-06-27 20:04:28,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36769 conditions, 3779 events. 2321/3779 cut-off events. For 385601/385607 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21937 event pairs, 550 based on Foata normal form. 7/3785 useless extension candidates. Maximal degree in co-relation 36659. Up to 3461 conditions per place. [2024-06-27 20:04:28,672 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 291 selfloop transitions, 33 changer transitions 0/329 dead transitions. [2024-06-27 20:04:28,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 329 transitions, 4315 flow [2024-06-27 20:04:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:04:28,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 20:04:28,674 INFO L175 Difference]: Start difference. First operand has 244 places, 309 transitions, 3605 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:04:28,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 329 transitions, 4315 flow [2024-06-27 20:04:29,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 329 transitions, 4019 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-27 20:04:29,232 INFO L231 Difference]: Finished difference. Result has 244 places, 309 transitions, 3381 flow [2024-06-27 20:04:29,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3381, PETRI_PLACES=244, PETRI_TRANSITIONS=309} [2024-06-27 20:04:29,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 20:04:29,233 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 309 transitions, 3381 flow [2024-06-27 20:04:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:29,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:29,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:04:29,233 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:29,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1337152190, now seen corresponding path program 8 times [2024-06-27 20:04:29,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:29,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255167581] [2024-06-27 20:04:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:29,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255167581] [2024-06-27 20:04:29,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255167581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:29,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:29,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043377860] [2024-06-27 20:04:29,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:29,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:29,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:29,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:29,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 309 transitions, 3381 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:29,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:29,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:29,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:30,777 INFO L124 PetriNetUnfolderBase]: 2315/3769 cut-off events. [2024-06-27 20:04:30,778 INFO L125 PetriNetUnfolderBase]: For 389199/389199 co-relation queries the response was YES. [2024-06-27 20:04:30,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36345 conditions, 3769 events. 2315/3769 cut-off events. For 389199/389199 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21882 event pairs, 520 based on Foata normal form. 2/3770 useless extension candidates. Maximal degree in co-relation 36234. Up to 3400 conditions per place. [2024-06-27 20:04:30,821 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 45 changer transitions 0/327 dead transitions. [2024-06-27 20:04:30,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 327 transitions, 4119 flow [2024-06-27 20:04:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:04:30,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:04:30,823 INFO L175 Difference]: Start difference. First operand has 244 places, 309 transitions, 3381 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:04:30,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 327 transitions, 4119 flow [2024-06-27 20:04:31,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 327 transitions, 3967 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:31,445 INFO L231 Difference]: Finished difference. Result has 245 places, 309 transitions, 3325 flow [2024-06-27 20:04:31,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3325, PETRI_PLACES=245, PETRI_TRANSITIONS=309} [2024-06-27 20:04:31,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-27 20:04:31,446 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 309 transitions, 3325 flow [2024-06-27 20:04:31,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:31,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:31,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:31,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:04:31,446 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:31,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1459625726, now seen corresponding path program 4 times [2024-06-27 20:04:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461718754] [2024-06-27 20:04:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:31,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461718754] [2024-06-27 20:04:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461718754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:32,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:32,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:32,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970286912] [2024-06-27 20:04:32,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:32,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:32,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:32,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:32,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 309 transitions, 3325 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:32,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:32,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:32,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:33,020 INFO L124 PetriNetUnfolderBase]: 2309/3763 cut-off events. [2024-06-27 20:04:33,020 INFO L125 PetriNetUnfolderBase]: For 392307/392313 co-relation queries the response was YES. [2024-06-27 20:04:33,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36211 conditions, 3763 events. 2309/3763 cut-off events. For 392307/392313 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21818 event pairs, 547 based on Foata normal form. 8/3770 useless extension candidates. Maximal degree in co-relation 36099. Up to 3472 conditions per place. [2024-06-27 20:04:33,062 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 27 changer transitions 0/328 dead transitions. [2024-06-27 20:04:33,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 328 transitions, 4070 flow [2024-06-27 20:04:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:04:33,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:04:33,063 INFO L175 Difference]: Start difference. First operand has 245 places, 309 transitions, 3325 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:04:33,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 328 transitions, 4070 flow [2024-06-27 20:04:33,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 328 transitions, 3842 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:33,573 INFO L231 Difference]: Finished difference. Result has 246 places, 310 transitions, 3183 flow [2024-06-27 20:04:33,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3183, PETRI_PLACES=246, PETRI_TRANSITIONS=310} [2024-06-27 20:04:33,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-27 20:04:33,574 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 310 transitions, 3183 flow [2024-06-27 20:04:33,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:33,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:33,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:33,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:04:33,574 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:33,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:33,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1813888394, now seen corresponding path program 9 times [2024-06-27 20:04:33,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:33,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872329068] [2024-06-27 20:04:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:33,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:34,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:34,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872329068] [2024-06-27 20:04:34,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872329068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:34,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:34,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219676283] [2024-06-27 20:04:34,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:34,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:34,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:34,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 310 transitions, 3183 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:34,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:34,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:35,016 INFO L124 PetriNetUnfolderBase]: 2319/3779 cut-off events. [2024-06-27 20:04:35,016 INFO L125 PetriNetUnfolderBase]: For 401900/401900 co-relation queries the response was YES. [2024-06-27 20:04:35,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36378 conditions, 3779 events. 2319/3779 cut-off events. For 401900/401900 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21971 event pairs, 520 based on Foata normal form. 2/3780 useless extension candidates. Maximal degree in co-relation 36265. Up to 3356 conditions per place. [2024-06-27 20:04:35,059 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 63 changer transitions 0/329 dead transitions. [2024-06-27 20:04:35,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 329 transitions, 4073 flow [2024-06-27 20:04:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:04:35,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:04:35,060 INFO L175 Difference]: Start difference. First operand has 246 places, 310 transitions, 3183 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:04:35,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 329 transitions, 4073 flow [2024-06-27 20:04:35,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 329 transitions, 4004 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:35,674 INFO L231 Difference]: Finished difference. Result has 248 places, 313 transitions, 3386 flow [2024-06-27 20:04:35,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3386, PETRI_PLACES=248, PETRI_TRANSITIONS=313} [2024-06-27 20:04:35,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 20:04:35,675 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 313 transitions, 3386 flow [2024-06-27 20:04:35,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:35,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:35,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:35,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:04:35,675 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:35,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash -982888778, now seen corresponding path program 5 times [2024-06-27 20:04:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:35,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796655697] [2024-06-27 20:04:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:35,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:36,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:36,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796655697] [2024-06-27 20:04:36,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796655697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:36,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:36,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:36,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088767729] [2024-06-27 20:04:36,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:36,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:36,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:36,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:36,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:36,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 313 transitions, 3386 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:36,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:36,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:36,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:37,305 INFO L124 PetriNetUnfolderBase]: 2329/3795 cut-off events. [2024-06-27 20:04:37,305 INFO L125 PetriNetUnfolderBase]: For 418255/418261 co-relation queries the response was YES. [2024-06-27 20:04:37,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37181 conditions, 3795 events. 2329/3795 cut-off events. For 418255/418261 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22138 event pairs, 543 based on Foata normal form. 8/3802 useless extension candidates. Maximal degree in co-relation 37067. Up to 3480 conditions per place. [2024-06-27 20:04:37,422 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 293 selfloop transitions, 35 changer transitions 0/333 dead transitions. [2024-06-27 20:04:37,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 333 transitions, 4256 flow [2024-06-27 20:04:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:04:37,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:04:37,423 INFO L175 Difference]: Start difference. First operand has 248 places, 313 transitions, 3386 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:04:37,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 333 transitions, 4256 flow [2024-06-27 20:04:37,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 333 transitions, 4018 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:37,872 INFO L231 Difference]: Finished difference. Result has 250 places, 317 transitions, 3357 flow [2024-06-27 20:04:37,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3357, PETRI_PLACES=250, PETRI_TRANSITIONS=317} [2024-06-27 20:04:37,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-27 20:04:37,873 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 317 transitions, 3357 flow [2024-06-27 20:04:37,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:37,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:37,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:04:37,873 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 20:04:37,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -982473068, now seen corresponding path program 6 times [2024-06-27 20:04:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:37,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501269041] [2024-06-27 20:04:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:38,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:38,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501269041] [2024-06-27 20:04:38,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501269041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:38,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:38,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467233993] [2024-06-27 20:04:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:38,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:38,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:38,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:38,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 317 transitions, 3357 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:38,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:38,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:38,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:39,506 INFO L124 PetriNetUnfolderBase]: 2339/3811 cut-off events. [2024-06-27 20:04:39,507 INFO L125 PetriNetUnfolderBase]: For 430809/430815 co-relation queries the response was YES. [2024-06-27 20:04:39,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37708 conditions, 3811 events. 2339/3811 cut-off events. For 430809/430815 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22240 event pairs, 507 based on Foata normal form. 8/3818 useless extension candidates. Maximal degree in co-relation 37593. Up to 3470 conditions per place. [2024-06-27 20:04:39,558 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 50 changer transitions 0/340 dead transitions. [2024-06-27 20:04:39,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 340 transitions, 4274 flow [2024-06-27 20:04:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:04:39,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:04:39,560 INFO L175 Difference]: Start difference. First operand has 250 places, 317 transitions, 3357 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:04:39,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 340 transitions, 4274 flow [2024-06-27 20:04:40,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 340 transitions, 4093 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:40,136 INFO L231 Difference]: Finished difference. Result has 253 places, 325 transitions, 3496 flow [2024-06-27 20:04:40,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3496, PETRI_PLACES=253, PETRI_TRANSITIONS=325} [2024-06-27 20:04:40,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 20:04:40,136 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 325 transitions, 3496 flow [2024-06-27 20:04:40,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:40,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:40,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:40,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:04:40,137 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:40,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash 581436352, now seen corresponding path program 7 times [2024-06-27 20:04:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:40,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8969686] [2024-06-27 20:04:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:40,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8969686] [2024-06-27 20:04:40,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8969686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:40,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:40,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636188179] [2024-06-27 20:04:40,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:40,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:40,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:40,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:41,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:41,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 325 transitions, 3496 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:41,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:41,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:41,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:41,826 INFO L124 PetriNetUnfolderBase]: 2360/3841 cut-off events. [2024-06-27 20:04:41,826 INFO L125 PetriNetUnfolderBase]: For 450240/450248 co-relation queries the response was YES. [2024-06-27 20:04:41,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38821 conditions, 3841 events. 2360/3841 cut-off events. For 450240/450248 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22395 event pairs, 509 based on Foata normal form. 9/3849 useless extension candidates. Maximal degree in co-relation 38704. Up to 3468 conditions per place. [2024-06-27 20:04:41,871 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 284 selfloop transitions, 59 changer transitions 0/348 dead transitions. [2024-06-27 20:04:41,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 348 transitions, 4651 flow [2024-06-27 20:04:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:04:41,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:04:41,872 INFO L175 Difference]: Start difference. First operand has 253 places, 325 transitions, 3496 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:04:41,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 348 transitions, 4651 flow [2024-06-27 20:04:42,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 348 transitions, 4484 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:42,532 INFO L231 Difference]: Finished difference. Result has 258 places, 334 transitions, 3714 flow [2024-06-27 20:04:42,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3329, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3714, PETRI_PLACES=258, PETRI_TRANSITIONS=334} [2024-06-27 20:04:42,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-27 20:04:42,533 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 334 transitions, 3714 flow [2024-06-27 20:04:42,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:42,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:42,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:42,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:04:42,533 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:42,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash 581198830, now seen corresponding path program 10 times [2024-06-27 20:04:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813230293] [2024-06-27 20:04:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:43,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:43,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813230293] [2024-06-27 20:04:43,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813230293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:43,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:43,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:43,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208521202] [2024-06-27 20:04:43,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:43,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:43,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:43,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:43,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 334 transitions, 3714 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:43,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:43,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:43,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:44,135 INFO L124 PetriNetUnfolderBase]: 2394/3895 cut-off events. [2024-06-27 20:04:44,136 INFO L125 PetriNetUnfolderBase]: For 485028/485030 co-relation queries the response was YES. [2024-06-27 20:04:44,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40763 conditions, 3895 events. 2394/3895 cut-off events. For 485028/485030 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22790 event pairs, 540 based on Foata normal form. 4/3898 useless extension candidates. Maximal degree in co-relation 40643. Up to 3362 conditions per place. [2024-06-27 20:04:44,179 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 96 changer transitions 0/359 dead transitions. [2024-06-27 20:04:44,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 359 transitions, 5314 flow [2024-06-27 20:04:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:04:44,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:04:44,180 INFO L175 Difference]: Start difference. First operand has 258 places, 334 transitions, 3714 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:04:44,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 359 transitions, 5314 flow [2024-06-27 20:04:44,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 359 transitions, 5150 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:44,995 INFO L231 Difference]: Finished difference. Result has 262 places, 343 transitions, 4192 flow [2024-06-27 20:04:44,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3550, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4192, PETRI_PLACES=262, PETRI_TRANSITIONS=343} [2024-06-27 20:04:44,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-27 20:04:44,995 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 343 transitions, 4192 flow [2024-06-27 20:04:44,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:44,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:44,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:04:44,996 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:44,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 61456126, now seen corresponding path program 8 times [2024-06-27 20:04:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:44,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197679780] [2024-06-27 20:04:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:45,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:45,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197679780] [2024-06-27 20:04:45,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197679780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:45,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:45,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:45,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243306495] [2024-06-27 20:04:45,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:45,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:45,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:45,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:45,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 343 transitions, 4192 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:45,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:45,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:45,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:46,825 INFO L124 PetriNetUnfolderBase]: 2404/3914 cut-off events. [2024-06-27 20:04:46,825 INFO L125 PetriNetUnfolderBase]: For 502372/502380 co-relation queries the response was YES. [2024-06-27 20:04:46,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41613 conditions, 3914 events. 2404/3914 cut-off events. For 502372/502380 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22903 event pairs, 549 based on Foata normal form. 10/3923 useless extension candidates. Maximal degree in co-relation 41491. Up to 3547 conditions per place. [2024-06-27 20:04:46,874 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 305 selfloop transitions, 51 changer transitions 0/361 dead transitions. [2024-06-27 20:04:46,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 361 transitions, 5148 flow [2024-06-27 20:04:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:04:46,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:04:46,875 INFO L175 Difference]: Start difference. First operand has 262 places, 343 transitions, 4192 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:04:46,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 361 transitions, 5148 flow [2024-06-27 20:04:47,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 361 transitions, 4844 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:47,602 INFO L231 Difference]: Finished difference. Result has 266 places, 347 transitions, 4121 flow [2024-06-27 20:04:47,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4121, PETRI_PLACES=266, PETRI_TRANSITIONS=347} [2024-06-27 20:04:47,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-27 20:04:47,603 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 347 transitions, 4121 flow [2024-06-27 20:04:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:47,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:47,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:47,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:04:47,603 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:47,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 466904506, now seen corresponding path program 9 times [2024-06-27 20:04:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:47,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785652708] [2024-06-27 20:04:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:48,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:48,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785652708] [2024-06-27 20:04:48,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785652708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:48,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440734076] [2024-06-27 20:04:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:48,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:48,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:48,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 347 transitions, 4121 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:48,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:48,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:48,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:49,314 INFO L124 PetriNetUnfolderBase]: 2425/3943 cut-off events. [2024-06-27 20:04:49,314 INFO L125 PetriNetUnfolderBase]: For 506195/506203 co-relation queries the response was YES. [2024-06-27 20:04:49,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41655 conditions, 3943 events. 2425/3943 cut-off events. For 506195/506203 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23067 event pairs, 509 based on Foata normal form. 9/3951 useless extension candidates. Maximal degree in co-relation 41532. Up to 3490 conditions per place. [2024-06-27 20:04:49,365 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 103 changer transitions 0/378 dead transitions. [2024-06-27 20:04:49,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 378 transitions, 5623 flow [2024-06-27 20:04:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:04:49,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:04:49,367 INFO L175 Difference]: Start difference. First operand has 266 places, 347 transitions, 4121 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:04:49,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 378 transitions, 5623 flow [2024-06-27 20:04:50,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 378 transitions, 5430 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:50,267 INFO L231 Difference]: Finished difference. Result has 270 places, 364 transitions, 4639 flow [2024-06-27 20:04:50,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=270, PETRI_TRANSITIONS=364} [2024-06-27 20:04:50,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-27 20:04:50,267 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 364 transitions, 4639 flow [2024-06-27 20:04:50,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:50,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:50,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:50,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:04:50,268 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:50,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:50,268 INFO L85 PathProgramCache]: Analyzing trace with hash 461190586, now seen corresponding path program 10 times [2024-06-27 20:04:50,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:50,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481464783] [2024-06-27 20:04:50,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:50,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:51,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:51,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481464783] [2024-06-27 20:04:51,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481464783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:51,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:51,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:51,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788830970] [2024-06-27 20:04:51,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:51,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:51,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:51,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 364 transitions, 4639 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:51,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:51,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:51,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:51,995 INFO L124 PetriNetUnfolderBase]: 2422/3939 cut-off events. [2024-06-27 20:04:51,995 INFO L125 PetriNetUnfolderBase]: For 520144/520152 co-relation queries the response was YES. [2024-06-27 20:04:52,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42343 conditions, 3939 events. 2422/3939 cut-off events. For 520144/520152 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23075 event pairs, 509 based on Foata normal form. 9/3947 useless extension candidates. Maximal degree in co-relation 42217. Up to 3487 conditions per place. [2024-06-27 20:04:52,047 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 105 changer transitions 0/380 dead transitions. [2024-06-27 20:04:52,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 380 transitions, 5786 flow [2024-06-27 20:04:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:52,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:04:52,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:04:52,048 INFO L175 Difference]: Start difference. First operand has 270 places, 364 transitions, 4639 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:04:52,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 380 transitions, 5786 flow [2024-06-27 20:04:52,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 380 transitions, 5515 flow, removed 127 selfloop flow, removed 2 redundant places. [2024-06-27 20:04:52,967 INFO L231 Difference]: Finished difference. Result has 277 places, 367 transitions, 4696 flow [2024-06-27 20:04:52,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4696, PETRI_PLACES=277, PETRI_TRANSITIONS=367} [2024-06-27 20:04:52,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-27 20:04:52,968 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 367 transitions, 4696 flow [2024-06-27 20:04:52,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:52,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:52,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:52,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:04:52,969 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:52,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash 61335784, now seen corresponding path program 11 times [2024-06-27 20:04:52,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:52,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794101728] [2024-06-27 20:04:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:53,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:53,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794101728] [2024-06-27 20:04:53,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794101728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:53,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:53,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544474778] [2024-06-27 20:04:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:53,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:53,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:53,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:53,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 367 transitions, 4696 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:53,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:53,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:53,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:54,639 INFO L124 PetriNetUnfolderBase]: 2416/3920 cut-off events. [2024-06-27 20:04:54,639 INFO L125 PetriNetUnfolderBase]: For 521016/521016 co-relation queries the response was YES. [2024-06-27 20:04:54,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41799 conditions, 3920 events. 2416/3920 cut-off events. For 521016/521016 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22825 event pairs, 505 based on Foata normal form. 2/3921 useless extension candidates. Maximal degree in co-relation 41670. Up to 3604 conditions per place. [2024-06-27 20:04:54,688 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 38 changer transitions 0/378 dead transitions. [2024-06-27 20:04:54,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 378 transitions, 5502 flow [2024-06-27 20:04:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:04:54,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:04:54,689 INFO L175 Difference]: Start difference. First operand has 277 places, 367 transitions, 4696 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:04:54,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 378 transitions, 5502 flow [2024-06-27 20:04:55,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 378 transitions, 5234 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:55,553 INFO L231 Difference]: Finished difference. Result has 281 places, 367 transitions, 4510 flow [2024-06-27 20:04:55,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4510, PETRI_PLACES=281, PETRI_TRANSITIONS=367} [2024-06-27 20:04:55,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 20:04:55,554 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 367 transitions, 4510 flow [2024-06-27 20:04:55,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:55,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:55,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:55,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:04:55,554 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:55,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash 239003356, now seen corresponding path program 11 times [2024-06-27 20:04:55,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:55,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835503673] [2024-06-27 20:04:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:55,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:56,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835503673] [2024-06-27 20:04:56,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835503673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:56,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:56,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753031526] [2024-06-27 20:04:56,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:56,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:56,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:56,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:56,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:56,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:56,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 367 transitions, 4510 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:56,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:56,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:56,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:57,195 INFO L124 PetriNetUnfolderBase]: 2410/3917 cut-off events. [2024-06-27 20:04:57,196 INFO L125 PetriNetUnfolderBase]: For 523358/523366 co-relation queries the response was YES. [2024-06-27 20:04:57,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41315 conditions, 3917 events. 2410/3917 cut-off events. For 523358/523366 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22892 event pairs, 508 based on Foata normal form. 10/3926 useless extension candidates. Maximal degree in co-relation 41185. Up to 3530 conditions per place. [2024-06-27 20:04:57,245 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 66 changer transitions 0/382 dead transitions. [2024-06-27 20:04:57,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 382 transitions, 5526 flow [2024-06-27 20:04:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:04:57,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:04:57,246 INFO L175 Difference]: Start difference. First operand has 281 places, 367 transitions, 4510 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:04:57,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 382 transitions, 5526 flow [2024-06-27 20:04:58,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 382 transitions, 5279 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-27 20:04:58,287 INFO L231 Difference]: Finished difference. Result has 281 places, 369 transitions, 4492 flow [2024-06-27 20:04:58,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4285, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4492, PETRI_PLACES=281, PETRI_TRANSITIONS=369} [2024-06-27 20:04:58,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 20:04:58,288 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 369 transitions, 4492 flow [2024-06-27 20:04:58,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:58,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:58,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:58,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:04:58,288 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:58,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1197511860, now seen corresponding path program 12 times [2024-06-27 20:04:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009877763] [2024-06-27 20:04:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:58,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:58,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009877763] [2024-06-27 20:04:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009877763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:58,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:58,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:58,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787897676] [2024-06-27 20:04:58,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:58,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:59,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:04:59,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 369 transitions, 4492 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:59,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:59,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:04:59,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:59,850 INFO L124 PetriNetUnfolderBase]: 2404/3908 cut-off events. [2024-06-27 20:04:59,850 INFO L125 PetriNetUnfolderBase]: For 526596/526598 co-relation queries the response was YES. [2024-06-27 20:04:59,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41126 conditions, 3908 events. 2404/3908 cut-off events. For 526596/526598 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22825 event pairs, 529 based on Foata normal form. 4/3911 useless extension candidates. Maximal degree in co-relation 40995. Up to 3383 conditions per place. [2024-06-27 20:04:59,899 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 98 changer transitions 0/384 dead transitions. [2024-06-27 20:04:59,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 384 transitions, 5386 flow [2024-06-27 20:04:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:04:59,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:04:59,903 INFO L175 Difference]: Start difference. First operand has 281 places, 369 transitions, 4492 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:04:59,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 384 transitions, 5386 flow [2024-06-27 20:05:00,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 384 transitions, 5139 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:00,973 INFO L231 Difference]: Finished difference. Result has 283 places, 369 transitions, 4447 flow [2024-06-27 20:05:00,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4245, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4447, PETRI_PLACES=283, PETRI_TRANSITIONS=369} [2024-06-27 20:05:00,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-27 20:05:00,973 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 369 transitions, 4447 flow [2024-06-27 20:05:00,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:00,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:00,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:00,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:05:00,974 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:00,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash 238587646, now seen corresponding path program 12 times [2024-06-27 20:05:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:00,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785471491] [2024-06-27 20:05:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:00,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:01,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:01,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785471491] [2024-06-27 20:05:01,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785471491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:01,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:01,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:01,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907485355] [2024-06-27 20:05:01,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:01,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:01,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:01,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:01,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:01,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:01,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 369 transitions, 4447 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:01,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:01,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:01,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:02,703 INFO L124 PetriNetUnfolderBase]: 2398/3901 cut-off events. [2024-06-27 20:05:02,703 INFO L125 PetriNetUnfolderBase]: For 528836/528844 co-relation queries the response was YES. [2024-06-27 20:05:02,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40813 conditions, 3901 events. 2398/3901 cut-off events. For 528836/528844 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22812 event pairs, 505 based on Foata normal form. 10/3910 useless extension candidates. Maximal degree in co-relation 40682. Up to 3540 conditions per place. [2024-06-27 20:05:02,752 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 51 changer transitions 0/382 dead transitions. [2024-06-27 20:05:02,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 382 transitions, 5241 flow [2024-06-27 20:05:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:05:02,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:05:02,753 INFO L175 Difference]: Start difference. First operand has 283 places, 369 transitions, 4447 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:05:02,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 382 transitions, 5241 flow [2024-06-27 20:05:03,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 382 transitions, 4891 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:03,718 INFO L231 Difference]: Finished difference. Result has 284 places, 369 transitions, 4206 flow [2024-06-27 20:05:03,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4206, PETRI_PLACES=284, PETRI_TRANSITIONS=369} [2024-06-27 20:05:03,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 20:05:03,718 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 369 transitions, 4206 flow [2024-06-27 20:05:03,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:03,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:03,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:03,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:05:03,719 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:03,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash 61332808, now seen corresponding path program 4 times [2024-06-27 20:05:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:03,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864330635] [2024-06-27 20:05:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:03,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:04,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:04,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864330635] [2024-06-27 20:05:04,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864330635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:04,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:04,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:04,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592856971] [2024-06-27 20:05:04,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:04,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:04,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:04,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:04,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:04,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:04,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 369 transitions, 4206 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:04,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:04,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:04,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:05,291 INFO L124 PetriNetUnfolderBase]: 2393/3891 cut-off events. [2024-06-27 20:05:05,291 INFO L125 PetriNetUnfolderBase]: For 530457/530457 co-relation queries the response was YES. [2024-06-27 20:05:05,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40348 conditions, 3891 events. 2393/3891 cut-off events. For 530457/530457 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22675 event pairs, 505 based on Foata normal form. 2/3892 useless extension candidates. Maximal degree in co-relation 40216. Up to 3573 conditions per place. [2024-06-27 20:05:05,341 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 340 selfloop transitions, 37 changer transitions 0/382 dead transitions. [2024-06-27 20:05:05,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 382 transitions, 5070 flow [2024-06-27 20:05:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:05:05,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:05:05,342 INFO L175 Difference]: Start difference. First operand has 284 places, 369 transitions, 4206 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:05:05,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 382 transitions, 5070 flow [2024-06-27 20:05:06,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 382 transitions, 4965 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:06,289 INFO L231 Difference]: Finished difference. Result has 286 places, 371 transitions, 4266 flow [2024-06-27 20:05:06,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4266, PETRI_PLACES=286, PETRI_TRANSITIONS=371} [2024-06-27 20:05:06,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-27 20:05:06,290 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 371 transitions, 4266 flow [2024-06-27 20:05:06,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:06,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:06,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:06,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:05:06,290 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:06,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash 593481340, now seen corresponding path program 2 times [2024-06-27 20:05:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:06,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009511285] [2024-06-27 20:05:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:06,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:07,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:07,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009511285] [2024-06-27 20:05:07,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009511285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:07,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:07,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:07,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538548508] [2024-06-27 20:05:07,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:07,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:07,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:07,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:07,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:05:07,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 371 transitions, 4266 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:07,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:07,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:05:07,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:08,299 INFO L124 PetriNetUnfolderBase]: 2276/3736 cut-off events. [2024-06-27 20:05:08,300 INFO L125 PetriNetUnfolderBase]: For 537536/537544 co-relation queries the response was YES. [2024-06-27 20:05:08,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39492 conditions, 3736 events. 2276/3736 cut-off events. For 537536/537544 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22080 event pairs, 474 based on Foata normal form. 10/3722 useless extension candidates. Maximal degree in co-relation 39359. Up to 3308 conditions per place. [2024-06-27 20:05:08,347 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 318 selfloop transitions, 21 changer transitions 0/384 dead transitions. [2024-06-27 20:05:08,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 384 transitions, 5062 flow [2024-06-27 20:05:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:05:08,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:05:08,348 INFO L175 Difference]: Start difference. First operand has 286 places, 371 transitions, 4266 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:05:08,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 384 transitions, 5062 flow [2024-06-27 20:05:09,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 384 transitions, 4913 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:09,292 INFO L231 Difference]: Finished difference. Result has 288 places, 374 transitions, 4266 flow [2024-06-27 20:05:09,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4117, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4266, PETRI_PLACES=288, PETRI_TRANSITIONS=374} [2024-06-27 20:05:09,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-27 20:05:09,293 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 374 transitions, 4266 flow [2024-06-27 20:05:09,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:09,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:09,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:09,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:05:09,293 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:09,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash 461199514, now seen corresponding path program 3 times [2024-06-27 20:05:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:09,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62342134] [2024-06-27 20:05:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:09,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:10,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:10,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62342134] [2024-06-27 20:05:10,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62342134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:10,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:10,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:10,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273152489] [2024-06-27 20:05:10,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:10,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:10,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:10,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:10,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:10,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:05:10,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 374 transitions, 4266 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:10,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:10,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:05:10,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:11,176 INFO L124 PetriNetUnfolderBase]: 2262/3708 cut-off events. [2024-06-27 20:05:11,177 INFO L125 PetriNetUnfolderBase]: For 548765/548777 co-relation queries the response was YES. [2024-06-27 20:05:11,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39204 conditions, 3708 events. 2262/3708 cut-off events. For 548765/548777 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21843 event pairs, 473 based on Foata normal form. 9/3687 useless extension candidates. Maximal degree in co-relation 39070. Up to 3206 conditions per place. [2024-06-27 20:05:11,226 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 271 selfloop transitions, 71 changer transitions 0/387 dead transitions. [2024-06-27 20:05:11,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 387 transitions, 5074 flow [2024-06-27 20:05:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:05:11,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:05:11,227 INFO L175 Difference]: Start difference. First operand has 288 places, 374 transitions, 4266 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:05:11,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 387 transitions, 5074 flow [2024-06-27 20:05:12,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 387 transitions, 4957 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:12,137 INFO L231 Difference]: Finished difference. Result has 290 places, 377 transitions, 4404 flow [2024-06-27 20:05:12,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4404, PETRI_PLACES=290, PETRI_TRANSITIONS=377} [2024-06-27 20:05:12,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-27 20:05:12,138 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 377 transitions, 4404 flow [2024-06-27 20:05:12,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:12,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:12,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:12,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:05:12,139 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:12,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:12,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1695986528, now seen corresponding path program 1 times [2024-06-27 20:05:12,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:12,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774338147] [2024-06-27 20:05:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:12,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:12,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774338147] [2024-06-27 20:05:12,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774338147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:12,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:12,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:12,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891208159] [2024-06-27 20:05:12,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:12,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:12,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:12,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:12,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:13,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:05:13,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 377 transitions, 4404 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:13,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:13,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:05:13,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:13,841 INFO L124 PetriNetUnfolderBase]: 2329/3825 cut-off events. [2024-06-27 20:05:13,841 INFO L125 PetriNetUnfolderBase]: For 569733/569733 co-relation queries the response was YES. [2024-06-27 20:05:13,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40867 conditions, 3825 events. 2329/3825 cut-off events. For 569733/569733 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 22627 event pairs, 441 based on Foata normal form. 2/3826 useless extension candidates. Maximal degree in co-relation 40732. Up to 3423 conditions per place. [2024-06-27 20:05:13,891 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 357 selfloop transitions, 15 changer transitions 0/400 dead transitions. [2024-06-27 20:05:13,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 400 transitions, 5286 flow [2024-06-27 20:05:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:05:13,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:05:13,892 INFO L175 Difference]: Start difference. First operand has 290 places, 377 transitions, 4404 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:05:13,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 400 transitions, 5286 flow [2024-06-27 20:05:14,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 400 transitions, 5057 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:14,912 INFO L231 Difference]: Finished difference. Result has 292 places, 379 transitions, 4292 flow [2024-06-27 20:05:14,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4292, PETRI_PLACES=292, PETRI_TRANSITIONS=379} [2024-06-27 20:05:14,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-27 20:05:14,913 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 379 transitions, 4292 flow [2024-06-27 20:05:14,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:14,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:14,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:14,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:05:14,913 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:14,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1696046978, now seen corresponding path program 2 times [2024-06-27 20:05:14,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:14,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714861235] [2024-06-27 20:05:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:14,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:15,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714861235] [2024-06-27 20:05:15,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714861235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:15,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:15,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:15,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111964321] [2024-06-27 20:05:15,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:15,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:15,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:15,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:05:15,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 379 transitions, 4292 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:15,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:15,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:05:15,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:16,690 INFO L124 PetriNetUnfolderBase]: 2344/3846 cut-off events. [2024-06-27 20:05:16,690 INFO L125 PetriNetUnfolderBase]: For 557928/557928 co-relation queries the response was YES. [2024-06-27 20:05:16,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40708 conditions, 3846 events. 2344/3846 cut-off events. For 557928/557928 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22728 event pairs, 480 based on Foata normal form. 2/3847 useless extension candidates. Maximal degree in co-relation 40572. Up to 3459 conditions per place. [2024-06-27 20:05:16,745 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 18 changer transitions 0/399 dead transitions. [2024-06-27 20:05:16,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 399 transitions, 5177 flow [2024-06-27 20:05:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:05:16,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 20:05:16,747 INFO L175 Difference]: Start difference. First operand has 292 places, 379 transitions, 4292 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:05:16,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 399 transitions, 5177 flow [2024-06-27 20:05:17,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 399 transitions, 5074 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:17,879 INFO L231 Difference]: Finished difference. Result has 295 places, 382 transitions, 4329 flow [2024-06-27 20:05:17,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4191, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4329, PETRI_PLACES=295, PETRI_TRANSITIONS=382} [2024-06-27 20:05:17,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-27 20:05:17,879 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 382 transitions, 4329 flow [2024-06-27 20:05:17,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:17,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:17,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:17,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:05:17,880 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:17,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1814134658, now seen corresponding path program 3 times [2024-06-27 20:05:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:17,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362294977] [2024-06-27 20:05:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:17,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362294977] [2024-06-27 20:05:18,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362294977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:18,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:18,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003759372] [2024-06-27 20:05:18,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:18,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:18,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:18,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:18,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:05:18,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 382 transitions, 4329 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:18,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:18,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:05:18,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:19,728 INFO L124 PetriNetUnfolderBase]: 2352/3858 cut-off events. [2024-06-27 20:05:19,729 INFO L125 PetriNetUnfolderBase]: For 572030/572030 co-relation queries the response was YES. [2024-06-27 20:05:19,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40973 conditions, 3858 events. 2352/3858 cut-off events. For 572030/572030 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 22761 event pairs, 478 based on Foata normal form. 2/3859 useless extension candidates. Maximal degree in co-relation 40836. Up to 3477 conditions per place. [2024-06-27 20:05:19,774 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 356 selfloop transitions, 17 changer transitions 0/401 dead transitions. [2024-06-27 20:05:19,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 401 transitions, 5234 flow [2024-06-27 20:05:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:05:19,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:05:19,775 INFO L175 Difference]: Start difference. First operand has 295 places, 382 transitions, 4329 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:05:19,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 401 transitions, 5234 flow [2024-06-27 20:05:20,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 401 transitions, 5123 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:20,863 INFO L231 Difference]: Finished difference. Result has 298 places, 387 transitions, 4388 flow [2024-06-27 20:05:20,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4218, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4388, PETRI_PLACES=298, PETRI_TRANSITIONS=387} [2024-06-27 20:05:20,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-27 20:05:20,864 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 387 transitions, 4388 flow [2024-06-27 20:05:20,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:20,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:20,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:20,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:05:20,864 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:20,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash 238833538, now seen corresponding path program 4 times [2024-06-27 20:05:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51921883] [2024-06-27 20:05:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:20,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:21,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:21,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51921883] [2024-06-27 20:05:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51921883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:21,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:21,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:21,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029020089] [2024-06-27 20:05:21,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:21,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:21,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:21,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:05:21,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 387 transitions, 4388 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:21,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:21,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:05:21,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:22,983 INFO L124 PetriNetUnfolderBase]: 2347/3850 cut-off events. [2024-06-27 20:05:22,983 INFO L125 PetriNetUnfolderBase]: For 573899/573901 co-relation queries the response was YES. [2024-06-27 20:05:23,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40786 conditions, 3850 events. 2347/3850 cut-off events. For 573899/573901 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22727 event pairs, 479 based on Foata normal form. 4/3853 useless extension candidates. Maximal degree in co-relation 40647. Up to 3461 conditions per place. [2024-06-27 20:05:23,051 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 351 selfloop transitions, 24 changer transitions 0/403 dead transitions. [2024-06-27 20:05:23,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 403 transitions, 5291 flow [2024-06-27 20:05:23,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:05:23,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:05:23,052 INFO L175 Difference]: Start difference. First operand has 298 places, 387 transitions, 4388 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:05:23,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 403 transitions, 5291 flow [2024-06-27 20:05:24,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 403 transitions, 5178 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:24,254 INFO L231 Difference]: Finished difference. Result has 302 places, 392 transitions, 4463 flow [2024-06-27 20:05:24,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4463, PETRI_PLACES=302, PETRI_TRANSITIONS=392} [2024-06-27 20:05:24,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 20:05:24,255 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 392 transitions, 4463 flow [2024-06-27 20:05:24,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:24,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:24,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:24,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:05:24,255 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:24,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash 475193596, now seen corresponding path program 1 times [2024-06-27 20:05:24,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:24,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294329426] [2024-06-27 20:05:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:24,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:25,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294329426] [2024-06-27 20:05:25,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294329426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:25,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:25,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83472122] [2024-06-27 20:05:25,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:25,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:25,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 392 transitions, 4463 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:25,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:25,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:25,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:26,326 INFO L124 PetriNetUnfolderBase]: 2426/3935 cut-off events. [2024-06-27 20:05:26,326 INFO L125 PetriNetUnfolderBase]: For 577203/577205 co-relation queries the response was YES. [2024-06-27 20:05:26,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41341 conditions, 3935 events. 2426/3935 cut-off events. For 577203/577205 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 22918 event pairs, 499 based on Foata normal form. 3/3937 useless extension candidates. Maximal degree in co-relation 41200. Up to 3637 conditions per place. [2024-06-27 20:05:26,378 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 351 selfloop transitions, 53 changer transitions 0/409 dead transitions. [2024-06-27 20:05:26,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 409 transitions, 5381 flow [2024-06-27 20:05:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:05:26,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:05:26,379 INFO L175 Difference]: Start difference. First operand has 302 places, 392 transitions, 4463 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:05:26,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 409 transitions, 5381 flow [2024-06-27 20:05:27,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 409 transitions, 5248 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:27,462 INFO L231 Difference]: Finished difference. Result has 306 places, 398 transitions, 4530 flow [2024-06-27 20:05:27,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4530, PETRI_PLACES=306, PETRI_TRANSITIONS=398} [2024-06-27 20:05:27,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-27 20:05:27,462 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 398 transitions, 4530 flow [2024-06-27 20:05:27,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:27,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:27,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:27,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:05:27,463 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:27,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash -810323934, now seen corresponding path program 2 times [2024-06-27 20:05:27,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:27,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547689226] [2024-06-27 20:05:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:27,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:28,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:28,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547689226] [2024-06-27 20:05:28,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547689226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:28,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:28,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:28,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481275736] [2024-06-27 20:05:28,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:28,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:28,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:28,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:28,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:28,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 398 transitions, 4530 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:28,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:28,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:28,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:29,553 INFO L124 PetriNetUnfolderBase]: 2431/3948 cut-off events. [2024-06-27 20:05:29,553 INFO L125 PetriNetUnfolderBase]: For 586292/586294 co-relation queries the response was YES. [2024-06-27 20:05:29,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41464 conditions, 3948 events. 2431/3948 cut-off events. For 586292/586294 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23062 event pairs, 497 based on Foata normal form. 3/3950 useless extension candidates. Maximal degree in co-relation 41322. Up to 3622 conditions per place. [2024-06-27 20:05:29,610 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 341 selfloop transitions, 69 changer transitions 0/415 dead transitions. [2024-06-27 20:05:29,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 415 transitions, 5668 flow [2024-06-27 20:05:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:05:29,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:05:29,611 INFO L175 Difference]: Start difference. First operand has 306 places, 398 transitions, 4530 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:05:29,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 415 transitions, 5668 flow [2024-06-27 20:05:30,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 415 transitions, 5287 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-27 20:05:30,971 INFO L231 Difference]: Finished difference. Result has 305 places, 403 transitions, 4407 flow [2024-06-27 20:05:30,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4407, PETRI_PLACES=305, PETRI_TRANSITIONS=403} [2024-06-27 20:05:30,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-27 20:05:30,971 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 403 transitions, 4407 flow [2024-06-27 20:05:30,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:30,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:30,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:05:30,972 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:30,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash 986662462, now seen corresponding path program 3 times [2024-06-27 20:05:30,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:30,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959038974] [2024-06-27 20:05:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:32,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:32,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959038974] [2024-06-27 20:05:32,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959038974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:32,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:32,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:32,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775672036] [2024-06-27 20:05:32,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:32,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:32,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:32,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:32,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 403 transitions, 4407 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:32,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:32,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:32,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:33,013 INFO L124 PetriNetUnfolderBase]: 2426/3940 cut-off events. [2024-06-27 20:05:33,013 INFO L125 PetriNetUnfolderBase]: For 592383/592385 co-relation queries the response was YES. [2024-06-27 20:05:33,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40933 conditions, 3940 events. 2426/3940 cut-off events. For 592383/592385 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22994 event pairs, 497 based on Foata normal form. 3/3942 useless extension candidates. Maximal degree in co-relation 40795. Up to 3616 conditions per place. [2024-06-27 20:05:33,060 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 63 changer transitions 0/413 dead transitions. [2024-06-27 20:05:33,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 413 transitions, 5249 flow [2024-06-27 20:05:33,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:05:33,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:05:33,061 INFO L175 Difference]: Start difference. First operand has 305 places, 403 transitions, 4407 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:05:33,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 413 transitions, 5249 flow [2024-06-27 20:05:34,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 413 transitions, 5106 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:34,232 INFO L231 Difference]: Finished difference. Result has 308 places, 403 transitions, 4398 flow [2024-06-27 20:05:34,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4398, PETRI_PLACES=308, PETRI_TRANSITIONS=403} [2024-06-27 20:05:34,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-27 20:05:34,233 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 403 transitions, 4398 flow [2024-06-27 20:05:34,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:34,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:34,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:05:34,234 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:34,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash -554461430, now seen corresponding path program 1 times [2024-06-27 20:05:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197859645] [2024-06-27 20:05:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:34,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:34,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197859645] [2024-06-27 20:05:34,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197859645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:34,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:34,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737641378] [2024-06-27 20:05:34,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:34,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:34,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:35,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:35,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 403 transitions, 4398 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:35,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:35,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:35,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:36,062 INFO L124 PetriNetUnfolderBase]: 2431/3948 cut-off events. [2024-06-27 20:05:36,062 INFO L125 PetriNetUnfolderBase]: For 604764/604768 co-relation queries the response was YES. [2024-06-27 20:05:36,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41274 conditions, 3948 events. 2431/3948 cut-off events. For 604764/604768 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23007 event pairs, 482 based on Foata normal form. 5/3952 useless extension candidates. Maximal degree in co-relation 41134. Up to 3613 conditions per place. [2024-06-27 20:05:36,120 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 392 selfloop transitions, 37 changer transitions 0/434 dead transitions. [2024-06-27 20:05:36,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 434 transitions, 5502 flow [2024-06-27 20:05:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:05:36,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:05:36,121 INFO L175 Difference]: Start difference. First operand has 308 places, 403 transitions, 4398 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:05:36,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 434 transitions, 5502 flow [2024-06-27 20:05:37,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 434 transitions, 5374 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:37,308 INFO L231 Difference]: Finished difference. Result has 312 places, 406 transitions, 4517 flow [2024-06-27 20:05:37,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4270, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4517, PETRI_PLACES=312, PETRI_TRANSITIONS=406} [2024-06-27 20:05:37,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-27 20:05:37,309 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 406 transitions, 4517 flow [2024-06-27 20:05:37,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:37,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:37,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:37,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:05:37,309 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:37,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash -554341274, now seen corresponding path program 1 times [2024-06-27 20:05:37,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:37,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047597458] [2024-06-27 20:05:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:37,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:38,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:38,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047597458] [2024-06-27 20:05:38,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047597458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:38,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:38,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:38,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175491872] [2024-06-27 20:05:38,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:38,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:38,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:38,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:38,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 406 transitions, 4517 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:38,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:38,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:38,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:39,125 INFO L124 PetriNetUnfolderBase]: 2441/3960 cut-off events. [2024-06-27 20:05:39,125 INFO L125 PetriNetUnfolderBase]: For 627792/627796 co-relation queries the response was YES. [2024-06-27 20:05:39,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41961 conditions, 3960 events. 2441/3960 cut-off events. For 627792/627796 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 23106 event pairs, 517 based on Foata normal form. 6/3965 useless extension candidates. Maximal degree in co-relation 41820. Up to 3636 conditions per place. [2024-06-27 20:05:39,175 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 396 selfloop transitions, 35 changer transitions 0/436 dead transitions. [2024-06-27 20:05:39,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 436 transitions, 5647 flow [2024-06-27 20:05:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:39,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:05:39,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:05:39,176 INFO L175 Difference]: Start difference. First operand has 312 places, 406 transitions, 4517 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:05:39,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 436 transitions, 5647 flow [2024-06-27 20:05:40,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 436 transitions, 5418 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:40,414 INFO L231 Difference]: Finished difference. Result has 314 places, 410 transitions, 4531 flow [2024-06-27 20:05:40,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4531, PETRI_PLACES=314, PETRI_TRANSITIONS=410} [2024-06-27 20:05:40,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-27 20:05:40,414 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 410 transitions, 4531 flow [2024-06-27 20:05:40,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:40,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:40,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:40,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:05:40,415 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:40,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash 578407438, now seen corresponding path program 2 times [2024-06-27 20:05:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:40,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022695013] [2024-06-27 20:05:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:40,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:41,309 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 20:05:41,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:41,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022695013] [2024-06-27 20:05:41,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022695013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:41,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:41,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:41,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442818312] [2024-06-27 20:05:41,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:41,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:41,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:41,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:41,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:41,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 410 transitions, 4531 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:41,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:41,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:41,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:42,354 INFO L124 PetriNetUnfolderBase]: 2467/3996 cut-off events. [2024-06-27 20:05:42,354 INFO L125 PetriNetUnfolderBase]: For 653734/653738 co-relation queries the response was YES. [2024-06-27 20:05:42,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43141 conditions, 3996 events. 2467/3996 cut-off events. For 653734/653738 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23278 event pairs, 517 based on Foata normal form. 5/4000 useless extension candidates. Maximal degree in co-relation 42999. Up to 3645 conditions per place. [2024-06-27 20:05:42,404 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 393 selfloop transitions, 50 changer transitions 0/448 dead transitions. [2024-06-27 20:05:42,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 448 transitions, 6008 flow [2024-06-27 20:05:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:05:42,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:05:42,406 INFO L175 Difference]: Start difference. First operand has 314 places, 410 transitions, 4531 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:05:42,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 448 transitions, 6008 flow [2024-06-27 20:05:43,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 448 transitions, 5793 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:43,531 INFO L231 Difference]: Finished difference. Result has 318 places, 420 transitions, 4741 flow [2024-06-27 20:05:43,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4741, PETRI_PLACES=318, PETRI_TRANSITIONS=420} [2024-06-27 20:05:43,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-27 20:05:43,531 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 420 transitions, 4741 flow [2024-06-27 20:05:43,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:43,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:43,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:43,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:05:43,532 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:43,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -742793268, now seen corresponding path program 3 times [2024-06-27 20:05:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:43,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826601107] [2024-06-27 20:05:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:44,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826601107] [2024-06-27 20:05:44,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826601107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:44,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:44,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:44,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506338672] [2024-06-27 20:05:44,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:44,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:44,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:44,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:44,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:44,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:44,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 420 transitions, 4741 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:44,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:44,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:44,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:45,535 INFO L124 PetriNetUnfolderBase]: 2461/3988 cut-off events. [2024-06-27 20:05:45,535 INFO L125 PetriNetUnfolderBase]: For 670860/670864 co-relation queries the response was YES. [2024-06-27 20:05:45,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43484 conditions, 3988 events. 2461/3988 cut-off events. For 670860/670864 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23238 event pairs, 481 based on Foata normal form. 6/3993 useless extension candidates. Maximal degree in co-relation 43340. Up to 3651 conditions per place. [2024-06-27 20:05:45,587 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 402 selfloop transitions, 41 changer transitions 0/448 dead transitions. [2024-06-27 20:05:45,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 448 transitions, 5785 flow [2024-06-27 20:05:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 20:05:45,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 20:05:45,588 INFO L175 Difference]: Start difference. First operand has 318 places, 420 transitions, 4741 flow. Second operand 10 states and 179 transitions. [2024-06-27 20:05:45,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 448 transitions, 5785 flow [2024-06-27 20:05:47,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 448 transitions, 5499 flow, removed 118 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:47,080 INFO L231 Difference]: Finished difference. Result has 322 places, 420 transitions, 4544 flow [2024-06-27 20:05:47,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4544, PETRI_PLACES=322, PETRI_TRANSITIONS=420} [2024-06-27 20:05:47,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-27 20:05:47,080 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 420 transitions, 4544 flow [2024-06-27 20:05:47,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:47,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:47,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:47,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:05:47,081 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:47,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:47,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1640985970, now seen corresponding path program 2 times [2024-06-27 20:05:47,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:47,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586459122] [2024-06-27 20:05:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:47,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:47,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:47,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586459122] [2024-06-27 20:05:47,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586459122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:47,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:47,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:47,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410944221] [2024-06-27 20:05:47,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:47,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:47,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:47,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:47,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:47,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:47,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 420 transitions, 4544 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:47,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:47,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:47,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:49,016 INFO L124 PetriNetUnfolderBase]: 2477/4014 cut-off events. [2024-06-27 20:05:49,016 INFO L125 PetriNetUnfolderBase]: For 677418/677418 co-relation queries the response was YES. [2024-06-27 20:05:49,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43705 conditions, 4014 events. 2477/4014 cut-off events. For 677418/677418 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23469 event pairs, 493 based on Foata normal form. 1/4013 useless extension candidates. Maximal degree in co-relation 43559. Up to 3553 conditions per place. [2024-06-27 20:05:49,069 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 382 selfloop transitions, 64 changer transitions 0/451 dead transitions. [2024-06-27 20:05:49,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 451 transitions, 5712 flow [2024-06-27 20:05:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:05:49,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 20:05:49,070 INFO L175 Difference]: Start difference. First operand has 322 places, 420 transitions, 4544 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:05:49,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 451 transitions, 5712 flow [2024-06-27 20:05:50,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 451 transitions, 5619 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 20:05:50,565 INFO L231 Difference]: Finished difference. Result has 323 places, 426 transitions, 4793 flow [2024-06-27 20:05:50,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4793, PETRI_PLACES=323, PETRI_TRANSITIONS=426} [2024-06-27 20:05:50,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-27 20:05:50,566 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 426 transitions, 4793 flow [2024-06-27 20:05:50,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:50,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:50,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:50,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:05:50,566 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:50,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:50,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1640865814, now seen corresponding path program 4 times [2024-06-27 20:05:50,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:50,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820057627] [2024-06-27 20:05:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:50,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:51,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:51,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820057627] [2024-06-27 20:05:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820057627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:51,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:51,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:51,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359617330] [2024-06-27 20:05:51,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:51,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:51,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:51,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:51,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:51,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 426 transitions, 4793 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:51,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:51,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:51,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:52,390 INFO L124 PetriNetUnfolderBase]: 2487/4029 cut-off events. [2024-06-27 20:05:52,390 INFO L125 PetriNetUnfolderBase]: For 703356/703358 co-relation queries the response was YES. [2024-06-27 20:05:52,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44511 conditions, 4029 events. 2487/4029 cut-off events. For 703356/703358 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23507 event pairs, 525 based on Foata normal form. 4/4032 useless extension candidates. Maximal degree in co-relation 44364. Up to 3653 conditions per place. [2024-06-27 20:05:52,441 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 403 selfloop transitions, 45 changer transitions 0/453 dead transitions. [2024-06-27 20:05:52,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 453 transitions, 5973 flow [2024-06-27 20:05:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:05:52,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:05:52,442 INFO L175 Difference]: Start difference. First operand has 323 places, 426 transitions, 4793 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:05:52,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 453 transitions, 5973 flow [2024-06-27 20:05:54,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 453 transitions, 5683 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:54,047 INFO L231 Difference]: Finished difference. Result has 326 places, 430 transitions, 4788 flow [2024-06-27 20:05:54,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4788, PETRI_PLACES=326, PETRI_TRANSITIONS=430} [2024-06-27 20:05:54,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-27 20:05:54,047 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 430 transitions, 4788 flow [2024-06-27 20:05:54,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:54,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:54,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:54,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:05:54,048 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:54,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1635623590, now seen corresponding path program 3 times [2024-06-27 20:05:54,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:54,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266283926] [2024-06-27 20:05:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:54,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266283926] [2024-06-27 20:05:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266283926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:54,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:54,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050435753] [2024-06-27 20:05:54,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:54,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:54,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:54,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:54,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 430 transitions, 4788 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:54,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:54,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:54,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:56,016 INFO L124 PetriNetUnfolderBase]: 2492/4037 cut-off events. [2024-06-27 20:05:56,016 INFO L125 PetriNetUnfolderBase]: For 718054/718054 co-relation queries the response was YES. [2024-06-27 20:05:56,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45127 conditions, 4037 events. 2492/4037 cut-off events. For 718054/718054 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23642 event pairs, 529 based on Foata normal form. 1/4036 useless extension candidates. Maximal degree in co-relation 44979. Up to 3574 conditions per place. [2024-06-27 20:05:56,070 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 388 selfloop transitions, 65 changer transitions 0/458 dead transitions. [2024-06-27 20:05:56,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 458 transitions, 5952 flow [2024-06-27 20:05:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:05:56,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:05:56,071 INFO L175 Difference]: Start difference. First operand has 326 places, 430 transitions, 4788 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:05:56,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 458 transitions, 5952 flow [2024-06-27 20:05:57,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 458 transitions, 5695 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:57,670 INFO L231 Difference]: Finished difference. Result has 328 places, 433 transitions, 4857 flow [2024-06-27 20:05:57,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4857, PETRI_PLACES=328, PETRI_TRANSITIONS=433} [2024-06-27 20:05:57,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-27 20:05:57,670 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 433 transitions, 4857 flow [2024-06-27 20:05:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:57,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:57,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:57,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:05:57,671 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:57,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash -410272370, now seen corresponding path program 4 times [2024-06-27 20:05:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:57,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883882404] [2024-06-27 20:05:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:58,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883882404] [2024-06-27 20:05:58,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883882404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:58,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:58,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:58,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915732860] [2024-06-27 20:05:58,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:58,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:58,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:58,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:58,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:05:58,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 433 transitions, 4857 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:58,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:58,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:05:58,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:59,594 INFO L124 PetriNetUnfolderBase]: 2497/4044 cut-off events. [2024-06-27 20:05:59,594 INFO L125 PetriNetUnfolderBase]: For 737675/737675 co-relation queries the response was YES. [2024-06-27 20:05:59,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45652 conditions, 4044 events. 2497/4044 cut-off events. For 737675/737675 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23657 event pairs, 529 based on Foata normal form. 1/4043 useless extension candidates. Maximal degree in co-relation 45503. Up to 3567 conditions per place. [2024-06-27 20:05:59,650 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 377 selfloop transitions, 76 changer transitions 0/458 dead transitions. [2024-06-27 20:05:59,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 458 transitions, 6017 flow [2024-06-27 20:05:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:59,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:05:59,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 20:05:59,653 INFO L175 Difference]: Start difference. First operand has 328 places, 433 transitions, 4857 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:05:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 458 transitions, 6017 flow [2024-06-27 20:06:01,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 458 transitions, 5692 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-27 20:06:01,194 INFO L231 Difference]: Finished difference. Result has 329 places, 436 transitions, 4886 flow [2024-06-27 20:06:01,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4532, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4886, PETRI_PLACES=329, PETRI_TRANSITIONS=436} [2024-06-27 20:06:01,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 20:06:01,195 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 436 transitions, 4886 flow [2024-06-27 20:06:01,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:01,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:01,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:06:01,195 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:01,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1635324688, now seen corresponding path program 1 times [2024-06-27 20:06:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027377351] [2024-06-27 20:06:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:01,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:02,087 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 20:06:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027377351] [2024-06-27 20:06:02,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027377351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:02,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:02,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:02,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394245558] [2024-06-27 20:06:02,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:02,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:02,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:02,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:02,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:02,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 436 transitions, 4886 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:02,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:02,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:02,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:03,207 INFO L124 PetriNetUnfolderBase]: 2502/4055 cut-off events. [2024-06-27 20:06:03,207 INFO L125 PetriNetUnfolderBase]: For 756197/756201 co-relation queries the response was YES. [2024-06-27 20:06:03,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46099 conditions, 4055 events. 2502/4055 cut-off events. For 756197/756201 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23751 event pairs, 524 based on Foata normal form. 5/4058 useless extension candidates. Maximal degree in co-relation 45949. Up to 3716 conditions per place. [2024-06-27 20:06:03,265 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 420 selfloop transitions, 37 changer transitions 0/462 dead transitions. [2024-06-27 20:06:03,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 462 transitions, 6004 flow [2024-06-27 20:06:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:06:03,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:06:03,266 INFO L175 Difference]: Start difference. First operand has 329 places, 436 transitions, 4886 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:06:03,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 462 transitions, 6004 flow [2024-06-27 20:06:04,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 462 transitions, 5672 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:04,940 INFO L231 Difference]: Finished difference. Result has 331 places, 439 transitions, 4774 flow [2024-06-27 20:06:04,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4554, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4774, PETRI_PLACES=331, PETRI_TRANSITIONS=439} [2024-06-27 20:06:04,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-27 20:06:04,943 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 439 transitions, 4774 flow [2024-06-27 20:06:04,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:04,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:04,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:04,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:06:04,943 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:04,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 590249340, now seen corresponding path program 5 times [2024-06-27 20:06:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215555568] [2024-06-27 20:06:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:05,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:05,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215555568] [2024-06-27 20:06:05,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215555568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:05,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:05,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047529318] [2024-06-27 20:06:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:05,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:05,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:05,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:05,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 439 transitions, 4774 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:05,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:05,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:05,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:06,730 INFO L124 PetriNetUnfolderBase]: 2512/4070 cut-off events. [2024-06-27 20:06:06,730 INFO L125 PetriNetUnfolderBase]: For 777349/777351 co-relation queries the response was YES. [2024-06-27 20:06:06,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46514 conditions, 4070 events. 2512/4070 cut-off events. For 777349/777351 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23914 event pairs, 524 based on Foata normal form. 4/4073 useless extension candidates. Maximal degree in co-relation 46363. Up to 3666 conditions per place. [2024-06-27 20:06:06,786 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 407 selfloop transitions, 53 changer transitions 0/465 dead transitions. [2024-06-27 20:06:06,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 465 transitions, 6040 flow [2024-06-27 20:06:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:06:06,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:06:06,787 INFO L175 Difference]: Start difference. First operand has 331 places, 439 transitions, 4774 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:06:06,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 465 transitions, 6040 flow [2024-06-27 20:06:08,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 465 transitions, 5842 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:08,649 INFO L231 Difference]: Finished difference. Result has 333 places, 443 transitions, 4897 flow [2024-06-27 20:06:08,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4576, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4897, PETRI_PLACES=333, PETRI_TRANSITIONS=443} [2024-06-27 20:06:08,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-27 20:06:08,650 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 443 transitions, 4897 flow [2024-06-27 20:06:08,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:08,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:08,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:08,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:06:08,651 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:08,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash -406547534, now seen corresponding path program 6 times [2024-06-27 20:06:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:08,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917935441] [2024-06-27 20:06:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:08,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:09,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:09,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917935441] [2024-06-27 20:06:09,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917935441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:09,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:09,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:09,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139251374] [2024-06-27 20:06:09,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:09,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:09,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:09,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:09,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 443 transitions, 4897 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:09,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:09,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:09,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:10,554 INFO L124 PetriNetUnfolderBase]: 2522/4086 cut-off events. [2024-06-27 20:06:10,554 INFO L125 PetriNetUnfolderBase]: For 801705/801707 co-relation queries the response was YES. [2024-06-27 20:06:10,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47409 conditions, 4086 events. 2522/4086 cut-off events. For 801705/801707 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24025 event pairs, 488 based on Foata normal form. 4/4089 useless extension candidates. Maximal degree in co-relation 47257. Up to 3656 conditions per place. [2024-06-27 20:06:10,611 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 395 selfloop transitions, 68 changer transitions 0/468 dead transitions. [2024-06-27 20:06:10,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 468 transitions, 6137 flow [2024-06-27 20:06:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:06:10,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:06:10,613 INFO L175 Difference]: Start difference. First operand has 333 places, 443 transitions, 4897 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:06:10,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 468 transitions, 6137 flow [2024-06-27 20:06:12,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 468 transitions, 5844 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:12,423 INFO L231 Difference]: Finished difference. Result has 335 places, 447 transitions, 4963 flow [2024-06-27 20:06:12,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4963, PETRI_PLACES=335, PETRI_TRANSITIONS=447} [2024-06-27 20:06:12,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-27 20:06:12,423 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 447 transitions, 4963 flow [2024-06-27 20:06:12,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:12,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:12,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:12,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:06:12,424 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:12,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 424966857, now seen corresponding path program 1 times [2024-06-27 20:06:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:12,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109332916] [2024-06-27 20:06:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:13,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:13,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109332916] [2024-06-27 20:06:13,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109332916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:13,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:13,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:13,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755229748] [2024-06-27 20:06:13,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:13,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:13,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:13,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:13,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:13,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 447 transitions, 4963 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:13,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:13,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:13,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:14,416 INFO L124 PetriNetUnfolderBase]: 2542/4116 cut-off events. [2024-06-27 20:06:14,416 INFO L125 PetriNetUnfolderBase]: For 834989/834995 co-relation queries the response was YES. [2024-06-27 20:06:14,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48355 conditions, 4116 events. 2542/4116 cut-off events. For 834989/834995 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24162 event pairs, 519 based on Foata normal form. 10/4125 useless extension candidates. Maximal degree in co-relation 48202. Up to 3790 conditions per place. [2024-06-27 20:06:14,482 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 436 selfloop transitions, 32 changer transitions 0/473 dead transitions. [2024-06-27 20:06:14,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 473 transitions, 6171 flow [2024-06-27 20:06:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:06:14,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:06:14,483 INFO L175 Difference]: Start difference. First operand has 335 places, 447 transitions, 4963 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:06:14,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 473 transitions, 6171 flow [2024-06-27 20:06:16,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 473 transitions, 5840 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:16,437 INFO L231 Difference]: Finished difference. Result has 337 places, 451 transitions, 4897 flow [2024-06-27 20:06:16,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4897, PETRI_PLACES=337, PETRI_TRANSITIONS=451} [2024-06-27 20:06:16,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-27 20:06:16,437 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 451 transitions, 4897 flow [2024-06-27 20:06:16,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:16,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:16,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:16,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:06:16,437 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:16,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash -406547348, now seen corresponding path program 2 times [2024-06-27 20:06:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:16,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641185365] [2024-06-27 20:06:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:16,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:17,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641185365] [2024-06-27 20:06:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641185365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:17,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:17,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:17,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43967709] [2024-06-27 20:06:17,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:17,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:17,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:17,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 451 transitions, 4897 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:17,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:17,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:17,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:18,465 INFO L124 PetriNetUnfolderBase]: 2547/4125 cut-off events. [2024-06-27 20:06:18,465 INFO L125 PetriNetUnfolderBase]: For 837782/837788 co-relation queries the response was YES. [2024-06-27 20:06:18,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48710 conditions, 4125 events. 2547/4125 cut-off events. For 837782/837788 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24263 event pairs, 519 based on Foata normal form. 7/4131 useless extension candidates. Maximal degree in co-relation 48556. Up to 3806 conditions per place. [2024-06-27 20:06:18,532 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 439 selfloop transitions, 31 changer transitions 0/475 dead transitions. [2024-06-27 20:06:18,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 475 transitions, 6057 flow [2024-06-27 20:06:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:06:18,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:06:18,533 INFO L175 Difference]: Start difference. First operand has 337 places, 451 transitions, 4897 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:06:18,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 475 transitions, 6057 flow [2024-06-27 20:06:20,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 475 transitions, 5824 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:20,594 INFO L231 Difference]: Finished difference. Result has 339 places, 454 transitions, 4890 flow [2024-06-27 20:06:20,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4664, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4890, PETRI_PLACES=339, PETRI_TRANSITIONS=454} [2024-06-27 20:06:20,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-27 20:06:20,594 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 454 transitions, 4890 flow [2024-06-27 20:06:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:06:20,594 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:20,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash 785832060, now seen corresponding path program 7 times [2024-06-27 20:06:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784791428] [2024-06-27 20:06:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:20,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784791428] [2024-06-27 20:06:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784791428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:21,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:21,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251843788] [2024-06-27 20:06:21,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:21,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:21,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:21,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 454 transitions, 4890 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:21,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:21,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:21,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:22,866 INFO L124 PetriNetUnfolderBase]: 2557/4136 cut-off events. [2024-06-27 20:06:22,866 INFO L125 PetriNetUnfolderBase]: For 860073/860073 co-relation queries the response was YES. [2024-06-27 20:06:22,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49046 conditions, 4136 events. 2557/4136 cut-off events. For 860073/860073 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24300 event pairs, 519 based on Foata normal form. 2/4137 useless extension candidates. Maximal degree in co-relation 48891. Up to 3809 conditions per place. [2024-06-27 20:06:22,941 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 36 changer transitions 0/475 dead transitions. [2024-06-27 20:06:22,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 475 transitions, 6146 flow [2024-06-27 20:06:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:06:22,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:06:22,943 INFO L175 Difference]: Start difference. First operand has 339 places, 454 transitions, 4890 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:06:22,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 475 transitions, 6146 flow [2024-06-27 20:06:25,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 475 transitions, 5942 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:25,276 INFO L231 Difference]: Finished difference. Result has 341 places, 458 transitions, 4997 flow [2024-06-27 20:06:25,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4686, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4997, PETRI_PLACES=341, PETRI_TRANSITIONS=458} [2024-06-27 20:06:25,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-27 20:06:25,276 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 458 transitions, 4997 flow [2024-06-27 20:06:25,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:25,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:25,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:25,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:06:25,277 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:25,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:25,277 INFO L85 PathProgramCache]: Analyzing trace with hash 786069210, now seen corresponding path program 8 times [2024-06-27 20:06:25,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:25,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858394246] [2024-06-27 20:06:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:25,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:26,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:26,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858394246] [2024-06-27 20:06:26,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858394246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:26,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:26,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627943692] [2024-06-27 20:06:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:26,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:26,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:26,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 458 transitions, 4997 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:26,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:26,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:26,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:27,256 INFO L124 PetriNetUnfolderBase]: 2567/4152 cut-off events. [2024-06-27 20:06:27,256 INFO L125 PetriNetUnfolderBase]: For 876696/876696 co-relation queries the response was YES. [2024-06-27 20:06:27,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49754 conditions, 4152 events. 2567/4152 cut-off events. For 876696/876696 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24368 event pairs, 519 based on Foata normal form. 1/4152 useless extension candidates. Maximal degree in co-relation 49598. Up to 3817 conditions per place. [2024-06-27 20:06:27,320 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 435 selfloop transitions, 42 changer transitions 0/482 dead transitions. [2024-06-27 20:06:27,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 482 transitions, 6220 flow [2024-06-27 20:06:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 20:06:27,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-27 20:06:27,321 INFO L175 Difference]: Start difference. First operand has 341 places, 458 transitions, 4997 flow. Second operand 10 states and 171 transitions. [2024-06-27 20:06:27,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 482 transitions, 6220 flow [2024-06-27 20:06:29,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 482 transitions, 5937 flow, removed 108 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:29,271 INFO L231 Difference]: Finished difference. Result has 345 places, 464 transitions, 4998 flow [2024-06-27 20:06:29,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4998, PETRI_PLACES=345, PETRI_TRANSITIONS=464} [2024-06-27 20:06:29,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-27 20:06:29,271 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 464 transitions, 4998 flow [2024-06-27 20:06:29,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:29,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:29,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:29,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:06:29,272 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:29,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -908612442, now seen corresponding path program 9 times [2024-06-27 20:06:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:29,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609657289] [2024-06-27 20:06:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:30,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:30,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609657289] [2024-06-27 20:06:30,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609657289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:30,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:30,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:30,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418964529] [2024-06-27 20:06:30,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:30,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:30,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:30,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:30,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:30,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:30,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 464 transitions, 4998 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:30,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:30,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:30,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:31,183 INFO L124 PetriNetUnfolderBase]: 2577/4170 cut-off events. [2024-06-27 20:06:31,183 INFO L125 PetriNetUnfolderBase]: For 900512/900514 co-relation queries the response was YES. [2024-06-27 20:06:31,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50333 conditions, 4170 events. 2577/4170 cut-off events. For 900512/900514 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24513 event pairs, 526 based on Foata normal form. 4/4173 useless extension candidates. Maximal degree in co-relation 50175. Up to 3696 conditions per place. [2024-06-27 20:06:31,246 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 409 selfloop transitions, 75 changer transitions 0/489 dead transitions. [2024-06-27 20:06:31,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 489 transitions, 6420 flow [2024-06-27 20:06:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:06:31,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:06:31,247 INFO L175 Difference]: Start difference. First operand has 345 places, 464 transitions, 4998 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:06:31,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 489 transitions, 6420 flow [2024-06-27 20:06:33,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 489 transitions, 6205 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:33,536 INFO L231 Difference]: Finished difference. Result has 347 places, 468 transitions, 5186 flow [2024-06-27 20:06:33,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5186, PETRI_PLACES=347, PETRI_TRANSITIONS=468} [2024-06-27 20:06:33,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-27 20:06:33,536 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 468 transitions, 5186 flow [2024-06-27 20:06:33,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:33,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:33,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:33,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:06:33,536 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:33,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:33,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1067261976, now seen corresponding path program 3 times [2024-06-27 20:06:33,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:33,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432949466] [2024-06-27 20:06:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:33,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:34,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:34,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432949466] [2024-06-27 20:06:34,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432949466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:34,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:34,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074984889] [2024-06-27 20:06:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:34,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:34,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:34,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 468 transitions, 5186 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:34,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:34,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:34,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:35,615 INFO L124 PetriNetUnfolderBase]: 2590/4191 cut-off events. [2024-06-27 20:06:35,615 INFO L125 PetriNetUnfolderBase]: For 928111/928117 co-relation queries the response was YES. [2024-06-27 20:06:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51518 conditions, 4191 events. 2590/4191 cut-off events. For 928111/928117 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 24679 event pairs, 483 based on Foata normal form. 7/4197 useless extension candidates. Maximal degree in co-relation 51359. Up to 3822 conditions per place. [2024-06-27 20:06:35,681 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 434 selfloop transitions, 54 changer transitions 0/493 dead transitions. [2024-06-27 20:06:35,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 493 transitions, 6772 flow [2024-06-27 20:06:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:06:35,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:06:35,682 INFO L175 Difference]: Start difference. First operand has 347 places, 468 transitions, 5186 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:06:35,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 493 transitions, 6772 flow [2024-06-27 20:06:38,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 493 transitions, 6397 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:38,007 INFO L231 Difference]: Finished difference. Result has 349 places, 474 transitions, 5267 flow [2024-06-27 20:06:38,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5267, PETRI_PLACES=349, PETRI_TRANSITIONS=474} [2024-06-27 20:06:38,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-27 20:06:38,007 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 474 transitions, 5267 flow [2024-06-27 20:06:38,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:38,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:38,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:38,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:06:38,007 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:38,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:38,008 INFO L85 PathProgramCache]: Analyzing trace with hash 789562476, now seen corresponding path program 4 times [2024-06-27 20:06:38,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:38,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329787325] [2024-06-27 20:06:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:38,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329787325] [2024-06-27 20:06:38,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329787325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:38,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:38,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845550171] [2024-06-27 20:06:38,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:38,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:38,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:39,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:39,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 474 transitions, 5267 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:39,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:39,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:39,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:40,094 INFO L124 PetriNetUnfolderBase]: 2595/4200 cut-off events. [2024-06-27 20:06:40,094 INFO L125 PetriNetUnfolderBase]: For 947166/947172 co-relation queries the response was YES. [2024-06-27 20:06:40,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51743 conditions, 4200 events. 2595/4200 cut-off events. For 947166/947172 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 24754 event pairs, 519 based on Foata normal form. 7/4206 useless extension candidates. Maximal degree in co-relation 51583. Up to 3856 conditions per place. [2024-06-27 20:06:40,160 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 453 selfloop transitions, 38 changer transitions 0/496 dead transitions. [2024-06-27 20:06:40,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 496 transitions, 6489 flow [2024-06-27 20:06:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:06:40,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:06:40,161 INFO L175 Difference]: Start difference. First operand has 349 places, 474 transitions, 5267 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:06:40,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 496 transitions, 6489 flow [2024-06-27 20:06:42,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 496 transitions, 6233 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:42,681 INFO L231 Difference]: Finished difference. Result has 353 places, 477 transitions, 5273 flow [2024-06-27 20:06:42,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5037, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5273, PETRI_PLACES=353, PETRI_TRANSITIONS=477} [2024-06-27 20:06:42,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-27 20:06:42,681 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 477 transitions, 5273 flow [2024-06-27 20:06:42,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:42,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:42,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:42,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:06:42,682 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:42,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash -428138347, now seen corresponding path program 2 times [2024-06-27 20:06:42,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:42,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008736822] [2024-06-27 20:06:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:42,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:43,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:43,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008736822] [2024-06-27 20:06:43,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008736822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:43,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:43,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:43,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630912042] [2024-06-27 20:06:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:43,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:43,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:43,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:43,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:43,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 477 transitions, 5273 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:43,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:43,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:43,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:44,716 INFO L124 PetriNetUnfolderBase]: 2653/4280 cut-off events. [2024-06-27 20:06:44,716 INFO L125 PetriNetUnfolderBase]: For 1006780/1006786 co-relation queries the response was YES. [2024-06-27 20:06:44,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53892 conditions, 4280 events. 2653/4280 cut-off events. For 1006780/1006786 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 25227 event pairs, 521 based on Foata normal form. 8/4287 useless extension candidates. Maximal degree in co-relation 53730. Up to 3864 conditions per place. [2024-06-27 20:06:44,775 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 448 selfloop transitions, 61 changer transitions 0/514 dead transitions. [2024-06-27 20:06:44,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 514 transitions, 7311 flow [2024-06-27 20:06:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:06:44,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 20:06:44,776 INFO L175 Difference]: Start difference. First operand has 353 places, 477 transitions, 5273 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:06:44,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 514 transitions, 7311 flow [2024-06-27 20:06:47,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 514 transitions, 7103 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:47,324 INFO L231 Difference]: Finished difference. Result has 356 places, 490 transitions, 5692 flow [2024-06-27 20:06:47,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5065, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5692, PETRI_PLACES=356, PETRI_TRANSITIONS=490} [2024-06-27 20:06:47,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-27 20:06:47,324 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 490 transitions, 5692 flow [2024-06-27 20:06:47,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:47,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:47,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:47,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:06:47,325 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:47,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:47,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1059910140, now seen corresponding path program 10 times [2024-06-27 20:06:47,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:47,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464418742] [2024-06-27 20:06:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:47,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:48,113 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 20:06:48,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:48,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464418742] [2024-06-27 20:06:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464418742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:48,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:48,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:48,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944005455] [2024-06-27 20:06:48,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:48,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:48,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:48,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:48,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:48,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 490 transitions, 5692 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:48,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:48,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:48,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:49,330 INFO L124 PetriNetUnfolderBase]: 2663/4297 cut-off events. [2024-06-27 20:06:49,330 INFO L125 PetriNetUnfolderBase]: For 1035458/1035460 co-relation queries the response was YES. [2024-06-27 20:06:49,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54902 conditions, 4297 events. 2663/4297 cut-off events. For 1035458/1035460 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 25343 event pairs, 528 based on Foata normal form. 4/4300 useless extension candidates. Maximal degree in co-relation 54738. Up to 3791 conditions per place. [2024-06-27 20:06:49,394 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 419 selfloop transitions, 90 changer transitions 0/514 dead transitions. [2024-06-27 20:06:49,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 514 transitions, 7136 flow [2024-06-27 20:06:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:06:49,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:06:49,395 INFO L175 Difference]: Start difference. First operand has 356 places, 490 transitions, 5692 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:06:49,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 514 transitions, 7136 flow [2024-06-27 20:06:51,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 514 transitions, 6928 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:51,821 INFO L231 Difference]: Finished difference. Result has 361 places, 494 transitions, 5933 flow [2024-06-27 20:06:51,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5933, PETRI_PLACES=361, PETRI_TRANSITIONS=494} [2024-06-27 20:06:51,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-27 20:06:51,822 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 494 transitions, 5933 flow [2024-06-27 20:06:51,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:51,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:51,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:51,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:06:51,822 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:51,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 796913940, now seen corresponding path program 11 times [2024-06-27 20:06:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:51,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112996190] [2024-06-27 20:06:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:51,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:52,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112996190] [2024-06-27 20:06:52,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112996190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:52,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:52,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:52,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810281730] [2024-06-27 20:06:52,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:52,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:52,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:52,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:52,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:52,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 494 transitions, 5933 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:52,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:52,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:52,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:53,896 INFO L124 PetriNetUnfolderBase]: 2692/4339 cut-off events. [2024-06-27 20:06:53,896 INFO L125 PetriNetUnfolderBase]: For 1077326/1077328 co-relation queries the response was YES. [2024-06-27 20:06:53,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56752 conditions, 4339 events. 2692/4339 cut-off events. For 1077326/1077328 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 25659 event pairs, 492 based on Foata normal form. 3/4341 useless extension candidates. Maximal degree in co-relation 56586. Up to 3751 conditions per place. [2024-06-27 20:06:53,964 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 381 selfloop transitions, 138 changer transitions 0/524 dead transitions. [2024-06-27 20:06:53,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 524 transitions, 8115 flow [2024-06-27 20:06:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:06:53,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:06:53,966 INFO L175 Difference]: Start difference. First operand has 361 places, 494 transitions, 5933 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:06:53,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 524 transitions, 8115 flow [2024-06-27 20:06:56,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 524 transitions, 7694 flow, removed 123 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:56,903 INFO L231 Difference]: Finished difference. Result has 364 places, 505 transitions, 6518 flow [2024-06-27 20:06:56,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5512, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6518, PETRI_PLACES=364, PETRI_TRANSITIONS=505} [2024-06-27 20:06:56,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-27 20:06:56,903 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 505 transitions, 6518 flow [2024-06-27 20:06:56,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:56,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:56,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:56,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:06:56,903 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:56,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash 789562693, now seen corresponding path program 3 times [2024-06-27 20:06:56,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:56,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126056578] [2024-06-27 20:06:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:56,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:57,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:57,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126056578] [2024-06-27 20:06:57,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126056578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:57,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:57,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:57,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967453940] [2024-06-27 20:06:57,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:57,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:57,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:57,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 505 transitions, 6518 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:57,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:57,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:57,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:58,972 INFO L124 PetriNetUnfolderBase]: 2712/4368 cut-off events. [2024-06-27 20:06:58,972 INFO L125 PetriNetUnfolderBase]: For 1123813/1123819 co-relation queries the response was YES. [2024-06-27 20:06:59,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57883 conditions, 4368 events. 2712/4368 cut-off events. For 1123813/1123819 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 25789 event pairs, 485 based on Foata normal form. 10/4377 useless extension candidates. Maximal degree in co-relation 57715. Up to 4009 conditions per place. [2024-06-27 20:06:59,041 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 485 selfloop transitions, 39 changer transitions 0/529 dead transitions. [2024-06-27 20:06:59,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 529 transitions, 7836 flow [2024-06-27 20:06:59,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:06:59,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 20:06:59,042 INFO L175 Difference]: Start difference. First operand has 364 places, 505 transitions, 6518 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:06:59,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 529 transitions, 7836 flow [2024-06-27 20:07:01,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 529 transitions, 7445 flow, removed 166 selfloop flow, removed 4 redundant places. [2024-06-27 20:07:01,931 INFO L231 Difference]: Finished difference. Result has 369 places, 509 transitions, 6406 flow [2024-06-27 20:07:01,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6406, PETRI_PLACES=369, PETRI_TRANSITIONS=509} [2024-06-27 20:07:01,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-27 20:07:01,931 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 509 transitions, 6406 flow [2024-06-27 20:07:01,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:01,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:01,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:07:01,932 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:01,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1628423278, now seen corresponding path program 12 times [2024-06-27 20:07:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:01,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325791360] [2024-06-27 20:07:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:02,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:02,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325791360] [2024-06-27 20:07:02,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325791360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:02,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:02,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932441022] [2024-06-27 20:07:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:02,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:02,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:02,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:02,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:02,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 509 transitions, 6406 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:02,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:02,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:02,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:04,052 INFO L124 PetriNetUnfolderBase]: 2709/4361 cut-off events. [2024-06-27 20:07:04,052 INFO L125 PetriNetUnfolderBase]: For 1097416/1097416 co-relation queries the response was YES. [2024-06-27 20:07:04,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56869 conditions, 4361 events. 2709/4361 cut-off events. For 1097416/1097416 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25744 event pairs, 521 based on Foata normal form. 1/4361 useless extension candidates. Maximal degree in co-relation 56700. Up to 4017 conditions per place. [2024-06-27 20:07:04,121 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 43 changer transitions 0/525 dead transitions. [2024-06-27 20:07:04,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 525 transitions, 7490 flow [2024-06-27 20:07:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:07:04,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:07:04,122 INFO L175 Difference]: Start difference. First operand has 369 places, 509 transitions, 6406 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:07:04,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 525 transitions, 7490 flow [2024-06-27 20:07:07,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 525 transitions, 7143 flow, removed 137 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:07,968 INFO L231 Difference]: Finished difference. Result has 371 places, 509 transitions, 6151 flow [2024-06-27 20:07:07,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6059, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6151, PETRI_PLACES=371, PETRI_TRANSITIONS=509} [2024-06-27 20:07:07,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-27 20:07:07,969 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 509 transitions, 6151 flow [2024-06-27 20:07:07,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:07,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:07,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:07,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:07:07,969 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:07,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:07,970 INFO L85 PathProgramCache]: Analyzing trace with hash 797181253, now seen corresponding path program 4 times [2024-06-27 20:07:07,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:07,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33200252] [2024-06-27 20:07:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:07,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:08,744 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 20:07:08,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:08,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33200252] [2024-06-27 20:07:08,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33200252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:08,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:08,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:08,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411382069] [2024-06-27 20:07:08,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:08,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:08,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:08,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:08,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 509 transitions, 6151 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:08,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:08,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:08,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:10,119 INFO L124 PetriNetUnfolderBase]: 2703/4356 cut-off events. [2024-06-27 20:07:10,120 INFO L125 PetriNetUnfolderBase]: For 1098834/1098840 co-relation queries the response was YES. [2024-06-27 20:07:10,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56159 conditions, 4356 events. 2703/4356 cut-off events. For 1098834/1098840 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25685 event pairs, 521 based on Foata normal form. 8/4363 useless extension candidates. Maximal degree in co-relation 55989. Up to 3929 conditions per place. [2024-06-27 20:07:10,185 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 458 selfloop transitions, 68 changer transitions 0/531 dead transitions. [2024-06-27 20:07:10,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 531 transitions, 7536 flow [2024-06-27 20:07:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:07:10,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:07:10,186 INFO L175 Difference]: Start difference. First operand has 371 places, 509 transitions, 6151 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:07:10,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 531 transitions, 7536 flow [2024-06-27 20:07:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 531 transitions, 7307 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-27 20:07:13,104 INFO L231 Difference]: Finished difference. Result has 372 places, 509 transitions, 6065 flow [2024-06-27 20:07:13,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6065, PETRI_PLACES=372, PETRI_TRANSITIONS=509} [2024-06-27 20:07:13,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-27 20:07:13,104 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 509 transitions, 6065 flow [2024-06-27 20:07:13,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:13,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:13,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:13,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:07:13,105 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:13,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash 216469886, now seen corresponding path program 1 times [2024-06-27 20:07:13,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:13,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261066262] [2024-06-27 20:07:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:13,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:13,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:13,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261066262] [2024-06-27 20:07:13,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261066262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:13,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:13,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:13,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236996753] [2024-06-27 20:07:13,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:13,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:13,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:13,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 509 transitions, 6065 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:13,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:13,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:13,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:15,160 INFO L124 PetriNetUnfolderBase]: 2711/4367 cut-off events. [2024-06-27 20:07:15,160 INFO L125 PetriNetUnfolderBase]: For 1113981/1113985 co-relation queries the response was YES. [2024-06-27 20:07:15,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56393 conditions, 4367 events. 2711/4367 cut-off events. For 1113981/1113985 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 25750 event pairs, 409 based on Foata normal form. 6/4372 useless extension candidates. Maximal degree in co-relation 56223. Up to 3993 conditions per place. [2024-06-27 20:07:15,237 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 505 selfloop transitions, 29 changer transitions 0/539 dead transitions. [2024-06-27 20:07:15,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 539 transitions, 7295 flow [2024-06-27 20:07:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:07:15,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:07:15,238 INFO L175 Difference]: Start difference. First operand has 372 places, 509 transitions, 6065 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:07:15,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 539 transitions, 7295 flow [2024-06-27 20:07:18,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 539 transitions, 7156 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:18,470 INFO L231 Difference]: Finished difference. Result has 374 places, 511 transitions, 6073 flow [2024-06-27 20:07:18,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6073, PETRI_PLACES=374, PETRI_TRANSITIONS=511} [2024-06-27 20:07:18,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-27 20:07:18,470 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 511 transitions, 6073 flow [2024-06-27 20:07:18,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:18,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:18,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:18,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:07:18,471 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:18,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 578078032, now seen corresponding path program 2 times [2024-06-27 20:07:18,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:18,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62381602] [2024-06-27 20:07:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:18,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:19,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:19,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62381602] [2024-06-27 20:07:19,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62381602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:19,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:19,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997533372] [2024-06-27 20:07:19,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:19,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:19,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:19,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:19,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 511 transitions, 6073 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:19,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:19,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:19,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:20,504 INFO L124 PetriNetUnfolderBase]: 2719/4379 cut-off events. [2024-06-27 20:07:20,504 INFO L125 PetriNetUnfolderBase]: For 1128477/1128481 co-relation queries the response was YES. [2024-06-27 20:07:20,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56630 conditions, 4379 events. 2719/4379 cut-off events. For 1128477/1128481 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 25852 event pairs, 515 based on Foata normal form. 6/4384 useless extension candidates. Maximal degree in co-relation 56459. Up to 4042 conditions per place. [2024-06-27 20:07:20,566 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 502 selfloop transitions, 30 changer transitions 0/537 dead transitions. [2024-06-27 20:07:20,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 537 transitions, 7291 flow [2024-06-27 20:07:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:07:20,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:07:20,567 INFO L175 Difference]: Start difference. First operand has 374 places, 511 transitions, 6073 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:07:20,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 537 transitions, 7291 flow [2024-06-27 20:07:24,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 537 transitions, 7160 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:24,152 INFO L231 Difference]: Finished difference. Result has 376 places, 513 transitions, 6095 flow [2024-06-27 20:07:24,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6095, PETRI_PLACES=376, PETRI_TRANSITIONS=513} [2024-06-27 20:07:24,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-27 20:07:24,153 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 513 transitions, 6095 flow [2024-06-27 20:07:24,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:24,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:24,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:24,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:07:24,153 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:24,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash 482176466, now seen corresponding path program 3 times [2024-06-27 20:07:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:24,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260929739] [2024-06-27 20:07:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:24,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260929739] [2024-06-27 20:07:24,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260929739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:24,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:24,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895782666] [2024-06-27 20:07:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:24,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:24,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:25,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:25,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 513 transitions, 6095 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:25,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:25,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:25,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:26,231 INFO L124 PetriNetUnfolderBase]: 2727/4391 cut-off events. [2024-06-27 20:07:26,231 INFO L125 PetriNetUnfolderBase]: For 1146632/1146636 co-relation queries the response was YES. [2024-06-27 20:07:26,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56913 conditions, 4391 events. 2727/4391 cut-off events. For 1146632/1146636 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 25943 event pairs, 517 based on Foata normal form. 6/4396 useless extension candidates. Maximal degree in co-relation 56741. Up to 4059 conditions per place. [2024-06-27 20:07:26,296 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 502 selfloop transitions, 31 changer transitions 0/538 dead transitions. [2024-06-27 20:07:26,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 538 transitions, 7317 flow [2024-06-27 20:07:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:07:26,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:07:26,297 INFO L175 Difference]: Start difference. First operand has 376 places, 513 transitions, 6095 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:07:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 538 transitions, 7317 flow [2024-06-27 20:07:30,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 538 transitions, 7180 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:30,177 INFO L231 Difference]: Finished difference. Result has 378 places, 515 transitions, 6117 flow [2024-06-27 20:07:30,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5958, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6117, PETRI_PLACES=378, PETRI_TRANSITIONS=515} [2024-06-27 20:07:30,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 20:07:30,178 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 515 transitions, 6117 flow [2024-06-27 20:07:30,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:30,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:30,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:30,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:07:30,178 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:30,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:30,179 INFO L85 PathProgramCache]: Analyzing trace with hash 796790994, now seen corresponding path program 4 times [2024-06-27 20:07:30,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:30,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842094011] [2024-06-27 20:07:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:30,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:31,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:31,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842094011] [2024-06-27 20:07:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842094011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:31,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:31,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:31,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119278232] [2024-06-27 20:07:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:31,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:31,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:31,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 515 transitions, 6117 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:31,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:31,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:31,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:32,347 INFO L124 PetriNetUnfolderBase]: 2735/4401 cut-off events. [2024-06-27 20:07:32,347 INFO L125 PetriNetUnfolderBase]: For 1161823/1161823 co-relation queries the response was YES. [2024-06-27 20:07:32,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57200 conditions, 4401 events. 2735/4401 cut-off events. For 1161823/1161823 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 25993 event pairs, 521 based on Foata normal form. 2/4402 useless extension candidates. Maximal degree in co-relation 57027. Up to 4054 conditions per place. [2024-06-27 20:07:32,415 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 487 selfloop transitions, 42 changer transitions 0/534 dead transitions. [2024-06-27 20:07:32,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 534 transitions, 7313 flow [2024-06-27 20:07:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:07:32,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:07:32,416 INFO L175 Difference]: Start difference. First operand has 378 places, 515 transitions, 6117 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:07:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 534 transitions, 7313 flow [2024-06-27 20:07:35,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 534 transitions, 7160 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:35,966 INFO L231 Difference]: Finished difference. Result has 380 places, 517 transitions, 6149 flow [2024-06-27 20:07:35,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5964, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6149, PETRI_PLACES=380, PETRI_TRANSITIONS=517} [2024-06-27 20:07:35,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-27 20:07:35,967 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 517 transitions, 6149 flow [2024-06-27 20:07:35,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:35,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:35,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:35,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:07:35,967 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:35,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash 785749104, now seen corresponding path program 5 times [2024-06-27 20:07:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:35,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415329129] [2024-06-27 20:07:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:36,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:36,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415329129] [2024-06-27 20:07:36,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415329129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:36,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:36,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:36,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71712929] [2024-06-27 20:07:36,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:36,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:36,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:36,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:36,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 517 transitions, 6149 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:36,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:36,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:36,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:38,087 INFO L124 PetriNetUnfolderBase]: 2743/4413 cut-off events. [2024-06-27 20:07:38,087 INFO L125 PetriNetUnfolderBase]: For 1177097/1177097 co-relation queries the response was YES. [2024-06-27 20:07:38,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57495 conditions, 4413 events. 2743/4413 cut-off events. For 1177097/1177097 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 26062 event pairs, 523 based on Foata normal form. 2/4414 useless extension candidates. Maximal degree in co-relation 57321. Up to 4075 conditions per place. [2024-06-27 20:07:38,160 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 497 selfloop transitions, 34 changer transitions 0/536 dead transitions. [2024-06-27 20:07:38,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 536 transitions, 7353 flow [2024-06-27 20:07:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:07:38,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 20:07:38,161 INFO L175 Difference]: Start difference. First operand has 380 places, 517 transitions, 6149 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:07:38,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 536 transitions, 7353 flow [2024-06-27 20:07:41,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 536 transitions, 7184 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:41,819 INFO L231 Difference]: Finished difference. Result has 382 places, 519 transitions, 6153 flow [2024-06-27 20:07:41,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5980, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6153, PETRI_PLACES=382, PETRI_TRANSITIONS=519} [2024-06-27 20:07:41,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-27 20:07:41,820 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 519 transitions, 6153 flow [2024-06-27 20:07:41,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:41,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:41,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:07:41,820 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:41,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash -439312886, now seen corresponding path program 6 times [2024-06-27 20:07:41,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:41,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334158099] [2024-06-27 20:07:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:41,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:42,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334158099] [2024-06-27 20:07:42,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334158099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:42,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:42,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256178287] [2024-06-27 20:07:42,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:42,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:42,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:42,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 519 transitions, 6153 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:42,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:42,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:42,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:43,847 INFO L124 PetriNetUnfolderBase]: 2751/4425 cut-off events. [2024-06-27 20:07:43,847 INFO L125 PetriNetUnfolderBase]: For 1192720/1192720 co-relation queries the response was YES. [2024-06-27 20:07:43,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57768 conditions, 4425 events. 2751/4425 cut-off events. For 1192720/1192720 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26119 event pairs, 521 based on Foata normal form. 2/4426 useless extension candidates. Maximal degree in co-relation 57593. Up to 4082 conditions per place. [2024-06-27 20:07:43,916 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 501 selfloop transitions, 33 changer transitions 0/539 dead transitions. [2024-06-27 20:07:43,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 539 transitions, 7369 flow [2024-06-27 20:07:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:07:43,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 20:07:43,917 INFO L175 Difference]: Start difference. First operand has 382 places, 519 transitions, 6153 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:07:43,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 539 transitions, 7369 flow [2024-06-27 20:07:47,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 539 transitions, 7207 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:47,609 INFO L231 Difference]: Finished difference. Result has 384 places, 521 transitions, 6166 flow [2024-06-27 20:07:47,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5991, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6166, PETRI_PLACES=384, PETRI_TRANSITIONS=521} [2024-06-27 20:07:47,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-27 20:07:47,610 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 521 transitions, 6166 flow [2024-06-27 20:07:47,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:47,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:47,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:47,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:07:47,610 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:47,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:47,610 INFO L85 PathProgramCache]: Analyzing trace with hash 797191173, now seen corresponding path program 1 times [2024-06-27 20:07:47,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:47,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233718568] [2024-06-27 20:07:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:47,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:48,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233718568] [2024-06-27 20:07:48,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233718568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:48,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:48,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:07:48,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924483915] [2024-06-27 20:07:48,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:48,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:07:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:07:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:07:49,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:07:49,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 521 transitions, 6166 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:49,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:49,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:07:49,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:50,182 INFO L124 PetriNetUnfolderBase]: 2640/4302 cut-off events. [2024-06-27 20:07:50,182 INFO L125 PetriNetUnfolderBase]: For 1300476/1300548 co-relation queries the response was YES. [2024-06-27 20:07:50,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57760 conditions, 4302 events. 2640/4302 cut-off events. For 1300476/1300548 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 25883 event pairs, 502 based on Foata normal form. 20/4296 useless extension candidates. Maximal degree in co-relation 57584. Up to 3706 conditions per place. [2024-06-27 20:07:50,256 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 440 selfloop transitions, 49 changer transitions 0/544 dead transitions. [2024-06-27 20:07:50,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 544 transitions, 7354 flow [2024-06-27 20:07:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:07:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:07:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:07:50,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-27 20:07:50,257 INFO L175 Difference]: Start difference. First operand has 384 places, 521 transitions, 6166 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:07:50,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 544 transitions, 7354 flow [2024-06-27 20:07:53,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 544 transitions, 7195 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:53,816 INFO L231 Difference]: Finished difference. Result has 387 places, 522 transitions, 6168 flow [2024-06-27 20:07:53,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6168, PETRI_PLACES=387, PETRI_TRANSITIONS=522} [2024-06-27 20:07:53,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-27 20:07:53,816 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 522 transitions, 6168 flow [2024-06-27 20:07:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:53,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:53,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:53,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:07:53,817 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:53,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 896351430, now seen corresponding path program 5 times [2024-06-27 20:07:53,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:53,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869386435] [2024-06-27 20:07:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:54,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869386435] [2024-06-27 20:07:54,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869386435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:54,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:54,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570052262] [2024-06-27 20:07:54,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:54,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:54,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:54,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:07:54,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 522 transitions, 6168 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:54,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:54,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:07:54,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:55,844 INFO L124 PetriNetUnfolderBase]: 2800/4503 cut-off events. [2024-06-27 20:07:55,844 INFO L125 PetriNetUnfolderBase]: For 1228174/1228174 co-relation queries the response was YES. [2024-06-27 20:07:55,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59174 conditions, 4503 events. 2800/4503 cut-off events. For 1228174/1228174 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 26667 event pairs, 543 based on Foata normal form. 1/4503 useless extension candidates. Maximal degree in co-relation 58997. Up to 4015 conditions per place. [2024-06-27 20:07:55,920 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 66 changer transitions 0/548 dead transitions. [2024-06-27 20:07:55,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 548 transitions, 7552 flow [2024-06-27 20:07:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:07:55,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:07:55,921 INFO L175 Difference]: Start difference. First operand has 387 places, 522 transitions, 6168 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:07:55,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 548 transitions, 7552 flow [2024-06-27 20:07:59,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 548 transitions, 7431 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:07:59,817 INFO L231 Difference]: Finished difference. Result has 388 places, 525 transitions, 6421 flow [2024-06-27 20:07:59,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6421, PETRI_PLACES=388, PETRI_TRANSITIONS=525} [2024-06-27 20:07:59,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-27 20:07:59,818 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 525 transitions, 6421 flow [2024-06-27 20:07:59,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:59,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:59,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:59,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:07:59,818 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:59,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash -601539792, now seen corresponding path program 6 times [2024-06-27 20:07:59,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:59,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262608665] [2024-06-27 20:07:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:59,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:00,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262608665] [2024-06-27 20:08:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262608665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:00,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:00,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:00,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103123845] [2024-06-27 20:08:00,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:00,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:00,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:00,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:00,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 525 transitions, 6421 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:00,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:00,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:00,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:01,934 INFO L124 PetriNetUnfolderBase]: 2805/4513 cut-off events. [2024-06-27 20:08:01,934 INFO L125 PetriNetUnfolderBase]: For 1252050/1252050 co-relation queries the response was YES. [2024-06-27 20:08:01,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59682 conditions, 4513 events. 2805/4513 cut-off events. For 1252050/1252050 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 26842 event pairs, 507 based on Foata normal form. 1/4513 useless extension candidates. Maximal degree in co-relation 59504. Up to 4016 conditions per place. [2024-06-27 20:08:02,007 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 472 selfloop transitions, 71 changer transitions 0/548 dead transitions. [2024-06-27 20:08:02,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 548 transitions, 7801 flow [2024-06-27 20:08:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:08:02,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:08:02,008 INFO L175 Difference]: Start difference. First operand has 388 places, 525 transitions, 6421 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:08:02,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 548 transitions, 7801 flow [2024-06-27 20:08:05,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 548 transitions, 7447 flow, removed 112 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:05,742 INFO L231 Difference]: Finished difference. Result has 390 places, 528 transitions, 6457 flow [2024-06-27 20:08:05,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6457, PETRI_PLACES=390, PETRI_TRANSITIONS=528} [2024-06-27 20:08:05,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-27 20:08:05,743 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 528 transitions, 6457 flow [2024-06-27 20:08:05,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:05,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:05,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:05,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:08:05,743 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:05,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 770001892, now seen corresponding path program 5 times [2024-06-27 20:08:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:05,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873908928] [2024-06-27 20:08:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:06,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:06,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873908928] [2024-06-27 20:08:06,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873908928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:06,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:06,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:06,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083047317] [2024-06-27 20:08:06,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:06,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:06,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:06,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:06,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 528 transitions, 6457 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:06,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:06,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:06,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:07,887 INFO L124 PetriNetUnfolderBase]: 2810/4522 cut-off events. [2024-06-27 20:08:07,887 INFO L125 PetriNetUnfolderBase]: For 1277189/1277195 co-relation queries the response was YES. [2024-06-27 20:08:07,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60171 conditions, 4522 events. 2810/4522 cut-off events. For 1277189/1277195 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26862 event pairs, 534 based on Foata normal form. 7/4528 useless extension candidates. Maximal degree in co-relation 59992. Up to 4157 conditions per place. [2024-06-27 20:08:07,961 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 510 selfloop transitions, 37 changer transitions 0/552 dead transitions. [2024-06-27 20:08:07,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 552 transitions, 7815 flow [2024-06-27 20:08:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:08:07,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:08:07,962 INFO L175 Difference]: Start difference. First operand has 390 places, 528 transitions, 6457 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:08:07,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 552 transitions, 7815 flow [2024-06-27 20:08:11,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 552 transitions, 7447 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:11,581 INFO L231 Difference]: Finished difference. Result has 392 places, 531 transitions, 6375 flow [2024-06-27 20:08:11,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6375, PETRI_PLACES=392, PETRI_TRANSITIONS=531} [2024-06-27 20:08:11,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-27 20:08:11,582 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 531 transitions, 6375 flow [2024-06-27 20:08:11,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:11,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:11,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:11,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:08:11,582 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:11,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:11,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1124680642, now seen corresponding path program 6 times [2024-06-27 20:08:11,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:11,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985770776] [2024-06-27 20:08:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:11,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:12,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:12,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985770776] [2024-06-27 20:08:12,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985770776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:12,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:12,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:12,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150191502] [2024-06-27 20:08:12,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:12,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:12,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:12,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 531 transitions, 6375 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:12,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:12,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:12,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:13,752 INFO L124 PetriNetUnfolderBase]: 2823/4540 cut-off events. [2024-06-27 20:08:13,752 INFO L125 PetriNetUnfolderBase]: For 1310481/1310487 co-relation queries the response was YES. [2024-06-27 20:08:13,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60922 conditions, 4540 events. 2823/4540 cut-off events. For 1310481/1310487 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 26981 event pairs, 534 based on Foata normal form. 7/4546 useless extension candidates. Maximal degree in co-relation 60742. Up to 4148 conditions per place. [2024-06-27 20:08:13,825 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 58 changer transitions 0/558 dead transitions. [2024-06-27 20:08:13,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 558 transitions, 8207 flow [2024-06-27 20:08:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:08:13,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:08:13,826 INFO L175 Difference]: Start difference. First operand has 392 places, 531 transitions, 6375 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:08:13,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 558 transitions, 8207 flow [2024-06-27 20:08:17,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 558 transitions, 7943 flow, removed 97 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:17,697 INFO L231 Difference]: Finished difference. Result has 395 places, 539 transitions, 6679 flow [2024-06-27 20:08:17,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6679, PETRI_PLACES=395, PETRI_TRANSITIONS=539} [2024-06-27 20:08:17,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-27 20:08:17,698 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 539 transitions, 6679 flow [2024-06-27 20:08:17,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:17,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:17,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:17,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:08:17,699 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:17,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:17,699 INFO L85 PathProgramCache]: Analyzing trace with hash 323506616, now seen corresponding path program 7 times [2024-06-27 20:08:17,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:17,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861014869] [2024-06-27 20:08:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:17,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:18,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:18,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861014869] [2024-06-27 20:08:18,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861014869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:18,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:18,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:18,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697547752] [2024-06-27 20:08:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:18,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:18,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:18,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:18,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:18,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 539 transitions, 6679 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:18,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:18,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:18,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:19,764 INFO L124 PetriNetUnfolderBase]: 2828/4545 cut-off events. [2024-06-27 20:08:19,764 INFO L125 PetriNetUnfolderBase]: For 1337173/1337173 co-relation queries the response was YES. [2024-06-27 20:08:19,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61503 conditions, 4545 events. 2828/4545 cut-off events. For 1337173/1337173 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 26990 event pairs, 543 based on Foata normal form. 1/4545 useless extension candidates. Maximal degree in co-relation 61321. Up to 4013 conditions per place. [2024-06-27 20:08:19,845 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 461 selfloop transitions, 97 changer transitions 0/563 dead transitions. [2024-06-27 20:08:19,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 563 transitions, 8589 flow [2024-06-27 20:08:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:08:19,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:08:19,846 INFO L175 Difference]: Start difference. First operand has 395 places, 539 transitions, 6679 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:08:19,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 563 transitions, 8589 flow [2024-06-27 20:08:24,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 563 transitions, 8286 flow, removed 124 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:24,506 INFO L231 Difference]: Finished difference. Result has 399 places, 545 transitions, 7074 flow [2024-06-27 20:08:24,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7074, PETRI_PLACES=399, PETRI_TRANSITIONS=545} [2024-06-27 20:08:24,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-27 20:08:24,506 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 545 transitions, 7074 flow [2024-06-27 20:08:24,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:24,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:24,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:24,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:08:24,507 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:24,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash -648224406, now seen corresponding path program 7 times [2024-06-27 20:08:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:24,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369936442] [2024-06-27 20:08:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:25,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369936442] [2024-06-27 20:08:25,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369936442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:25,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:25,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:25,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562551027] [2024-06-27 20:08:25,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:25,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:25,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:25,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:25,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:25,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 545 transitions, 7074 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:25,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:25,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:25,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:26,753 INFO L124 PetriNetUnfolderBase]: 2833/4554 cut-off events. [2024-06-27 20:08:26,753 INFO L125 PetriNetUnfolderBase]: For 1360436/1360442 co-relation queries the response was YES. [2024-06-27 20:08:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62158 conditions, 4554 events. 2833/4554 cut-off events. For 1360436/1360442 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27016 event pairs, 534 based on Foata normal form. 7/4560 useless extension candidates. Maximal degree in co-relation 61974. Up to 4177 conditions per place. [2024-06-27 20:08:26,822 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 48 changer transitions 0/566 dead transitions. [2024-06-27 20:08:26,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 566 transitions, 8417 flow [2024-06-27 20:08:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:08:26,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:08:26,823 INFO L175 Difference]: Start difference. First operand has 399 places, 545 transitions, 7074 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:08:26,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 566 transitions, 8417 flow [2024-06-27 20:08:30,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 566 transitions, 8061 flow, removed 139 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:30,268 INFO L231 Difference]: Finished difference. Result has 403 places, 548 transitions, 6993 flow [2024-06-27 20:08:30,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6718, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6993, PETRI_PLACES=403, PETRI_TRANSITIONS=548} [2024-06-27 20:08:30,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-27 20:08:30,269 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 548 transitions, 6993 flow [2024-06-27 20:08:30,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:30,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:30,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:30,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:08:30,269 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:30,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1488581608, now seen corresponding path program 8 times [2024-06-27 20:08:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:30,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998910984] [2024-06-27 20:08:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:31,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:31,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998910984] [2024-06-27 20:08:31,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998910984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:31,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:31,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:31,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454030779] [2024-06-27 20:08:31,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:31,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:31,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:31,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:31,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 548 transitions, 6993 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:31,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:31,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:31,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:32,667 INFO L124 PetriNetUnfolderBase]: 2849/4580 cut-off events. [2024-06-27 20:08:32,667 INFO L125 PetriNetUnfolderBase]: For 1373279/1373279 co-relation queries the response was YES. [2024-06-27 20:08:32,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62406 conditions, 4580 events. 2849/4580 cut-off events. For 1373279/1373279 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 27223 event pairs, 543 based on Foata normal form. 1/4580 useless extension candidates. Maximal degree in co-relation 62220. Up to 4080 conditions per place. [2024-06-27 20:08:32,744 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 67 changer transitions 0/577 dead transitions. [2024-06-27 20:08:32,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 577 transitions, 8448 flow [2024-06-27 20:08:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:08:32,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 20:08:32,745 INFO L175 Difference]: Start difference. First operand has 403 places, 548 transitions, 6993 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:08:32,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 577 transitions, 8448 flow [2024-06-27 20:08:36,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 577 transitions, 8204 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:36,735 INFO L231 Difference]: Finished difference. Result has 405 places, 554 transitions, 7138 flow [2024-06-27 20:08:36,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7138, PETRI_PLACES=405, PETRI_TRANSITIONS=554} [2024-06-27 20:08:36,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-27 20:08:36,736 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 554 transitions, 7138 flow [2024-06-27 20:08:36,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:36,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:36,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:36,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:08:36,736 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:36,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:36,737 INFO L85 PathProgramCache]: Analyzing trace with hash -801019956, now seen corresponding path program 13 times [2024-06-27 20:08:36,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:36,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839841741] [2024-06-27 20:08:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:37,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:37,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839841741] [2024-06-27 20:08:37,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839841741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:37,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:37,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:37,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289854976] [2024-06-27 20:08:37,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:37,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:37,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:37,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:37,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:37,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:37,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 554 transitions, 7138 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:37,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:37,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:37,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:38,816 INFO L124 PetriNetUnfolderBase]: 2859/4598 cut-off events. [2024-06-27 20:08:38,816 INFO L125 PetriNetUnfolderBase]: For 1400651/1400651 co-relation queries the response was YES. [2024-06-27 20:08:38,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62879 conditions, 4598 events. 2859/4598 cut-off events. For 1400651/1400651 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 27375 event pairs, 543 based on Foata normal form. 2/4599 useless extension candidates. Maximal degree in co-relation 62692. Up to 4184 conditions per place. [2024-06-27 20:08:38,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 530 selfloop transitions, 44 changer transitions 0/579 dead transitions. [2024-06-27 20:08:38,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 579 transitions, 8596 flow [2024-06-27 20:08:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:08:38,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:08:38,895 INFO L175 Difference]: Start difference. First operand has 405 places, 554 transitions, 7138 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:08:38,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 579 transitions, 8596 flow [2024-06-27 20:08:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 579 transitions, 8266 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:42,841 INFO L231 Difference]: Finished difference. Result has 408 places, 558 transitions, 7155 flow [2024-06-27 20:08:42,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6808, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7155, PETRI_PLACES=408, PETRI_TRANSITIONS=558} [2024-06-27 20:08:42,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-27 20:08:42,841 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 558 transitions, 7155 flow [2024-06-27 20:08:42,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:42,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:42,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:42,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:08:42,842 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:42,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1493943988, now seen corresponding path program 9 times [2024-06-27 20:08:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:42,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946563134] [2024-06-27 20:08:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:42,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:43,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946563134] [2024-06-27 20:08:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946563134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:43,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:43,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:43,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929817207] [2024-06-27 20:08:43,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:43,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:43,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 558 transitions, 7155 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:43,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:43,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:43,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:44,975 INFO L124 PetriNetUnfolderBase]: 2864/4607 cut-off events. [2024-06-27 20:08:44,975 INFO L125 PetriNetUnfolderBase]: For 1408841/1408841 co-relation queries the response was YES. [2024-06-27 20:08:45,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62996 conditions, 4607 events. 2864/4607 cut-off events. For 1408841/1408841 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 27444 event pairs, 543 based on Foata normal form. 1/4607 useless extension candidates. Maximal degree in co-relation 62808. Up to 4101 conditions per place. [2024-06-27 20:08:45,059 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 66 changer transitions 0/584 dead transitions. [2024-06-27 20:08:45,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 584 transitions, 8601 flow [2024-06-27 20:08:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:08:45,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 20:08:45,060 INFO L175 Difference]: Start difference. First operand has 408 places, 558 transitions, 7155 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:08:45,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 584 transitions, 8601 flow [2024-06-27 20:08:49,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 584 transitions, 8294 flow, removed 112 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:49,925 INFO L231 Difference]: Finished difference. Result has 410 places, 561 transitions, 7212 flow [2024-06-27 20:08:49,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7212, PETRI_PLACES=410, PETRI_TRANSITIONS=561} [2024-06-27 20:08:49,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-27 20:08:49,925 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 561 transitions, 7212 flow [2024-06-27 20:08:49,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:49,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:49,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:49,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:08:49,926 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:49,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1999966462, now seen corresponding path program 8 times [2024-06-27 20:08:49,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:49,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489433279] [2024-06-27 20:08:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:49,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:50,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:50,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489433279] [2024-06-27 20:08:50,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489433279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:50,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:50,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:50,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035665286] [2024-06-27 20:08:50,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:50,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:50,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:50,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 561 transitions, 7212 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:50,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:50,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:50,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:52,269 INFO L124 PetriNetUnfolderBase]: 2861/4605 cut-off events. [2024-06-27 20:08:52,269 INFO L125 PetriNetUnfolderBase]: For 1412558/1412564 co-relation queries the response was YES. [2024-06-27 20:08:52,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62682 conditions, 4605 events. 2861/4605 cut-off events. For 1412558/1412564 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 27508 event pairs, 534 based on Foata normal form. 7/4611 useless extension candidates. Maximal degree in co-relation 62493. Up to 4229 conditions per place. [2024-06-27 20:08:52,349 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 542 selfloop transitions, 36 changer transitions 0/583 dead transitions. [2024-06-27 20:08:52,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 583 transitions, 8481 flow [2024-06-27 20:08:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:08:52,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:08:52,350 INFO L175 Difference]: Start difference. First operand has 410 places, 561 transitions, 7212 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:08:52,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 583 transitions, 8481 flow [2024-06-27 20:08:57,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 583 transitions, 7951 flow, removed 192 selfloop flow, removed 8 redundant places. [2024-06-27 20:08:57,112 INFO L231 Difference]: Finished difference. Result has 411 places, 562 transitions, 6811 flow [2024-06-27 20:08:57,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6720, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6811, PETRI_PLACES=411, PETRI_TRANSITIONS=562} [2024-06-27 20:08:57,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-27 20:08:57,112 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 562 transitions, 6811 flow [2024-06-27 20:08:57,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:57,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:57,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:57,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:08:57,113 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:57,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:57,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1999966834, now seen corresponding path program 10 times [2024-06-27 20:08:57,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:57,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525834382] [2024-06-27 20:08:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:57,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525834382] [2024-06-27 20:08:57,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525834382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:57,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:57,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:57,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741497991] [2024-06-27 20:08:57,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:57,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:57,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:58,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:08:58,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 562 transitions, 6811 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:58,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:58,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:08:58,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:59,254 INFO L124 PetriNetUnfolderBase]: 2858/4599 cut-off events. [2024-06-27 20:08:59,254 INFO L125 PetriNetUnfolderBase]: For 1413179/1413179 co-relation queries the response was YES. [2024-06-27 20:08:59,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62050 conditions, 4599 events. 2858/4599 cut-off events. For 1413179/1413179 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 27424 event pairs, 543 based on Foata normal form. 1/4599 useless extension candidates. Maximal degree in co-relation 61860. Up to 4084 conditions per place. [2024-06-27 20:08:59,332 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 503 selfloop transitions, 74 changer transitions 0/582 dead transitions. [2024-06-27 20:08:59,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 582 transitions, 8023 flow [2024-06-27 20:08:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:08:59,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:08:59,333 INFO L175 Difference]: Start difference. First operand has 411 places, 562 transitions, 6811 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:08:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 582 transitions, 8023 flow [2024-06-27 20:09:04,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 582 transitions, 7787 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-27 20:09:04,029 INFO L231 Difference]: Finished difference. Result has 413 places, 562 transitions, 6729 flow [2024-06-27 20:09:04,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6575, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6729, PETRI_PLACES=413, PETRI_TRANSITIONS=562} [2024-06-27 20:09:04,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-27 20:09:04,030 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 562 transitions, 6729 flow [2024-06-27 20:09:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:04,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:04,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:04,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:09:04,030 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:04,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1996241998, now seen corresponding path program 14 times [2024-06-27 20:09:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:04,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918880914] [2024-06-27 20:09:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:04,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:04,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918880914] [2024-06-27 20:09:04,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918880914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:04,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:04,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:04,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242567266] [2024-06-27 20:09:04,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:04,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:04,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:04,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:04,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:04,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:09:04,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 562 transitions, 6729 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:04,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:04,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:09:04,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:06,210 INFO L124 PetriNetUnfolderBase]: 2868/4613 cut-off events. [2024-06-27 20:09:06,210 INFO L125 PetriNetUnfolderBase]: For 1440337/1440337 co-relation queries the response was YES. [2024-06-27 20:09:06,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62536 conditions, 4613 events. 2868/4613 cut-off events. For 1440337/1440337 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 27501 event pairs, 507 based on Foata normal form. 2/4614 useless extension candidates. Maximal degree in co-relation 62345. Up to 4163 conditions per place. [2024-06-27 20:09:06,294 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 521 selfloop transitions, 60 changer transitions 0/586 dead transitions. [2024-06-27 20:09:06,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 586 transitions, 8475 flow [2024-06-27 20:09:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:09:06,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:09:06,295 INFO L175 Difference]: Start difference. First operand has 413 places, 562 transitions, 6729 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:09:06,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 586 transitions, 8475 flow [2024-06-27 20:09:11,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 586 transitions, 8218 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:09:11,621 INFO L231 Difference]: Finished difference. Result has 414 places, 566 transitions, 6851 flow [2024-06-27 20:09:11,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6472, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6851, PETRI_PLACES=414, PETRI_TRANSITIONS=566} [2024-06-27 20:09:11,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-27 20:09:11,621 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 566 transitions, 6851 flow [2024-06-27 20:09:11,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:11,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:11,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:11,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:09:11,622 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:11,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash 706435789, now seen corresponding path program 5 times [2024-06-27 20:09:11,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:11,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821774390] [2024-06-27 20:09:11,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:11,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:12,372 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 20:09:12,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:12,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821774390] [2024-06-27 20:09:12,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821774390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:12,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:12,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037508496] [2024-06-27 20:09:12,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:12,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:12,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:12,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:09:12,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 566 transitions, 6851 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:12,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:12,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:09:12,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:13,866 INFO L124 PetriNetUnfolderBase]: 2856/4599 cut-off events. [2024-06-27 20:09:13,866 INFO L125 PetriNetUnfolderBase]: For 1438489/1438495 co-relation queries the response was YES. [2024-06-27 20:09:13,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61763 conditions, 4599 events. 2856/4599 cut-off events. For 1438489/1438495 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 27481 event pairs, 532 based on Foata normal form. 10/4608 useless extension candidates. Maximal degree in co-relation 61571. Up to 4241 conditions per place. [2024-06-27 20:09:13,940 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 551 selfloop transitions, 31 changer transitions 0/587 dead transitions. [2024-06-27 20:09:13,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 587 transitions, 8133 flow [2024-06-27 20:09:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:09:13,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:09:13,941 INFO L175 Difference]: Start difference. First operand has 414 places, 566 transitions, 6851 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:09:13,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 587 transitions, 8133 flow [2024-06-27 20:09:19,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 587 transitions, 7513 flow, removed 205 selfloop flow, removed 8 redundant places. [2024-06-27 20:09:19,336 INFO L231 Difference]: Finished difference. Result has 415 places, 567 transitions, 6340 flow [2024-06-27 20:09:19,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6340, PETRI_PLACES=415, PETRI_TRANSITIONS=567} [2024-06-27 20:09:19,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-27 20:09:19,336 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 567 transitions, 6340 flow [2024-06-27 20:09:19,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:19,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:19,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:19,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:09:19,337 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:19,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash 706435572, now seen corresponding path program 9 times [2024-06-27 20:09:19,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:19,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352231403] [2024-06-27 20:09:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:20,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:20,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352231403] [2024-06-27 20:09:20,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352231403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:20,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:20,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:20,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200646345] [2024-06-27 20:09:20,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:20,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:20,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:20,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:09:20,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 567 transitions, 6340 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:20,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:20,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:09:20,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:21,730 INFO L124 PetriNetUnfolderBase]: 2853/4595 cut-off events. [2024-06-27 20:09:21,730 INFO L125 PetriNetUnfolderBase]: For 1408814/1408820 co-relation queries the response was YES. [2024-06-27 20:09:21,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60700 conditions, 4595 events. 2853/4595 cut-off events. For 1408814/1408820 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 27503 event pairs, 532 based on Foata normal form. 7/4601 useless extension candidates. Maximal degree in co-relation 60508. Up to 4246 conditions per place. [2024-06-27 20:09:21,809 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 551 selfloop transitions, 30 changer transitions 0/586 dead transitions. [2024-06-27 20:09:21,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 586 transitions, 7564 flow [2024-06-27 20:09:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:09:21,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:09:21,810 INFO L175 Difference]: Start difference. First operand has 415 places, 567 transitions, 6340 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:09:21,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 586 transitions, 7564 flow [2024-06-27 20:09:26,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 586 transitions, 7383 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-27 20:09:26,586 INFO L231 Difference]: Finished difference. Result has 417 places, 567 transitions, 6225 flow [2024-06-27 20:09:26,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6225, PETRI_PLACES=417, PETRI_TRANSITIONS=567} [2024-06-27 20:09:26,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-27 20:09:26,587 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 567 transitions, 6225 flow [2024-06-27 20:09:26,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:26,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:26,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:09:26,587 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:26,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 706424226, now seen corresponding path program 15 times [2024-06-27 20:09:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407109611] [2024-06-27 20:09:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:27,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:27,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407109611] [2024-06-27 20:09:27,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407109611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:27,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:27,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:27,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384093870] [2024-06-27 20:09:27,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:27,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:27,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:27,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:09:27,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 567 transitions, 6225 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:27,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:27,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:09:27,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:28,693 INFO L124 PetriNetUnfolderBase]: 2847/4585 cut-off events. [2024-06-27 20:09:28,693 INFO L125 PetriNetUnfolderBase]: For 1413614/1413614 co-relation queries the response was YES. [2024-06-27 20:09:28,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60214 conditions, 4585 events. 2847/4585 cut-off events. For 1413614/1413614 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 27391 event pairs, 541 based on Foata normal form. 2/4586 useless extension candidates. Maximal degree in co-relation 60021. Up to 4155 conditions per place. [2024-06-27 20:09:28,772 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 533 selfloop transitions, 49 changer transitions 0/587 dead transitions. [2024-06-27 20:09:28,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 587 transitions, 7461 flow [2024-06-27 20:09:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:09:28,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:09:28,773 INFO L175 Difference]: Start difference. First operand has 417 places, 567 transitions, 6225 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:09:28,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 587 transitions, 7461 flow [2024-06-27 20:09:34,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 587 transitions, 7150 flow, removed 115 selfloop flow, removed 8 redundant places. [2024-06-27 20:09:34,304 INFO L231 Difference]: Finished difference. Result has 418 places, 567 transitions, 6019 flow [2024-06-27 20:09:34,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6019, PETRI_PLACES=418, PETRI_TRANSITIONS=567} [2024-06-27 20:09:34,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-27 20:09:34,305 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 567 transitions, 6019 flow [2024-06-27 20:09:34,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:34,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:34,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:34,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:09:34,306 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:34,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash -157422782, now seen corresponding path program 10 times [2024-06-27 20:09:34,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:34,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537192329] [2024-06-27 20:09:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:34,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:35,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:35,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537192329] [2024-06-27 20:09:35,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537192329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:35,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:35,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363579880] [2024-06-27 20:09:35,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:35,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:35,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:09:35,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 567 transitions, 6019 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:35,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:35,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:09:35,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:36,804 INFO L124 PetriNetUnfolderBase]: 2860/4609 cut-off events. [2024-06-27 20:09:36,804 INFO L125 PetriNetUnfolderBase]: For 1433873/1433879 co-relation queries the response was YES. [2024-06-27 20:09:36,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60802 conditions, 4609 events. 2860/4609 cut-off events. For 1433873/1433879 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 27602 event pairs, 496 based on Foata normal form. 7/4615 useless extension candidates. Maximal degree in co-relation 60608. Up to 4197 conditions per place. [2024-06-27 20:09:36,886 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 523 selfloop transitions, 64 changer transitions 0/592 dead transitions. [2024-06-27 20:09:36,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 592 transitions, 7961 flow [2024-06-27 20:09:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:09:36,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 20:09:36,888 INFO L175 Difference]: Start difference. First operand has 418 places, 567 transitions, 6019 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:09:36,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 592 transitions, 7961 flow [2024-06-27 20:09:41,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 592 transitions, 7827 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:09:41,943 INFO L231 Difference]: Finished difference. Result has 420 places, 575 transitions, 6485 flow [2024-06-27 20:09:41,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6485, PETRI_PLACES=420, PETRI_TRANSITIONS=575} [2024-06-27 20:09:41,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 20:09:41,944 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 575 transitions, 6485 flow [2024-06-27 20:09:41,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:41,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:41,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:41,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:09:41,945 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:41,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:41,945 INFO L85 PathProgramCache]: Analyzing trace with hash -391892881, now seen corresponding path program 6 times [2024-06-27 20:09:41,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:41,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544944372] [2024-06-27 20:09:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:41,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:42,734 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 20:09:42,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:42,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544944372] [2024-06-27 20:09:42,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544944372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:42,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:42,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103134965] [2024-06-27 20:09:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:42,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:09:42,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 575 transitions, 6485 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:42,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:42,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:09:42,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:44,241 INFO L124 PetriNetUnfolderBase]: 2944/4729 cut-off events. [2024-06-27 20:09:44,241 INFO L125 PetriNetUnfolderBase]: For 1591995/1592001 co-relation queries the response was YES. [2024-06-27 20:09:44,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64977 conditions, 4729 events. 2944/4729 cut-off events. For 1591995/1592001 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28326 event pairs, 533 based on Foata normal form. 10/4738 useless extension candidates. Maximal degree in co-relation 64781. Up to 4243 conditions per place. [2024-06-27 20:09:44,318 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 529 selfloop transitions, 74 changer transitions 0/608 dead transitions. [2024-06-27 20:09:44,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 608 transitions, 9085 flow [2024-06-27 20:09:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:09:44,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:09:44,319 INFO L175 Difference]: Start difference. First operand has 420 places, 575 transitions, 6485 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:09:44,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 608 transitions, 9085 flow [2024-06-27 20:09:49,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 608 transitions, 8767 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-27 20:09:49,548 INFO L231 Difference]: Finished difference. Result has 424 places, 587 transitions, 7062 flow [2024-06-27 20:09:49,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6167, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7062, PETRI_PLACES=424, PETRI_TRANSITIONS=587} [2024-06-27 20:09:49,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-27 20:09:49,549 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 587 transitions, 7062 flow [2024-06-27 20:09:49,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:49,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:49,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:49,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:09:49,549 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:49,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash -157214245, now seen corresponding path program 7 times [2024-06-27 20:09:49,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:49,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439199145] [2024-06-27 20:09:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:49,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:50,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439199145] [2024-06-27 20:09:50,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439199145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:50,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:50,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:50,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774272399] [2024-06-27 20:09:50,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:50,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:50,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:50,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:50,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:09:50,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 587 transitions, 7062 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:50,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:50,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:09:50,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:51,916 INFO L124 PetriNetUnfolderBase]: 2938/4713 cut-off events. [2024-06-27 20:09:51,916 INFO L125 PetriNetUnfolderBase]: For 1578870/1578870 co-relation queries the response was YES. [2024-06-27 20:09:51,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65062 conditions, 4713 events. 2938/4713 cut-off events. For 1578870/1578870 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 28084 event pairs, 538 based on Foata normal form. 2/4714 useless extension candidates. Maximal degree in co-relation 64864. Up to 4398 conditions per place. [2024-06-27 20:09:51,999 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 574 selfloop transitions, 26 changer transitions 0/605 dead transitions. [2024-06-27 20:09:52,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 605 transitions, 8546 flow [2024-06-27 20:09:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:09:52,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:09:52,000 INFO L175 Difference]: Start difference. First operand has 424 places, 587 transitions, 7062 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:09:52,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 605 transitions, 8546 flow [2024-06-27 20:09:57,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 605 transitions, 8126 flow, removed 191 selfloop flow, removed 4 redundant places. [2024-06-27 20:09:57,837 INFO L231 Difference]: Finished difference. Result has 429 places, 591 transitions, 6955 flow [2024-06-27 20:09:57,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6700, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6955, PETRI_PLACES=429, PETRI_TRANSITIONS=591} [2024-06-27 20:09:57,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-27 20:09:57,838 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 591 transitions, 6955 flow [2024-06-27 20:09:57,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:57,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:57,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:57,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:09:57,838 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:57,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -517042109, now seen corresponding path program 8 times [2024-06-27 20:09:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:57,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067362728] [2024-06-27 20:09:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:58,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:58,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067362728] [2024-06-27 20:09:58,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067362728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:58,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:58,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:58,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183463920] [2024-06-27 20:09:58,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:58,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:58,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:58,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:09:58,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 591 transitions, 6955 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:58,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:58,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:09:58,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:00,053 INFO L124 PetriNetUnfolderBase]: 2932/4706 cut-off events. [2024-06-27 20:10:00,053 INFO L125 PetriNetUnfolderBase]: For 1555563/1555569 co-relation queries the response was YES. [2024-06-27 20:10:00,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64069 conditions, 4706 events. 2932/4706 cut-off events. For 1555563/1555569 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 28071 event pairs, 531 based on Foata normal form. 8/4713 useless extension candidates. Maximal degree in co-relation 63869. Up to 4333 conditions per place. [2024-06-27 20:10:00,137 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 566 selfloop transitions, 41 changer transitions 0/612 dead transitions. [2024-06-27 20:10:00,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 612 transitions, 8447 flow [2024-06-27 20:10:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:10:00,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:10:00,138 INFO L175 Difference]: Start difference. First operand has 429 places, 591 transitions, 6955 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:10:00,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 612 transitions, 8447 flow [2024-06-27 20:10:06,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 612 transitions, 8207 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:06,301 INFO L231 Difference]: Finished difference. Result has 431 places, 595 transitions, 7030 flow [2024-06-27 20:10:06,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7030, PETRI_PLACES=431, PETRI_TRANSITIONS=595} [2024-06-27 20:10:06,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-27 20:10:06,302 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 595 transitions, 7030 flow [2024-06-27 20:10:06,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:06,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:06,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:06,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:10:06,302 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:06,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:06,302 INFO L85 PathProgramCache]: Analyzing trace with hash 395966490, now seen corresponding path program 16 times [2024-06-27 20:10:06,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:06,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631158208] [2024-06-27 20:10:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:06,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:07,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:07,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631158208] [2024-06-27 20:10:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631158208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:07,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:07,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399273408] [2024-06-27 20:10:07,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:07,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:07,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:07,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:07,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:07,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:10:07,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 595 transitions, 7030 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:07,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:07,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:10:07,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:08,501 INFO L124 PetriNetUnfolderBase]: 2942/4721 cut-off events. [2024-06-27 20:10:08,501 INFO L125 PetriNetUnfolderBase]: For 1577042/1577042 co-relation queries the response was YES. [2024-06-27 20:10:08,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64578 conditions, 4721 events. 2942/4721 cut-off events. For 1577042/1577042 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28143 event pairs, 540 based on Foata normal form. 2/4722 useless extension candidates. Maximal degree in co-relation 64377. Up to 4237 conditions per place. [2024-06-27 20:10:08,583 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 543 selfloop transitions, 69 changer transitions 0/617 dead transitions. [2024-06-27 20:10:08,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 617 transitions, 8680 flow [2024-06-27 20:10:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:10:08,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:10:08,584 INFO L175 Difference]: Start difference. First operand has 431 places, 595 transitions, 7030 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:10:08,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 617 transitions, 8680 flow [2024-06-27 20:10:13,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 617 transitions, 8399 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:13,744 INFO L231 Difference]: Finished difference. Result has 433 places, 599 transitions, 7206 flow [2024-06-27 20:10:13,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7206, PETRI_PLACES=433, PETRI_TRANSITIONS=599} [2024-06-27 20:10:13,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 20:10:13,745 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 599 transitions, 7206 flow [2024-06-27 20:10:13,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:13,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:13,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:13,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:10:13,746 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:13,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash -404780294, now seen corresponding path program 17 times [2024-06-27 20:10:13,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:13,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535937247] [2024-06-27 20:10:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:13,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:14,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:14,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535937247] [2024-06-27 20:10:14,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535937247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:14,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:14,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:14,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145290675] [2024-06-27 20:10:14,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:14,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:14,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:14,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:10:14,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 599 transitions, 7206 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:14,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:14,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:10:14,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:16,059 INFO L124 PetriNetUnfolderBase]: 2952/4739 cut-off events. [2024-06-27 20:10:16,059 INFO L125 PetriNetUnfolderBase]: For 1614321/1614321 co-relation queries the response was YES. [2024-06-27 20:10:16,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65519 conditions, 4739 events. 2952/4739 cut-off events. For 1614321/1614321 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 28326 event pairs, 540 based on Foata normal form. 2/4740 useless extension candidates. Maximal degree in co-relation 65317. Up to 4239 conditions per place. [2024-06-27 20:10:16,137 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 540 selfloop transitions, 76 changer transitions 0/621 dead transitions. [2024-06-27 20:10:16,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 621 transitions, 8874 flow [2024-06-27 20:10:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:10:16,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:10:16,138 INFO L175 Difference]: Start difference. First operand has 433 places, 599 transitions, 7206 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:10:16,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 621 transitions, 8874 flow [2024-06-27 20:10:21,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 621 transitions, 8445 flow, removed 148 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:21,345 INFO L231 Difference]: Finished difference. Result has 435 places, 603 transitions, 7256 flow [2024-06-27 20:10:21,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7256, PETRI_PLACES=435, PETRI_TRANSITIONS=603} [2024-06-27 20:10:21,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 20:10:21,345 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 603 transitions, 7256 flow [2024-06-27 20:10:21,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:21,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:21,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:10:21,346 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:21,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:21,346 INFO L85 PathProgramCache]: Analyzing trace with hash -170546942, now seen corresponding path program 11 times [2024-06-27 20:10:21,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:21,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552775839] [2024-06-27 20:10:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:21,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:22,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:22,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552775839] [2024-06-27 20:10:22,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552775839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:22,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:22,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:22,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983606461] [2024-06-27 20:10:22,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:22,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:22,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:22,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:22,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:10:22,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 603 transitions, 7256 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:22,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:22,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:10:22,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:23,765 INFO L124 PetriNetUnfolderBase]: 2957/4750 cut-off events. [2024-06-27 20:10:23,765 INFO L125 PetriNetUnfolderBase]: For 1630474/1630480 co-relation queries the response was YES. [2024-06-27 20:10:23,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65943 conditions, 4750 events. 2957/4750 cut-off events. For 1630474/1630480 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 28458 event pairs, 495 based on Foata normal form. 7/4756 useless extension candidates. Maximal degree in co-relation 65740. Up to 4371 conditions per place. [2024-06-27 20:10:23,849 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 578 selfloop transitions, 40 changer transitions 0/623 dead transitions. [2024-06-27 20:10:23,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 623 transitions, 8727 flow [2024-06-27 20:10:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:10:23,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:10:23,850 INFO L175 Difference]: Start difference. First operand has 435 places, 603 transitions, 7256 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:10:23,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 623 transitions, 8727 flow [2024-06-27 20:10:30,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 623 transitions, 8276 flow, removed 152 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:30,415 INFO L231 Difference]: Finished difference. Result has 437 places, 606 transitions, 7072 flow [2024-06-27 20:10:30,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6805, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7072, PETRI_PLACES=437, PETRI_TRANSITIONS=606} [2024-06-27 20:10:30,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 20:10:30,416 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 606 transitions, 7072 flow [2024-06-27 20:10:30,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:30,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:30,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:30,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:10:30,417 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:30,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:30,417 INFO L85 PathProgramCache]: Analyzing trace with hash -157659932, now seen corresponding path program 12 times [2024-06-27 20:10:30,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:30,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51405511] [2024-06-27 20:10:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:30,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:31,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:31,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51405511] [2024-06-27 20:10:31,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51405511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:31,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:31,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806525685] [2024-06-27 20:10:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:31,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:31,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:31,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:10:31,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 606 transitions, 7072 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:31,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:31,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:10:31,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:32,823 INFO L124 PetriNetUnfolderBase]: 2954/4744 cut-off events. [2024-06-27 20:10:32,823 INFO L125 PetriNetUnfolderBase]: For 1629935/1629941 co-relation queries the response was YES. [2024-06-27 20:10:32,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65287 conditions, 4744 events. 2954/4744 cut-off events. For 1629935/1629941 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 28347 event pairs, 531 based on Foata normal form. 7/4750 useless extension candidates. Maximal degree in co-relation 65083. Up to 4328 conditions per place. [2024-06-27 20:10:32,907 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 553 selfloop transitions, 65 changer transitions 0/623 dead transitions. [2024-06-27 20:10:32,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 623 transitions, 8411 flow [2024-06-27 20:10:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:10:32,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:10:32,908 INFO L175 Difference]: Start difference. First operand has 437 places, 606 transitions, 7072 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:10:32,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 623 transitions, 8411 flow [2024-06-27 20:10:39,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 623 transitions, 7991 flow, removed 172 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:39,638 INFO L231 Difference]: Finished difference. Result has 439 places, 607 transitions, 6839 flow [2024-06-27 20:10:39,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6692, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6839, PETRI_PLACES=439, PETRI_TRANSITIONS=607} [2024-06-27 20:10:39,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-27 20:10:39,638 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 607 transitions, 6839 flow [2024-06-27 20:10:39,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:39,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:39,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:39,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:10:39,639 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:39,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash -157660118, now seen corresponding path program 18 times [2024-06-27 20:10:39,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:39,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465790934] [2024-06-27 20:10:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:40,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:40,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465790934] [2024-06-27 20:10:40,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465790934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:40,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:40,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106714139] [2024-06-27 20:10:40,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:40,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:40,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:40,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:40,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:40,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:10:40,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 607 transitions, 6839 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:40,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:40,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:10:40,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:42,024 INFO L124 PetriNetUnfolderBase]: 2964/4764 cut-off events. [2024-06-27 20:10:42,025 INFO L125 PetriNetUnfolderBase]: For 1660533/1660533 co-relation queries the response was YES. [2024-06-27 20:10:42,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65623 conditions, 4764 events. 2964/4764 cut-off events. For 1660533/1660533 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28574 event pairs, 540 based on Foata normal form. 2/4765 useless extension candidates. Maximal degree in co-relation 65418. Up to 4184 conditions per place. [2024-06-27 20:10:42,102 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 504 selfloop transitions, 119 changer transitions 0/628 dead transitions. [2024-06-27 20:10:42,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 628 transitions, 8523 flow [2024-06-27 20:10:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:10:42,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:10:42,103 INFO L175 Difference]: Start difference. First operand has 439 places, 607 transitions, 6839 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:10:42,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 628 transitions, 8523 flow [2024-06-27 20:10:48,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 628 transitions, 8404 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:10:48,515 INFO L231 Difference]: Finished difference. Result has 442 places, 611 transitions, 7293 flow [2024-06-27 20:10:48,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6720, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7293, PETRI_PLACES=442, PETRI_TRANSITIONS=611} [2024-06-27 20:10:48,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-27 20:10:48,516 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 611 transitions, 7293 flow [2024-06-27 20:10:48,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:48,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:48,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:48,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:10:48,516 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:48,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash 772537185, now seen corresponding path program 9 times [2024-06-27 20:10:48,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:48,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195786613] [2024-06-27 20:10:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:48,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:49,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:49,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195786613] [2024-06-27 20:10:49,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195786613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:49,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:49,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:49,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580476868] [2024-06-27 20:10:49,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:49,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:49,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:49,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:49,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:49,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:10:49,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 611 transitions, 7293 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:49,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:49,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:10:49,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:50,897 INFO L124 PetriNetUnfolderBase]: 3006/4817 cut-off events. [2024-06-27 20:10:50,898 INFO L125 PetriNetUnfolderBase]: For 1749647/1749649 co-relation queries the response was YES. [2024-06-27 20:10:50,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68384 conditions, 4817 events. 3006/4817 cut-off events. For 1749647/1749649 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 28848 event pairs, 535 based on Foata normal form. 4/4820 useless extension candidates. Maximal degree in co-relation 68178. Up to 4373 conditions per place. [2024-06-27 20:10:51,004 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 551 selfloop transitions, 80 changer transitions 0/636 dead transitions. [2024-06-27 20:10:51,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 636 transitions, 9349 flow [2024-06-27 20:10:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:10:51,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:10:51,005 INFO L175 Difference]: Start difference. First operand has 442 places, 611 transitions, 7293 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:10:51,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 636 transitions, 9349 flow [2024-06-27 20:10:57,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 636 transitions, 8804 flow, removed 156 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:57,237 INFO L231 Difference]: Finished difference. Result has 445 places, 621 transitions, 7377 flow [2024-06-27 20:10:57,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7377, PETRI_PLACES=445, PETRI_TRANSITIONS=621} [2024-06-27 20:10:57,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-27 20:10:57,238 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 621 transitions, 7377 flow [2024-06-27 20:10:57,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:57,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:57,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:57,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:10:57,238 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:57,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:57,238 INFO L85 PathProgramCache]: Analyzing trace with hash 528900435, now seen corresponding path program 10 times [2024-06-27 20:10:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:57,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365883224] [2024-06-27 20:10:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:58,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365883224] [2024-06-27 20:10:58,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365883224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:58,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:58,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:58,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603125433] [2024-06-27 20:10:58,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:58,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:58,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:58,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:58,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:58,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:10:58,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 621 transitions, 7377 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:58,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:58,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:10:58,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:59,693 INFO L124 PetriNetUnfolderBase]: 3016/4833 cut-off events. [2024-06-27 20:10:59,693 INFO L125 PetriNetUnfolderBase]: For 1774837/1774839 co-relation queries the response was YES. [2024-06-27 20:10:59,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68744 conditions, 4833 events. 3016/4833 cut-off events. For 1774837/1774839 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 28952 event pairs, 537 based on Foata normal form. 4/4836 useless extension candidates. Maximal degree in co-relation 68536. Up to 4383 conditions per place. [2024-06-27 20:10:59,785 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 552 selfloop transitions, 85 changer transitions 0/642 dead transitions. [2024-06-27 20:10:59,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 642 transitions, 9201 flow [2024-06-27 20:10:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:10:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:10:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 20:10:59,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2024-06-27 20:10:59,786 INFO L175 Difference]: Start difference. First operand has 445 places, 621 transitions, 7377 flow. Second operand 11 states and 189 transitions. [2024-06-27 20:10:59,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 642 transitions, 9201 flow [2024-06-27 20:11:06,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 642 transitions, 8870 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:06,516 INFO L231 Difference]: Finished difference. Result has 451 places, 624 transitions, 7375 flow [2024-06-27 20:11:06,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7084, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7375, PETRI_PLACES=451, PETRI_TRANSITIONS=624} [2024-06-27 20:11:06,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 20:11:06,516 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 624 transitions, 7375 flow [2024-06-27 20:11:06,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:06,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:06,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:06,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:11:06,517 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:06,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1087667650, now seen corresponding path program 19 times [2024-06-27 20:11:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:06,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720659934] [2024-06-27 20:11:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:06,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:07,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:07,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720659934] [2024-06-27 20:11:07,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720659934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:07,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:07,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:07,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638476974] [2024-06-27 20:11:07,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:07,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:07,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:07,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:07,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:11:07,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 624 transitions, 7375 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:07,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:07,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:11:07,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:09,176 INFO L124 PetriNetUnfolderBase]: 3026/4850 cut-off events. [2024-06-27 20:11:09,177 INFO L125 PetriNetUnfolderBase]: For 1786216/1786216 co-relation queries the response was YES. [2024-06-27 20:11:09,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68955 conditions, 4850 events. 3026/4850 cut-off events. For 1786216/1786216 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 29059 event pairs, 543 based on Foata normal form. 2/4851 useless extension candidates. Maximal degree in co-relation 68745. Up to 4467 conditions per place. [2024-06-27 20:11:09,262 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 593 selfloop transitions, 42 changer transitions 0/640 dead transitions. [2024-06-27 20:11:09,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 640 transitions, 9073 flow [2024-06-27 20:11:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:11:09,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:11:09,263 INFO L175 Difference]: Start difference. First operand has 451 places, 624 transitions, 7375 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:11:09,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 640 transitions, 9073 flow [2024-06-27 20:11:15,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 640 transitions, 8833 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 20:11:15,867 INFO L231 Difference]: Finished difference. Result has 452 places, 628 transitions, 7566 flow [2024-06-27 20:11:15,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7566, PETRI_PLACES=452, PETRI_TRANSITIONS=628} [2024-06-27 20:11:15,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-27 20:11:15,867 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 628 transitions, 7566 flow [2024-06-27 20:11:15,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:15,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:15,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:11:15,867 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:15,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1180592468, now seen corresponding path program 13 times [2024-06-27 20:11:15,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:15,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147140768] [2024-06-27 20:11:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:15,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:16,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147140768] [2024-06-27 20:11:16,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147140768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:16,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:16,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:16,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740885206] [2024-06-27 20:11:16,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:16,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:16,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:17,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:11:17,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 628 transitions, 7566 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:17,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:17,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:11:17,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:18,501 INFO L124 PetriNetUnfolderBase]: 3039/4875 cut-off events. [2024-06-27 20:11:18,501 INFO L125 PetriNetUnfolderBase]: For 1833270/1833278 co-relation queries the response was YES. [2024-06-27 20:11:18,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70085 conditions, 4875 events. 3039/4875 cut-off events. For 1833270/1833278 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 29328 event pairs, 540 based on Foata normal form. 9/4883 useless extension candidates. Maximal degree in co-relation 69874. Up to 4410 conditions per place. [2024-06-27 20:11:18,595 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 567 selfloop transitions, 78 changer transitions 0/650 dead transitions. [2024-06-27 20:11:18,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 650 transitions, 9700 flow [2024-06-27 20:11:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:11:18,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 20:11:18,596 INFO L175 Difference]: Start difference. First operand has 452 places, 628 transitions, 7566 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:11:18,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 650 transitions, 9700 flow [2024-06-27 20:11:24,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 650 transitions, 9297 flow, removed 162 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:24,253 INFO L231 Difference]: Finished difference. Result has 455 places, 636 transitions, 7850 flow [2024-06-27 20:11:24,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7850, PETRI_PLACES=455, PETRI_TRANSITIONS=636} [2024-06-27 20:11:24,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 20:11:24,254 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 636 transitions, 7850 flow [2024-06-27 20:11:24,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:24,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:24,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:24,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:11:24,255 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:24,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1675727410, now seen corresponding path program 20 times [2024-06-27 20:11:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:24,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863195776] [2024-06-27 20:11:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:25,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863195776] [2024-06-27 20:11:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863195776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:25,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:25,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:25,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907080645] [2024-06-27 20:11:25,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:25,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:25,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:25,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:11:25,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 636 transitions, 7850 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:25,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:25,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:11:25,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:26,738 INFO L124 PetriNetUnfolderBase]: 3049/4894 cut-off events. [2024-06-27 20:11:26,738 INFO L125 PetriNetUnfolderBase]: For 1875386/1875388 co-relation queries the response was YES. [2024-06-27 20:11:26,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70708 conditions, 4894 events. 3049/4894 cut-off events. For 1875386/1875388 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 29562 event pairs, 564 based on Foata normal form. 4/4897 useless extension candidates. Maximal degree in co-relation 70495. Up to 4294 conditions per place. [2024-06-27 20:11:26,826 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 547 selfloop transitions, 104 changer transitions 0/656 dead transitions. [2024-06-27 20:11:26,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 656 transitions, 9750 flow [2024-06-27 20:11:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:11:26,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 20:11:26,827 INFO L175 Difference]: Start difference. First operand has 455 places, 636 transitions, 7850 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:11:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 656 transitions, 9750 flow [2024-06-27 20:11:33,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 656 transitions, 9368 flow, removed 150 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:33,743 INFO L231 Difference]: Finished difference. Result has 459 places, 640 transitions, 8035 flow [2024-06-27 20:11:33,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7468, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8035, PETRI_PLACES=459, PETRI_TRANSITIONS=640} [2024-06-27 20:11:33,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-27 20:11:33,743 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 640 transitions, 8035 flow [2024-06-27 20:11:33,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:33,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:33,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:33,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:11:33,744 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:33,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:33,744 INFO L85 PathProgramCache]: Analyzing trace with hash 837307016, now seen corresponding path program 14 times [2024-06-27 20:11:33,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:33,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974518722] [2024-06-27 20:11:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:33,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:34,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:34,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974518722] [2024-06-27 20:11:34,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974518722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:34,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:34,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:34,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169683159] [2024-06-27 20:11:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:34,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:34,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:34,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:11:34,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 640 transitions, 8035 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:34,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:34,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:11:34,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:36,219 INFO L124 PetriNetUnfolderBase]: 3054/4902 cut-off events. [2024-06-27 20:11:36,219 INFO L125 PetriNetUnfolderBase]: For 1893391/1893399 co-relation queries the response was YES. [2024-06-27 20:11:36,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71486 conditions, 4902 events. 3054/4902 cut-off events. For 1893391/1893399 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 29600 event pairs, 540 based on Foata normal form. 9/4910 useless extension candidates. Maximal degree in co-relation 71271. Up to 4469 conditions per place. [2024-06-27 20:11:36,316 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 594 selfloop transitions, 58 changer transitions 0/657 dead transitions. [2024-06-27 20:11:36,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 657 transitions, 9580 flow [2024-06-27 20:11:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:11:36,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:11:36,317 INFO L175 Difference]: Start difference. First operand has 459 places, 640 transitions, 8035 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:11:36,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 657 transitions, 9580 flow [2024-06-27 20:11:43,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 657 transitions, 9041 flow, removed 168 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:43,901 INFO L231 Difference]: Finished difference. Result has 461 places, 643 transitions, 7815 flow [2024-06-27 20:11:43,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7496, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7815, PETRI_PLACES=461, PETRI_TRANSITIONS=643} [2024-06-27 20:11:43,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-27 20:11:43,901 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 643 transitions, 7815 flow [2024-06-27 20:11:43,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:43,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:43,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:43,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:11:43,902 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:43,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:43,902 INFO L85 PathProgramCache]: Analyzing trace with hash 755507253, now seen corresponding path program 11 times [2024-06-27 20:11:43,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:43,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040307559] [2024-06-27 20:11:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:43,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:44,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040307559] [2024-06-27 20:11:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040307559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:44,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:44,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847030179] [2024-06-27 20:11:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:44,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:11:44,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 643 transitions, 7815 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:44,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:44,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:11:44,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:46,405 INFO L124 PetriNetUnfolderBase]: 3064/4912 cut-off events. [2024-06-27 20:11:46,405 INFO L125 PetriNetUnfolderBase]: For 1920141/1920149 co-relation queries the response was YES. [2024-06-27 20:11:46,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71378 conditions, 4912 events. 3064/4912 cut-off events. For 1920141/1920149 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 29624 event pairs, 539 based on Foata normal form. 10/4921 useless extension candidates. Maximal degree in co-relation 71162. Up to 4480 conditions per place. [2024-06-27 20:11:46,497 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 597 selfloop transitions, 59 changer transitions 0/661 dead transitions. [2024-06-27 20:11:46,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 661 transitions, 9457 flow [2024-06-27 20:11:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:11:46,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:11:46,498 INFO L175 Difference]: Start difference. First operand has 461 places, 643 transitions, 7815 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:11:46,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 661 transitions, 9457 flow [2024-06-27 20:11:54,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 661 transitions, 9169 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:54,240 INFO L231 Difference]: Finished difference. Result has 463 places, 647 transitions, 7940 flow [2024-06-27 20:11:54,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7527, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7940, PETRI_PLACES=463, PETRI_TRANSITIONS=647} [2024-06-27 20:11:54,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-27 20:11:54,241 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 647 transitions, 7940 flow [2024-06-27 20:11:54,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:54,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:54,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:11:54,242 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:54,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 755358050, now seen corresponding path program 21 times [2024-06-27 20:11:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:54,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354642445] [2024-06-27 20:11:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354642445] [2024-06-27 20:11:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354642445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:55,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:55,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:55,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458667889] [2024-06-27 20:11:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:55,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:55,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:55,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:11:55,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 647 transitions, 7940 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:55,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:55,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:11:55,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:56,779 INFO L124 PetriNetUnfolderBase]: 3074/4929 cut-off events. [2024-06-27 20:11:56,779 INFO L125 PetriNetUnfolderBase]: For 1932828/1932828 co-relation queries the response was YES. [2024-06-27 20:11:56,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72077 conditions, 4929 events. 3074/4929 cut-off events. For 1932828/1932828 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 29658 event pairs, 543 based on Foata normal form. 1/4929 useless extension candidates. Maximal degree in co-relation 71860. Up to 4528 conditions per place. [2024-06-27 20:11:56,875 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 613 selfloop transitions, 48 changer transitions 0/666 dead transitions. [2024-06-27 20:11:56,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 666 transitions, 9617 flow [2024-06-27 20:11:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:11:56,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-27 20:11:56,876 INFO L175 Difference]: Start difference. First operand has 463 places, 647 transitions, 7940 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:11:56,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 666 transitions, 9617 flow [2024-06-27 20:12:03,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 666 transitions, 9232 flow, removed 136 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:03,732 INFO L231 Difference]: Finished difference. Result has 467 places, 653 transitions, 7929 flow [2024-06-27 20:12:03,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7929, PETRI_PLACES=467, PETRI_TRANSITIONS=653} [2024-06-27 20:12:03,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-27 20:12:03,733 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 653 transitions, 7929 flow [2024-06-27 20:12:03,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:03,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:03,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:03,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:12:03,733 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:03,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:03,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1412274343, now seen corresponding path program 12 times [2024-06-27 20:12:03,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:03,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426598434] [2024-06-27 20:12:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:03,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:04,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:04,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426598434] [2024-06-27 20:12:04,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426598434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:04,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:04,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:04,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715023504] [2024-06-27 20:12:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:04,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:04,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:04,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:04,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 653 transitions, 7929 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:04,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:04,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:04,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:06,133 INFO L124 PetriNetUnfolderBase]: 3132/5014 cut-off events. [2024-06-27 20:12:06,133 INFO L125 PetriNetUnfolderBase]: For 2067968/2067976 co-relation queries the response was YES. [2024-06-27 20:12:06,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75300 conditions, 5014 events. 3132/5014 cut-off events. For 2067968/2067976 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 30286 event pairs, 539 based on Foata normal form. 10/5023 useless extension candidates. Maximal degree in co-relation 75081. Up to 4226 conditions per place. [2024-06-27 20:12:06,229 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 497 selfloop transitions, 191 changer transitions 0/693 dead transitions. [2024-06-27 20:12:06,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 693 transitions, 11175 flow [2024-06-27 20:12:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:12:06,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 20:12:06,230 INFO L175 Difference]: Start difference. First operand has 467 places, 653 transitions, 7929 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:12:06,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 693 transitions, 11175 flow [2024-06-27 20:12:13,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 693 transitions, 10870 flow, removed 111 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:13,775 INFO L231 Difference]: Finished difference. Result has 471 places, 668 transitions, 8921 flow [2024-06-27 20:12:13,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7624, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8921, PETRI_PLACES=471, PETRI_TRANSITIONS=668} [2024-06-27 20:12:13,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-27 20:12:13,776 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 668 transitions, 8921 flow [2024-06-27 20:12:13,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:13,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:13,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:13,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:12:13,776 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:13,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 837306830, now seen corresponding path program 22 times [2024-06-27 20:12:13,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:13,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748338195] [2024-06-27 20:12:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:13,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:14,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:14,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748338195] [2024-06-27 20:12:14,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748338195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:14,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:14,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:14,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910721201] [2024-06-27 20:12:14,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:14,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:14,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:14,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:14,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 668 transitions, 8921 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:14,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:14,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:14,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:16,213 INFO L124 PetriNetUnfolderBase]: 3142/5027 cut-off events. [2024-06-27 20:12:16,213 INFO L125 PetriNetUnfolderBase]: For 2111140/2111142 co-relation queries the response was YES. [2024-06-27 20:12:16,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77052 conditions, 5027 events. 3142/5027 cut-off events. For 2111140/2111142 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 30329 event pairs, 568 based on Foata normal form. 4/5030 useless extension candidates. Maximal degree in co-relation 76830. Up to 4405 conditions per place. [2024-06-27 20:12:16,317 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 567 selfloop transitions, 115 changer transitions 0/687 dead transitions. [2024-06-27 20:12:16,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 687 transitions, 10851 flow [2024-06-27 20:12:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:12:16,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:12:16,318 INFO L175 Difference]: Start difference. First operand has 471 places, 668 transitions, 8921 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:12:16,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 687 transitions, 10851 flow [2024-06-27 20:12:23,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 687 transitions, 10458 flow, removed 146 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:23,947 INFO L231 Difference]: Finished difference. Result has 476 places, 672 transitions, 9147 flow [2024-06-27 20:12:23,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8542, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9147, PETRI_PLACES=476, PETRI_TRANSITIONS=672} [2024-06-27 20:12:23,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-27 20:12:23,947 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 672 transitions, 9147 flow [2024-06-27 20:12:23,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:23,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:23,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:23,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:12:23,947 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:23,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1308311380, now seen corresponding path program 23 times [2024-06-27 20:12:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:23,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281401728] [2024-06-27 20:12:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:23,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:24,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:24,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281401728] [2024-06-27 20:12:24,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281401728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:24,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:24,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:24,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143095685] [2024-06-27 20:12:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:24,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:24,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:24,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:24,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 672 transitions, 9147 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:24,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:24,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:24,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:26,498 INFO L124 PetriNetUnfolderBase]: 3147/5030 cut-off events. [2024-06-27 20:12:26,498 INFO L125 PetriNetUnfolderBase]: For 2105438/2105438 co-relation queries the response was YES. [2024-06-27 20:12:26,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76815 conditions, 5030 events. 3147/5030 cut-off events. For 2105438/2105438 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 30272 event pairs, 538 based on Foata normal form. 1/5030 useless extension candidates. Maximal degree in co-relation 76591. Up to 4614 conditions per place. [2024-06-27 20:12:26,599 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 617 selfloop transitions, 64 changer transitions 0/686 dead transitions. [2024-06-27 20:12:26,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 686 transitions, 10771 flow [2024-06-27 20:12:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:12:26,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:12:26,600 INFO L175 Difference]: Start difference. First operand has 476 places, 672 transitions, 9147 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:12:26,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 686 transitions, 10771 flow [2024-06-27 20:12:34,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 686 transitions, 10194 flow, removed 176 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:34,666 INFO L231 Difference]: Finished difference. Result has 478 places, 675 transitions, 8944 flow [2024-06-27 20:12:34,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8570, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8944, PETRI_PLACES=478, PETRI_TRANSITIONS=675} [2024-06-27 20:12:34,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-27 20:12:34,667 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 675 transitions, 8944 flow [2024-06-27 20:12:34,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:34,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:34,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:34,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:12:34,667 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:34,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash 344173605, now seen corresponding path program 13 times [2024-06-27 20:12:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:34,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405816479] [2024-06-27 20:12:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:34,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:35,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:35,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405816479] [2024-06-27 20:12:35,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405816479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:35,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:35,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781555545] [2024-06-27 20:12:35,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:35,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:35,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:35,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:35,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 675 transitions, 8944 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:35,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:35,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:35,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:37,061 INFO L124 PetriNetUnfolderBase]: 3157/5047 cut-off events. [2024-06-27 20:12:37,061 INFO L125 PetriNetUnfolderBase]: For 2137420/2137428 co-relation queries the response was YES. [2024-06-27 20:12:37,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76864 conditions, 5047 events. 3157/5047 cut-off events. For 2137420/2137428 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 30389 event pairs, 538 based on Foata normal form. 10/5056 useless extension candidates. Maximal degree in co-relation 76639. Up to 4257 conditions per place. [2024-06-27 20:12:37,176 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 504 selfloop transitions, 193 changer transitions 0/702 dead transitions. [2024-06-27 20:12:37,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 702 transitions, 11268 flow [2024-06-27 20:12:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:12:37,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 20:12:37,177 INFO L175 Difference]: Start difference. First operand has 478 places, 675 transitions, 8944 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:12:37,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 702 transitions, 11268 flow [2024-06-27 20:12:44,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 702 transitions, 10830 flow, removed 118 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:44,901 INFO L231 Difference]: Finished difference. Result has 479 places, 678 transitions, 9021 flow [2024-06-27 20:12:44,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8506, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9021, PETRI_PLACES=479, PETRI_TRANSITIONS=678} [2024-06-27 20:12:44,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-27 20:12:44,901 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 678 transitions, 9021 flow [2024-06-27 20:12:44,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:44,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:44,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:44,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:12:44,902 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:44,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash 844658883, now seen corresponding path program 14 times [2024-06-27 20:12:44,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:44,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927580678] [2024-06-27 20:12:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:44,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:45,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927580678] [2024-06-27 20:12:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927580678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:45,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:45,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570867348] [2024-06-27 20:12:45,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:45,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:45,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:45,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:45,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:45,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 678 transitions, 9021 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:45,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:45,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:45,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:47,480 INFO L124 PetriNetUnfolderBase]: 3183/5077 cut-off events. [2024-06-27 20:12:47,480 INFO L125 PetriNetUnfolderBase]: For 2186799/2186807 co-relation queries the response was YES. [2024-06-27 20:12:47,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78378 conditions, 5077 events. 3183/5077 cut-off events. For 2186799/2186807 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 30570 event pairs, 543 based on Foata normal form. 10/5086 useless extension candidates. Maximal degree in co-relation 78152. Up to 4568 conditions per place. [2024-06-27 20:12:47,584 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 613 selfloop transitions, 87 changer transitions 0/705 dead transitions. [2024-06-27 20:12:47,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 705 transitions, 11523 flow [2024-06-27 20:12:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:12:47,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:12:47,585 INFO L175 Difference]: Start difference. First operand has 479 places, 678 transitions, 9021 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:12:47,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 705 transitions, 11523 flow [2024-06-27 20:12:55,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 705 transitions, 11193 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:55,912 INFO L231 Difference]: Finished difference. Result has 484 places, 686 transitions, 9250 flow [2024-06-27 20:12:55,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8697, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9250, PETRI_PLACES=484, PETRI_TRANSITIONS=686} [2024-06-27 20:12:55,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-27 20:12:55,913 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 686 transitions, 9250 flow [2024-06-27 20:12:55,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:55,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:55,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:55,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:12:55,913 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:55,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2033405494, now seen corresponding path program 24 times [2024-06-27 20:12:55,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:55,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159622510] [2024-06-27 20:12:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:55,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:56,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159622510] [2024-06-27 20:12:56,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159622510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:56,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:56,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:56,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9606724] [2024-06-27 20:12:56,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:56,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:56,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:56,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:56,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:56,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 686 transitions, 9250 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:56,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:56,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:56,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:58,535 INFO L124 PetriNetUnfolderBase]: 3193/5092 cut-off events. [2024-06-27 20:12:58,535 INFO L125 PetriNetUnfolderBase]: For 2214080/2214082 co-relation queries the response was YES. [2024-06-27 20:12:58,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78536 conditions, 5092 events. 3193/5092 cut-off events. For 2214080/2214082 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 30660 event pairs, 565 based on Foata normal form. 4/5095 useless extension candidates. Maximal degree in co-relation 78308. Up to 4494 conditions per place. [2024-06-27 20:12:58,631 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 597 selfloop transitions, 105 changer transitions 0/707 dead transitions. [2024-06-27 20:12:58,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 707 transitions, 11312 flow [2024-06-27 20:12:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:12:58,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:12:58,632 INFO L175 Difference]: Start difference. First operand has 484 places, 686 transitions, 9250 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:12:58,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 707 transitions, 11312 flow [2024-06-27 20:13:07,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 707 transitions, 10653 flow, removed 119 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:07,917 INFO L231 Difference]: Finished difference. Result has 485 places, 690 transitions, 9188 flow [2024-06-27 20:13:07,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8591, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9188, PETRI_PLACES=485, PETRI_TRANSITIONS=690} [2024-06-27 20:13:07,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-27 20:13:07,917 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 690 transitions, 9188 flow [2024-06-27 20:13:07,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:07,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:07,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:07,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:13:07,917 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:07,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash 521542058, now seen corresponding path program 15 times [2024-06-27 20:13:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733850284] [2024-06-27 20:13:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733850284] [2024-06-27 20:13:09,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733850284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:09,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:09,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405616051] [2024-06-27 20:13:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:09,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:09,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:09,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:13:09,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 690 transitions, 9188 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:09,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:09,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:13:09,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:10,793 INFO L124 PetriNetUnfolderBase]: 3198/5108 cut-off events. [2024-06-27 20:13:10,793 INFO L125 PetriNetUnfolderBase]: For 2230752/2230760 co-relation queries the response was YES. [2024-06-27 20:13:10,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78723 conditions, 5108 events. 3198/5108 cut-off events. For 2230752/2230760 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 30795 event pairs, 543 based on Foata normal form. 9/5116 useless extension candidates. Maximal degree in co-relation 78495. Up to 4538 conditions per place. [2024-06-27 20:13:10,894 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 568 selfloop transitions, 139 changer transitions 0/712 dead transitions. [2024-06-27 20:13:10,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 712 transitions, 11822 flow [2024-06-27 20:13:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:13:10,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:13:10,895 INFO L175 Difference]: Start difference. First operand has 485 places, 690 transitions, 9188 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:13:10,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 712 transitions, 11822 flow [2024-06-27 20:13:20,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 712 transitions, 11253 flow, removed 182 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:20,412 INFO L231 Difference]: Finished difference. Result has 488 places, 698 transitions, 9468 flow [2024-06-27 20:13:20,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8619, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9468, PETRI_PLACES=488, PETRI_TRANSITIONS=698} [2024-06-27 20:13:20,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-27 20:13:20,413 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 698 transitions, 9468 flow [2024-06-27 20:13:20,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:20,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:20,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:20,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:13:20,413 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:20,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash 844658480, now seen corresponding path program 25 times [2024-06-27 20:13:20,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:20,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953275912] [2024-06-27 20:13:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:20,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:21,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:21,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953275912] [2024-06-27 20:13:21,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953275912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:21,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:21,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:21,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597313928] [2024-06-27 20:13:21,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:21,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:21,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:21,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:21,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:21,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:13:21,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 698 transitions, 9468 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:21,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:21,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:13:21,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:23,112 INFO L124 PetriNetUnfolderBase]: 3227/5155 cut-off events. [2024-06-27 20:13:23,112 INFO L125 PetriNetUnfolderBase]: For 2304280/2304282 co-relation queries the response was YES. [2024-06-27 20:13:23,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80685 conditions, 5155 events. 3227/5155 cut-off events. For 2304280/2304282 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31144 event pairs, 573 based on Foata normal form. 3/5157 useless extension candidates. Maximal degree in co-relation 80455. Up to 4463 conditions per place. [2024-06-27 20:13:23,209 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 564 selfloop transitions, 154 changer transitions 0/723 dead transitions. [2024-06-27 20:13:23,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 723 transitions, 12548 flow [2024-06-27 20:13:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:13:23,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:13:23,210 INFO L175 Difference]: Start difference. First operand has 488 places, 698 transitions, 9468 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:13:23,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 723 transitions, 12548 flow [2024-06-27 20:13:33,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 723 transitions, 12058 flow, removed 169 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:33,035 INFO L231 Difference]: Finished difference. Result has 493 places, 709 transitions, 10316 flow [2024-06-27 20:13:33,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8986, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10316, PETRI_PLACES=493, PETRI_TRANSITIONS=709} [2024-06-27 20:13:33,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 20:13:33,035 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 709 transitions, 10316 flow [2024-06-27 20:13:33,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:33,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:33,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:33,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:13:33,036 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:33,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash 521304722, now seen corresponding path program 26 times [2024-06-27 20:13:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:33,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191071665] [2024-06-27 20:13:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:33,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:33,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191071665] [2024-06-27 20:13:33,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191071665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:33,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:33,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:33,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371395000] [2024-06-27 20:13:33,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:33,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:33,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:33,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:13:33,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 709 transitions, 10316 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:33,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:33,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:13:33,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:35,539 INFO L124 PetriNetUnfolderBase]: 3248/5192 cut-off events. [2024-06-27 20:13:35,539 INFO L125 PetriNetUnfolderBase]: For 2368402/2368404 co-relation queries the response was YES. [2024-06-27 20:13:35,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82639 conditions, 5192 events. 3248/5192 cut-off events. For 2368402/2368404 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 31447 event pairs, 539 based on Foata normal form. 3/5194 useless extension candidates. Maximal degree in co-relation 82406. Up to 4315 conditions per place. [2024-06-27 20:13:35,644 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 457 selfloop transitions, 270 changer transitions 0/732 dead transitions. [2024-06-27 20:13:35,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 732 transitions, 13342 flow [2024-06-27 20:13:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:13:35,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:13:35,645 INFO L175 Difference]: Start difference. First operand has 493 places, 709 transitions, 10316 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:13:35,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 732 transitions, 13342 flow [2024-06-27 20:13:47,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 732 transitions, 12782 flow, removed 235 selfloop flow, removed 3 redundant places. [2024-06-27 20:13:47,012 INFO L231 Difference]: Finished difference. Result has 500 places, 719 transitions, 11366 flow [2024-06-27 20:13:47,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9756, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11366, PETRI_PLACES=500, PETRI_TRANSITIONS=719} [2024-06-27 20:13:47,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-27 20:13:47,013 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 719 transitions, 11366 flow [2024-06-27 20:13:47,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:47,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:47,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:47,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:13:47,014 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:47,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash 521305125, now seen corresponding path program 15 times [2024-06-27 20:13:47,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:47,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947518463] [2024-06-27 20:13:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:47,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:47,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:47,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947518463] [2024-06-27 20:13:47,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947518463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:47,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:47,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817919920] [2024-06-27 20:13:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:47,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:13:47,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 719 transitions, 11366 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:47,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:47,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:13:47,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:49,719 INFO L124 PetriNetUnfolderBase]: 3274/5225 cut-off events. [2024-06-27 20:13:49,719 INFO L125 PetriNetUnfolderBase]: For 2437927/2437935 co-relation queries the response was YES. [2024-06-27 20:13:49,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84578 conditions, 5225 events. 3274/5225 cut-off events. For 2437927/2437935 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31587 event pairs, 548 based on Foata normal form. 10/5234 useless extension candidates. Maximal degree in co-relation 84342. Up to 4397 conditions per place. [2024-06-27 20:13:49,823 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 538 selfloop transitions, 205 changer transitions 0/748 dead transitions. [2024-06-27 20:13:49,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 748 transitions, 14236 flow [2024-06-27 20:13:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:13:49,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 20:13:49,824 INFO L175 Difference]: Start difference. First operand has 500 places, 719 transitions, 11366 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:13:49,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 748 transitions, 14236 flow [2024-06-27 20:14:03,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 748 transitions, 13783 flow, removed 162 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:03,851 INFO L231 Difference]: Finished difference. Result has 504 places, 725 transitions, 11571 flow [2024-06-27 20:14:03,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11571, PETRI_PLACES=504, PETRI_TRANSITIONS=725} [2024-06-27 20:14:03,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-27 20:14:03,851 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 725 transitions, 11571 flow [2024-06-27 20:14:03,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:03,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:03,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:03,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:14:03,851 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:03,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash 954808640, now seen corresponding path program 27 times [2024-06-27 20:14:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995683897] [2024-06-27 20:14:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:04,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995683897] [2024-06-27 20:14:04,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995683897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:04,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:04,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955105361] [2024-06-27 20:14:04,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:04,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:04,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:04,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:04,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:04,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 725 transitions, 11571 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:04,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:04,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:04,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:06,475 INFO L124 PetriNetUnfolderBase]: 3268/5214 cut-off events. [2024-06-27 20:14:06,475 INFO L125 PetriNetUnfolderBase]: For 2381612/2381614 co-relation queries the response was YES. [2024-06-27 20:14:06,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83229 conditions, 5214 events. 3268/5214 cut-off events. For 2381612/2381614 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31508 event pairs, 574 based on Foata normal form. 4/5217 useless extension candidates. Maximal degree in co-relation 82992. Up to 4586 conditions per place. [2024-06-27 20:14:06,591 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 624 selfloop transitions, 112 changer transitions 0/741 dead transitions. [2024-06-27 20:14:06,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 741 transitions, 13111 flow [2024-06-27 20:14:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:14:06,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:14:06,592 INFO L175 Difference]: Start difference. First operand has 504 places, 725 transitions, 11571 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:14:06,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 741 transitions, 13111 flow [2024-06-27 20:14:18,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 741 transitions, 12493 flow, removed 173 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:18,410 INFO L231 Difference]: Finished difference. Result has 508 places, 725 transitions, 11184 flow [2024-06-27 20:14:18,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10953, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11184, PETRI_PLACES=508, PETRI_TRANSITIONS=725} [2024-06-27 20:14:18,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-27 20:14:18,411 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 725 transitions, 11184 flow [2024-06-27 20:14:18,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:18,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:18,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:14:18,411 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:18,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2033416840, now seen corresponding path program 16 times [2024-06-27 20:14:18,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:18,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498915262] [2024-06-27 20:14:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:19,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:19,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498915262] [2024-06-27 20:14:19,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498915262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:19,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:19,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:19,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938759321] [2024-06-27 20:14:19,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:19,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:19,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:19,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:19,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 725 transitions, 11184 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:19,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:19,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:19,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:21,312 INFO L124 PetriNetUnfolderBase]: 3273/5220 cut-off events. [2024-06-27 20:14:21,312 INFO L125 PetriNetUnfolderBase]: For 2391049/2391057 co-relation queries the response was YES. [2024-06-27 20:14:21,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82761 conditions, 5220 events. 3273/5220 cut-off events. For 2391049/2391057 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 31604 event pairs, 542 based on Foata normal form. 9/5228 useless extension candidates. Maximal degree in co-relation 82523. Up to 4773 conditions per place. [2024-06-27 20:14:21,413 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 680 selfloop transitions, 57 changer transitions 0/742 dead transitions. [2024-06-27 20:14:21,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 742 transitions, 12908 flow [2024-06-27 20:14:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:14:21,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:14:21,414 INFO L175 Difference]: Start difference. First operand has 508 places, 725 transitions, 11184 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:14:21,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 742 transitions, 12908 flow [2024-06-27 20:14:33,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 742 transitions, 12553 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:33,822 INFO L231 Difference]: Finished difference. Result has 509 places, 728 transitions, 11155 flow [2024-06-27 20:14:33,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10829, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11155, PETRI_PLACES=509, PETRI_TRANSITIONS=728} [2024-06-27 20:14:33,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-27 20:14:33,822 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 728 transitions, 11155 flow [2024-06-27 20:14:33,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:33,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:33,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:33,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:14:33,823 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:33,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:33,823 INFO L85 PathProgramCache]: Analyzing trace with hash 844538510, now seen corresponding path program 28 times [2024-06-27 20:14:33,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:33,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087549490] [2024-06-27 20:14:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:33,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:34,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:34,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087549490] [2024-06-27 20:14:34,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087549490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:34,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:34,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848069452] [2024-06-27 20:14:34,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:34,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:34,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 728 transitions, 11155 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:34,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:34,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:34,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:36,528 INFO L124 PetriNetUnfolderBase]: 3270/5215 cut-off events. [2024-06-27 20:14:36,528 INFO L125 PetriNetUnfolderBase]: For 2399366/2399366 co-relation queries the response was YES. [2024-06-27 20:14:36,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82315 conditions, 5215 events. 3270/5215 cut-off events. For 2399366/2399366 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 31485 event pairs, 541 based on Foata normal form. 1/5215 useless extension candidates. Maximal degree in co-relation 82076. Up to 4806 conditions per place. [2024-06-27 20:14:36,636 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 688 selfloop transitions, 46 changer transitions 0/739 dead transitions. [2024-06-27 20:14:36,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 739 transitions, 12651 flow [2024-06-27 20:14:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:14:36,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:14:36,638 INFO L175 Difference]: Start difference. First operand has 509 places, 728 transitions, 11155 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:14:36,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 739 transitions, 12651 flow [2024-06-27 20:14:49,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 739 transitions, 12171 flow, removed 185 selfloop flow, removed 7 redundant places. [2024-06-27 20:14:49,477 INFO L231 Difference]: Finished difference. Result has 511 places, 728 transitions, 10773 flow [2024-06-27 20:14:49,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10675, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10773, PETRI_PLACES=511, PETRI_TRANSITIONS=728} [2024-06-27 20:14:49,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-27 20:14:49,478 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 728 transitions, 10773 flow [2024-06-27 20:14:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:49,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:49,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:14:49,478 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 844925793, now seen corresponding path program 16 times [2024-06-27 20:14:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:49,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276255213] [2024-06-27 20:14:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:49,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:50,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276255213] [2024-06-27 20:14:50,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276255213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:50,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:50,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:50,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996023309] [2024-06-27 20:14:50,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:50,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:50,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:50,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:50,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:50,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:50,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 728 transitions, 10773 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:50,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:50,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:50,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:52,209 INFO L124 PetriNetUnfolderBase]: 3264/5208 cut-off events. [2024-06-27 20:14:52,210 INFO L125 PetriNetUnfolderBase]: For 2401416/2401424 co-relation queries the response was YES. [2024-06-27 20:14:52,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81587 conditions, 5208 events. 3264/5208 cut-off events. For 2401416/2401424 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 31501 event pairs, 542 based on Foata normal form. 10/5217 useless extension candidates. Maximal degree in co-relation 81347. Up to 4684 conditions per place. [2024-06-27 20:14:52,327 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 650 selfloop transitions, 90 changer transitions 0/745 dead transitions. [2024-06-27 20:14:52,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 745 transitions, 12688 flow [2024-06-27 20:14:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:14:52,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 20:14:52,341 INFO L175 Difference]: Start difference. First operand has 511 places, 728 transitions, 10773 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:14:52,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 745 transitions, 12688 flow [2024-06-27 20:15:05,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 745 transitions, 12432 flow, removed 64 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:05,041 INFO L231 Difference]: Finished difference. Result has 511 places, 728 transitions, 10704 flow [2024-06-27 20:15:05,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10517, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10704, PETRI_PLACES=511, PETRI_TRANSITIONS=728} [2024-06-27 20:15:05,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-27 20:15:05,041 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 728 transitions, 10704 flow [2024-06-27 20:15:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:05,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:05,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:05,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:15:05,042 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:05,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1668364414, now seen corresponding path program 17 times [2024-06-27 20:15:05,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110704438] [2024-06-27 20:15:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:05,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:06,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110704438] [2024-06-27 20:15:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110704438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:06,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:06,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:15:06,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604610611] [2024-06-27 20:15:06,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:06,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:15:06,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:06,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:15:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:15:06,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:15:06,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 728 transitions, 10704 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:06,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:06,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:15:06,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:07,992 INFO L124 PetriNetUnfolderBase]: 3269/5221 cut-off events. [2024-06-27 20:15:07,992 INFO L125 PetriNetUnfolderBase]: For 2407653/2407661 co-relation queries the response was YES. [2024-06-27 20:15:08,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81855 conditions, 5221 events. 3269/5221 cut-off events. For 2407653/2407661 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 31623 event pairs, 548 based on Foata normal form. 9/5229 useless extension candidates. Maximal degree in co-relation 81616. Up to 4741 conditions per place. [2024-06-27 20:15:08,105 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 662 selfloop transitions, 77 changer transitions 0/744 dead transitions. [2024-06-27 20:15:08,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 744 transitions, 12435 flow [2024-06-27 20:15:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:15:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:15:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:15:08,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:15:08,107 INFO L175 Difference]: Start difference. First operand has 511 places, 728 transitions, 10704 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:15:08,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 744 transitions, 12435 flow [2024-06-27 20:15:22,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 744 transitions, 12149 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:22,129 INFO L231 Difference]: Finished difference. Result has 511 places, 731 transitions, 10795 flow [2024-06-27 20:15:22,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10418, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10795, PETRI_PLACES=511, PETRI_TRANSITIONS=731} [2024-06-27 20:15:22,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-27 20:15:22,130 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 731 transitions, 10795 flow [2024-06-27 20:15:22,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:22,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:22,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:22,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 20:15:22,130 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:22,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:22,131 INFO L85 PathProgramCache]: Analyzing trace with hash 521304908, now seen corresponding path program 18 times [2024-06-27 20:15:22,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:22,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268863596] [2024-06-27 20:15:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:22,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:23,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:23,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268863596] [2024-06-27 20:15:23,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268863596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:23,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:23,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:15:23,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791780987] [2024-06-27 20:15:23,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:23,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:15:23,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:23,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:15:23,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:15:23,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:15:23,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 731 transitions, 10795 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:23,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:23,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:15:23,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:25,106 INFO L124 PetriNetUnfolderBase]: 3274/5230 cut-off events. [2024-06-27 20:15:25,106 INFO L125 PetriNetUnfolderBase]: For 2418192/2418200 co-relation queries the response was YES. [2024-06-27 20:15:25,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81626 conditions, 5230 events. 3274/5230 cut-off events. For 2418192/2418200 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 31670 event pairs, 550 based on Foata normal form. 9/5238 useless extension candidates. Maximal degree in co-relation 81388. Up to 4641 conditions per place. [2024-06-27 20:15:25,232 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 598 selfloop transitions, 145 changer transitions 0/748 dead transitions. [2024-06-27 20:15:25,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 748 transitions, 13212 flow [2024-06-27 20:15:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:15:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:15:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:15:25,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:15:25,233 INFO L175 Difference]: Start difference. First operand has 511 places, 731 transitions, 10795 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:15:25,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 748 transitions, 13212 flow [2024-06-27 20:15:37,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 748 transitions, 12733 flow, removed 108 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:37,869 INFO L231 Difference]: Finished difference. Result has 511 places, 734 transitions, 10829 flow [2024-06-27 20:15:37,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10316, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10829, PETRI_PLACES=511, PETRI_TRANSITIONS=734} [2024-06-27 20:15:37,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-27 20:15:37,870 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 734 transitions, 10829 flow [2024-06-27 20:15:37,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:37,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:37,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:37,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 20:15:37,870 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:37,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:37,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1531450527, now seen corresponding path program 17 times [2024-06-27 20:15:37,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:37,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498362995] [2024-06-27 20:15:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:37,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:38,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:38,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498362995] [2024-06-27 20:15:38,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498362995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:38,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:38,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:15:38,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922831793] [2024-06-27 20:15:38,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:38,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:15:38,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:38,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:15:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:15:38,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:15:38,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 734 transitions, 10829 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:38,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:38,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:15:38,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:40,738 INFO L124 PetriNetUnfolderBase]: 3262/5208 cut-off events. [2024-06-27 20:15:40,738 INFO L125 PetriNetUnfolderBase]: For 2408023/2408031 co-relation queries the response was YES. [2024-06-27 20:15:40,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79868 conditions, 5208 events. 3262/5208 cut-off events. For 2408023/2408031 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 31599 event pairs, 542 based on Foata normal form. 12/5219 useless extension candidates. Maximal degree in co-relation 79631. Up to 4652 conditions per place. [2024-06-27 20:15:40,836 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 660 selfloop transitions, 90 changer transitions 0/755 dead transitions. [2024-06-27 20:15:40,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 755 transitions, 13255 flow [2024-06-27 20:15:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:15:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:15:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:15:40,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:15:40,837 INFO L175 Difference]: Start difference. First operand has 511 places, 734 transitions, 10829 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:15:40,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 755 transitions, 13255 flow [2024-06-27 20:15:52,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 755 transitions, 12578 flow, removed 207 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:52,416 INFO L231 Difference]: Finished difference. Result has 516 places, 737 transitions, 10519 flow [2024-06-27 20:15:52,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10184, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10519, PETRI_PLACES=516, PETRI_TRANSITIONS=737} [2024-06-27 20:15:52,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-27 20:15:52,416 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 737 transitions, 10519 flow [2024-06-27 20:15:52,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:52,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:52,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:52,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 20:15:52,417 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:52,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2033417057, now seen corresponding path program 18 times [2024-06-27 20:15:52,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:52,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817407096] [2024-06-27 20:15:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:53,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:53,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817407096] [2024-06-27 20:15:53,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817407096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:53,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:53,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:15:53,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314985271] [2024-06-27 20:15:53,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:53,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:15:53,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:53,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:15:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:15:53,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:15:53,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 737 transitions, 10519 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:53,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:53,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:15:53,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:55,063 INFO L124 PetriNetUnfolderBase]: 3256/5206 cut-off events. [2024-06-27 20:15:55,063 INFO L125 PetriNetUnfolderBase]: For 2362756/2362764 co-relation queries the response was YES. [2024-06-27 20:15:55,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78942 conditions, 5206 events. 3256/5206 cut-off events. For 2362756/2362764 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 31575 event pairs, 544 based on Foata normal form. 10/5215 useless extension candidates. Maximal degree in co-relation 78702. Up to 4748 conditions per place. [2024-06-27 20:15:55,185 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 692 selfloop transitions, 58 changer transitions 0/755 dead transitions. [2024-06-27 20:15:55,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 755 transitions, 12308 flow [2024-06-27 20:15:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:15:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:15:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:15:55,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:15:55,186 INFO L175 Difference]: Start difference. First operand has 516 places, 737 transitions, 10519 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:15:55,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 755 transitions, 12308 flow [2024-06-27 20:16:08,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 755 transitions, 12144 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:08,494 INFO L231 Difference]: Finished difference. Result has 520 places, 741 transitions, 10725 flow [2024-06-27 20:16:08,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10364, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10725, PETRI_PLACES=520, PETRI_TRANSITIONS=741} [2024-06-27 20:16:08,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-27 20:16:08,494 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 741 transitions, 10725 flow [2024-06-27 20:16:08,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:08,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:08,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:08,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 20:16:08,495 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:08,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash 521318145, now seen corresponding path program 19 times [2024-06-27 20:16:08,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:08,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907924161] [2024-06-27 20:16:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:08,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:09,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:09,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907924161] [2024-06-27 20:16:09,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907924161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:09,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:09,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:16:09,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237623716] [2024-06-27 20:16:09,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:09,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:16:09,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:16:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:16:09,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:16:09,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 741 transitions, 10725 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:09,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:09,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:16:09,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:11,352 INFO L124 PetriNetUnfolderBase]: 3250/5188 cut-off events. [2024-06-27 20:16:11,353 INFO L125 PetriNetUnfolderBase]: For 2357983/2357985 co-relation queries the response was YES. [2024-06-27 20:16:11,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78547 conditions, 5188 events. 3250/5188 cut-off events. For 2357983/2357985 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 31432 event pairs, 534 based on Foata normal form. 4/5191 useless extension candidates. Maximal degree in co-relation 78306. Up to 4772 conditions per place. [2024-06-27 20:16:11,471 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 682 selfloop transitions, 66 changer transitions 0/753 dead transitions. [2024-06-27 20:16:11,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 753 transitions, 12275 flow [2024-06-27 20:16:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:16:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:16:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:16:11,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 20:16:11,472 INFO L175 Difference]: Start difference. First operand has 520 places, 741 transitions, 10725 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:16:11,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 753 transitions, 12275 flow [2024-06-27 20:16:22,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 753 transitions, 11874 flow, removed 145 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:22,543 INFO L231 Difference]: Finished difference. Result has 522 places, 741 transitions, 10463 flow [2024-06-27 20:16:22,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10324, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10463, PETRI_PLACES=522, PETRI_TRANSITIONS=741} [2024-06-27 20:16:22,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-27 20:16:22,543 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 741 transitions, 10463 flow [2024-06-27 20:16:22,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:22,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:22,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:22,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 20:16:22,544 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:22,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:22,544 INFO L85 PathProgramCache]: Analyzing trace with hash 344173388, now seen corresponding path program 19 times [2024-06-27 20:16:22,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:22,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874815391] [2024-06-27 20:16:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:22,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:23,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:23,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874815391] [2024-06-27 20:16:23,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874815391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:23,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:23,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:16:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576504068] [2024-06-27 20:16:23,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:16:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:16:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:16:23,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:16:23,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 741 transitions, 10463 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:23,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:23,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:16:23,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:25,390 INFO L124 PetriNetUnfolderBase]: 3247/5191 cut-off events. [2024-06-27 20:16:25,390 INFO L125 PetriNetUnfolderBase]: For 2346318/2346326 co-relation queries the response was YES. [2024-06-27 20:16:25,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77984 conditions, 5191 events. 3247/5191 cut-off events. For 2346318/2346326 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 31507 event pairs, 537 based on Foata normal form. 9/5199 useless extension candidates. Maximal degree in co-relation 77742. Up to 4606 conditions per place. [2024-06-27 20:16:25,504 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 602 selfloop transitions, 149 changer transitions 0/756 dead transitions. [2024-06-27 20:16:25,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 756 transitions, 12478 flow [2024-06-27 20:16:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:16:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:16:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:16:25,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 20:16:25,505 INFO L175 Difference]: Start difference. First operand has 522 places, 741 transitions, 10463 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:16:25,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 756 transitions, 12478 flow Killed by 15